SERVICE MANUAL MXZ-2A40VA - MXZ-2A52VA - MXZ-3A54VA - MXZ-3A54VA - MXZ-4A71VA - MXZ-4A71VA - MXZ-4A80VA - E1 OUTDOOR UNIT. No. OB377 REVISED EDITION-A

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1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS Revision : A MXZ-A5/A7VA- MXZ-A0/A5VA- Please void OB77 E E has been added. has been added. OUTDOOR UNIT SERVICE MANUAL HFC utilized R0A No. OB77 REVISED EDITION-A Inverter-controlled multi system type Models E MXZ-A0VA - E MXZ-A5VA - E MXZ-A5VA - E MXZ-A5VA - E MXZ-A7VA - E MXZ-A7VA - MXZ-A80VA - E Indoor unit service manual MSZ-FA VA Series (OB7) MSZ-GA VA Series (OB78,OB88) MSZ-CB VA Series (OB) CONTENTS MXZ-A80VA. TECHNICAL CHANGES. PART NAMES AND FUNCTIONS 7. INDOOR/OUTDOOR CORRESPONDENCE TABLE 8. INDOOR UNITS COMBINATION 0 5. SPECIFICATION 6. NOISE CRITERIA CURVES 7 7. OUTLINES AND DIMENSIONS 8 8. WIRING DIAGRAM 9. REFRIGERANT SYSTEM DIAGRAM 5 0. PERFORMANCE CURVES 9. ACTUATOR CONTROL 50. SERVICE FUNCTIONS 50. TROUBLESHOOTING 5. DISASSEMBLY INSTRUCTIONS PARTS LIST OPTIONAL PARTS BACK COVER NOTE: This service manual describes technical data of outdoor units.

2 Revision : A MXZ-A5/A7VA- E has been added. Quick clean kit has been removed.(refer to ) MXZ-A0/5VA- E has been added. TECHNICAL CHANGES MXZ-A6WV - E MXZ-A5VA -. Indication of capacity has been changed. (BTU kw). Capacity specification has been changed. (Cooling capacity 7.kW 5.kW). Dimensions of unit has been changed. (W900oH900oD0 W80oH70oD0). Combinations of connectable indoor units have been changed. 5. Capacity class of connectable indoor units have been changed. 6. Communication system has been changed. 7. Power supply way has been changed(change to supply to outdoor unit). 8. Compressor has been changed. (TNB0FMCH SNB0FLDH) 9. High-pressure switch has been removed. 0.Outdoor fan motor has been changed. (PM8H60-UA RC0J60-AA).Evaporation temperature thermistor has been removed..ambient temperature thermistor has been added..new dip switch has been added to the controller board for "Locking the operation "mode and "Lowering the operating noise "mode..a Quick Clean Kit has been added. E MXZ-AWV - E MXZ-A7VA -. Indication of capacity has been changed. (BTU kw). Capacity specification has been changed. (Cooling capacity kw 7.kW). Dimensions of unit has been changed. (W900oH900oD0 W80oH70oD0). Combinations of connectable indoor units have been changed. 5. Capacity class of connectable indoor units have been changed. 6. Communication system has been changed. 7. Power supply way has been changed(change to supply to outdoor unit). 8. Compressor has been changed. (TNB0FMCH SNB0FLDH) 9. High-pressure switch has been removed. 0. Outdoor fan motor has been changed. (PM8H60-U RC0J60-AA). Evaporation temperature thermistor has been removed.. Ambient temperature thermistor has been added.. New dip switch has been added to the controller board for "Locking the operation "mode and "Lowering the operating noise "mode.. A Quick Clean Kit has been added. MXZ-AWV - E MXZ-A80VA -. Indication of capacity has been changed. (BTU kw). Communication system has been changed.. Power supply way has been changed(change to supply to outdoor unit).. Evaporation temperature thermistor has been removed. 5. Ambient temperature thermistor has been added. 6. New dip switch has been added to the controller board for "Locking the operation "mode and "Lowering the operating noise "mode. 7. A Quick Clean Kit has been added. E E

3 MXZ-AWV - E MXZ-A0VA -. Indication of capacity has been changed. (BTU kw). Dimensions of unit has been changed. (W80oH60oD0 W800oH550oD85). Communication system has been changed.. Power supply way has been changed(change to supply to outdoor unit). 5. Compressor has been changed. (SNV09FJYH SNB0FKCH) 6. Outdoor fan motor has been changed. (RA6V9 RC0J50-CF) 7. Evaporation temperature thermistor has been removed. 8. Pas pipe temperature thermistor has been removed. 9. Ambient temperature thermistor has been added. E MXZ-A8WV - E MXZ-A5VA -. Indication of capacity has been changed. (BTU kw). Cooling capacity specification has been changed. (5.kW 5.kW). Heating capacity specification has been changed. (6.6kW 6.kW). Dimensions of unit has been changed. (W80oH60oD0 W800oH550oD85) 5. Communication system has been changed. 6. Power supply way has been changed(change to supply to outdoor unit). 7. Compressor has been changed. (SNV09FJYH SNB0FKCH) 8. Outdoor fan motor has been changed. (RA6V9 RC0J50-CF) 9. Evaporation temperature thermistor has been removed. 0.Pas pipe temperature thermistor has been removed.. Ambient temperature thermistor has been added. E MXZ-A5VA - E MXZ-A5VA - MXZ-A7VA - E MXZ-A7VA -. Quick clean kit has been removed. E E

4 INFORMATION FOR THE AIR CONDITIONER WITH R0A REFRIGERANT This room air conditioner adopts HFC refrigerant (R0A) which never destroys the ozone layer. Pay particular attention to the following points, though the basic installation procedure is same as that for R air conditioners. As R0A has working pressure approximate.6 times as high as that of R, some special tools and piping parts/ materials are required. Refer to the table below. Take sufficient care not to allow water and other contaminations to enter the R0A refrigerant during storage and installation, since it is more susceptible to contaminations than R. For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R0A. (Refer to. Refrigerant piping.) Composition change may occur in R0A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change. Refrigeration Refrigerant oil New refrigerant Refrigerant R0A Composition (Ratio) HFC-: HFC-5 (50%:50%) Refrigerant handling Pseudo-azeotropic refrigerant Chlorine Not included Safety group (ASHRAE) A/A Molecular weight 7.6 Boiling point (:) -5. Steam pressure [5:](Mpa).557 Saturated steam density [5:](Kg/K) 6 Combustibility Non combustible ODP w 0 GWP w 70 Refrigerant charge method From liquid phase in cylinder Additional charge on leakage Possible Kind Incompatible oil Color Non Smell Non w :Ozone Destruction Parameter : based on CFC- w :Global Warmth Parameter : based on CO Previous refrigerant R R (00%) Single refrigerant Included A Non combustible Gas phase Possible Compatible oil Light yellow Non Compressor New Specification Current Specification The incompatible refrigeration oil easily separates from refrigerant and is in the upper layer inside the suction muffler. Raising position of the oil back hole enables to back the Since refrigerant and refrigerantion oil are compatible each, refrigeration oil goes back to the compressor through the lower position oil back hole. refrigeration oil of the upper layer to flow back to the compressor. Suction muffler Suction muffler Compressor Oil back hole Refrigeration oil Compressor Oil back hole Refrigerant Refrigeration oil /Refrigerant NOTE : The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is: (MPa [Gauge]) =0.(kgf/f [Gauge])

5 Conversion chart of refrigerant temperature and pressure (MPa [Gauge]).0.5 R0A Saturated liquid pressure R NOTE : The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is: (MPa [Gauge]) =0.(kgf/f [Gauge]) (:).Tools dedicated for the air conditioner with R0A refrigerant The following tools are required for R0A refrigerant. Some R tools can be substituted for R0A tools. The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/6 UNF with 0 threads to / UNF with 0 threads. R0A tools Can R tools be used? Description R0A has high pressures beyond the measurement range of existing Gauge manifold No gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit. Charge hose Gas leak detector No No Hose material and cap size have been changed to improve the pressure resistance. Dedicated for HFC refrigerant. Torque wrench Yes 6.5 mm and 9.5 mm No.7 mm and 5.88 mm Flare tool Flare gauge Yes New Clamp bar hole has been enlarged to reinforce the spring strength in the tool. Provided for flaring work (to be used with R flare tool). Vacuum pump Provided to prevent the back flow of oil. This adapter enables you to use New adapter vacuum pumps. Electronic scale for It is difficult to measure R0A with a charging cylinder because the New refrigerant charging refrigerant bubbles due to high pressure and high-speed vaporization No : Not Substitutable for R0A Yes : Substitutable for R0A.Refrigerant piping Specifications Use the copper or copper-alloy seamless pipe for refrigerant that meet the following specifications. Outside diameter mm Wall thickness 0.8 mm 0.8 mm 0.8 mm.0 mm Insulation material Heat resisting foam plastic Specific gravity 0.05 Thickness 8 mm 5

6 Flaring work and flare nut Flaring work for R0A pipe differs from that for R pipe. For details of flaring work, refer to Installation manual FLARING WORK. Pipe diameter mm Dimension of flare nut R0A R 7 7.Refrigerant oil Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces..air purge Do not discharge the refrigerant into the atmosphere. Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant circuit. Use the vacuum pump for air purging for the purpose of environmental protection. 5.Additional charge For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, ability of the refrigeration cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly. Indoor unit Refrigerant gas cylinder operating valve Union Liquid pipe Gas pipe Service port Stop valve Outdoor unit Gauge manifold valve (for R0A) Charge hose (for R0A) Refrigerant gas cylinder for R0A with siphon Refrigerant (liquid) Electronic scale for refrigerant charging 6

7 PART NAMES AND FUNCTIONS MXZ-A0VA MXZ-A5VA MXZ-A5VA MXZ-A7VA Air inlet (back and side) Piping Drain hose Air outlet Air inlet (Back and side) Air outlet Drain outlet Drain outlet MXZ-A80VA Air inlet (Back and side) Air outlet Drain outlet ACCESSORIES Drain socket Drain cap Quick Clean kit MXZ-A0VA MXZ-A5VA MXZ-A5VA - E MXZ-A7VA - E MXZ-A5VA - E MXZ-A7VA - E MXZ-A80VA 7

8 Combination of the connectable indoor units Combination of the connectable indoor units Combination of the connectable indoor units Combination of the connectable indoor units INDOOR/ OUTDOOR CORRESPONDENCE TABLE MXZ-A0VA MXZ-A5VA MXZ-A5VA There is no combination other than this table. MXZ-A7VA

9 Combination of the connectable indoor units Combination of the connectable indoor units MXZ-A80VA There is no combination other than this table. MXZ-A80VA

10 INDOOR UNITS COMBINATION MXZ-A0VA Indoor units Cooling capacity (kw) combination Unit A Unit B Total. ( ).5 (0.9 -.).5 ( ).8 (. -.).9 (. -.).9 (. -.).9 (. -.).0 (. -.5) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) 0.0 ( ) 0.90 ( ) 0.70 ( ) 0.80 (0 -.0) (0 -.0) (0 -.0) (0 -.0).05 (0 -.70) Current (A) Power factor (%) Indoor units Heating capacity (kw) combination Unit A Unit B Total. ( ).6 ( ).0 ( ). (.0 -.8). (.0 -.8). (.0 -.9). (.0 -.9).5 (.0-5.0) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) ( ) 0.70 ( ) ( ) 0.90 ( ) 0.90 ( ) 0.90 ( ) 0.90 ( ) 0.95 ( ) Current (A) Power factor (%)

11 MXZ-A5VA Indoor units Cooling capacity (kw) combination Unit A Unit B Total. ( ).5 (0.9 -.).5 ( ). (. - 5.).7 (. - 5.) 5.0 ( ) 5.0 ( ) 5. ( ) 5. ( ) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) 0.0 ( ) 0.90 ( ) 0.70 ( ).0 (0-.50).50 ( ).00 ( ).00 ( ).50 (0 -.70).505 (0 -.80) Current (A) Power factor (%) Indoor units Heating capacity (kw) combination Unit A Unit B Total. ( ).6 ( ).0 ( ) 6. (.0-6.7) 6. (.0-6.8) 6. (.0-7.0) 6. (.0-7.0) 6. (.0-7.) 6. (.0-7.) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) ( ) 0.70 ( ) ( ).550 ( ).600 ( ).650 ( ).650 ( ).650 ( ).705 ( ) Current (A) Power factor (%)

12 MXZ-A5VA Cooling capacity (kw) Indoor units combination Unit A Unit B Unit C Total. (. -.0).5 (. -.).5 (.5 -.) 5.0 (.6-5.6). (.0-5.).7 (.0-5.8) 5. (.0-6.8) 5. (.0-6.8) 5.0 (.0-6.0) 5. (.0-6.8) 5. (.0-6.8) 5. (.0-6.8) 5. (.0-6.8) 5. ( ) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) 5. (.9-6.8) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) 90 ( ) ( ) ( ).500 ( ).80 (0 -.50).00 (0 -.60).600 ( ).580 (50 -.0).0 ( ).600 ( ).580 (50 -.0).600 ( ).50 (50 -.0).550 (60 -.0).95 ( ).95 ( ).95 ( ).65 ( ).95 ( ).95 ( ).65 ( ).95 ( ).95 ( ).95 ( ).65 ( ).95 ( ) Current (A) Power factor (%)

13 Heating capacity (kw) Indoor units combination Unit A Unit B Unit C Total. (. -.).6 (. -.5).0 (. -.8) 6.8 (. - 8.) 6.6 (.8-7.) 6.8 (.8-8.7) 6.8 (.8-9.0) 6.8 (.8-9.0) 6.8 (.8-9.0) 6.8 (.8-9.0) 6.8 (.8-9.0) 6.8 (.8-9.0) 6.8 (.8-9.0) 6.8 (.9-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) 6.8 (.6-9.0) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) 0.80 ( ) 0.90 ( ).00 ( ).770 ( ).500 ( ).580 ( ).580 ( ).0 ( ).580 ( ).580 ( ).0 ( ).580 ( ).0 ( ).90 ( ).55 (00 -.0).55 (00 -.0).55 (00 -.0).0 ( ).55 (00 -.0).55 (00 -.0).0 ( ).55 (00 -.0).55 (00 -.0).55 (00 -.0).0 ( ).55 ( ) Current (A) Power factor (%)

14 MXZ-A7VA Cooling capacity (kw) Indoor units combination Unit A Unit B Unit C Unit D Total. (. -.0).5 (. -.).5 (.5 -.) 5.0 (.6-5.6) 6.0 (.6-6.0). (.0-5.).7 (.0-5.8) 5.7 (.0-6.6) 6.8 (.0-7.) 6.8 (.0-7.) 5.0 (.0-6.0) 6.0 (.0-7.) 6.8 (.0-7.) 6.8 (.0-7.) 6.8 (.0-7.) 6.8 (.0-7.) 6.8 (.0-7.) 6.8 (. - 7.) 6.8 (. -7.) 6.8 (. - 7.) 6.6 (.9-8.) 6.9 (.9-8.) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) 90 ( ) ( ) ( ).500 ( ).0 ( ).80 (0 -.50).00 (0 -.60).800 (0 -.00).0 ( ).60 ( ).0 ( ).00 (0 -.50).0 ( ).60 ( ).570 ( ).0 ( ).60 ( ).80 ( ).00 ( ).0 ( ).750 ( ).880 ( ).0 ( ).960 ( ).950 ( ).0 ( ).0 ( ).960 ( ).950 ( ).0 ( ).960 ( ).950 ( ).90 ( ).0 ( ) Current (A) Power factor (%)

15 Cooling capacity (kw) Indoor units combination Unit A Unit B Unit C Unit D Total 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.9-8.5) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) 7. (.7-8.8) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw). ( ).96 ( ).95 ( ). ( ).96 ( ).95 ( ).9 ( ). ( ).96 ( ).95 ( ).95 ( ).95 ( ).9 ( ).95 ( ).95 ( ).9 ( ).95 ( ).95 ( ).95 ( ).9 ( ).95 ( ).95 ( ).95 ( ).9 ( ).95 ( ) Current (A) Power factor (%) 5

16 Heating capacity (kw) Indoor units combination Unit A Unit B Unit C Unit D Total. (. -.).6 (. -.5).0 (. -.8) 7. (. - 8.) 7.9 (. - ) 6.6 (.8-7.) 6.9 (.8-8.7) 7. (.8-9.0) (.8-9.0) (.8-9.0) 7. (.8-9.0) 7.6 (.8-9.0) (.8-9.0) (.8-9.0) (.8-9.0) (.8-9.0) (.8-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw) 0.80 ( ) 0.90 ( ).00 ( ).880 ( ).50 ( ).500 ( ).60 ( ).770 ( ).0 ( ).090 ( ).70 ( ).890 ( ).0 ( ).090 ( ).00 ( ).0 ( ).090 ( ).80 ( ).80 ( ).80 ( ).00 (00 -.0).00 (00 -.0).00 (00 -.0).860 ( ).850 ( ).00 (00 -.0).00 (00 -.0).860 ( ).850 ( ).00 (00 -.0).860 ( ).850 ( ).670 ( ).00 (00 -.0) Current (A) Power factor (%)

17 Heating capacity (kw) Indoor units combination Unit A Unit B Unit C Unit D Total (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) (.6-9.0) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) NOTE: Electrical data is for outdoor unit only. Outdoor unit power consumption (kw).00 (00 -.0).860 ( ).850 ( ).00 (00 -.0).860 ( ).850 ( ).670 ( ).00 (00 -.0).860 ( ).90 ( ).90 ( ).90 ( ).770 ( ).90 ( ).90 ( ).770 ( ).90 ( ).90 ( ).90 ( ).770 ( ).90 ( ).90 ( ).90 ( ).770 ( ).90 ( ) Current (A) Power factor (%) 7

18 8 Indoor units combination Unit A Unit B Unit C Unit D Cooling capacity (kw) Total Outdoor unit power consumption (kw) Current (A) Power factor (%) NOTE: Electrical data is for outdoor unit only MXZ-A80VA (.-.0).5 (.-.).5 (.5-.) 5.0 (.6-5.6) 6.0 (.6-6.6) 7. (.7-7.). (.0-5.).7 (.0-5.8) 5.7 (.0-6.6) 7. (.0-7.7) 7.75 (.0-) 7.85 (.0-8.) 5.0 (.0-6.) 6.0 (.0-7.) 7.5 (.0-8.5) 7.75 (.0-) 7.85 (.0-8.7) 7.0 (.0-7.) 7.75 (.0-8.8) 7.85 (.0-8.8) 7.95 (.0-8.8) 7.9 (.-8.8) (.-8.8) (.-8.8) (.-8.8) (.-8.8) 6.6 (.9-8.) 6.9 (.9-8.) 7.7 (.9-9.0) 7.85 (.9-9.0) 7.95 (.9-9.0) (.9-9.0) 7. (.9-8.9) 7.75 (.9-9.0) ( ) ( ).00 ( ).0 ( ).90 ( ).580 ( ).0 ( ).70 ( ).70 ( ).50 (60-.70).750 ( ).80 (60-.00).60 ( ).00 (0-.50).580 (60-.00).750 (60-.80).80 (60-.0).00 (0-.550).760 (60-.0).70 (60-.80).780 (60-.80).780 (90-.60).800 (70-.0).800 (70-.0).690 ( ).690 ( ).860 ( ).970 ( ).0 ( ).0 ( ).70 ( ).90 ( ).00 ( ).50 ( )

19 9 Indoor units combination Unit A Unit B Unit C Unit D Cooling capacity (kw) Total Outdoor unit power consumption (kw) Current (A) Power factor (%) NOTE: Electrical data is for outdoor unit only (.9-9.0) (.9-9.0) (.9-9.0) 7.85 (.9-9.0) 7.9 (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) 7.5 (.9-9.0) 7.75 (.9-9.0) 7.9 (.9-9.0) (.9-9.0) (.9-9.0) 7.85 (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) 7.95 (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) (.9-9.0) 7.8 (.7-9.) 7.85 (.7-9.) 7.95 (.7-9.) (.7-9.) (.7-9.) (.7-9.) 7.85 (.7-9.).70 ( ).90 ( ).90 ( ).50 ( ).0 ( ).50 ( ).50 ( ).0 ( ).00 ( ).00 ( ).50 ( ).50 ( ).70 ( ).90 ( ).90 ( ).50 ( ).80 ( ).50 ( ).50 ( ).0 ( ).00 ( ).80 ( ).80 ( ).60 ( ).60 ( ).0 ( ).0 ( ).80 ( ).90 ( ).0 ( ).50 ( ).0 ( ).0 ( ).90 ( )

20 0 Indoor units combination Unit A Unit B Unit C Unit D Cooling capacity (kw) Total Outdoor unit power consumption (kw) Current (A) Power factor (%) NOTE: Electrical data is for outdoor unit only (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) 7.9 (.7-9.) 7.95 (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) 7.9 (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.) (.7-9.).0 ( ).50 ( ).0 ( ).0 ( ).0 ( ).0 ( ).00 ( ).070 ( ).0 ( ).0 ( ).50 ( ).0 ( ).0 ( ).0 ( ).00 ( ).00 ( ).080 ( ).50 ( ).0 ( ).50 ( ).0 ( ).0 ( ).0 ( ).00 ( ).90 ( )

21 Indoor units combination Unit A Unit B Unit C Unit D Heating capacity (kw) Total Outdoor unit power consumption (kw) Current (A) Power factor (%) NOTE: Electrical data is for outdoor unit only (.-.).6 (.-.5).0 (.-.8) 7. (.-8.) 7.9 (.-) (.6-9.) 6.6 (.8-7.) 6.9 (.8-8.7) 7. (.8-9.) 8.9 (.8-9.9) (.8-9.9) (.8-9.9) 7. (.8-9.) 7.6 (.8-9.5) 9.0 (.8-0.) (.8-0.) (.8-0.) (.8-9.8) (.8-) (.8-) (.8-) (.9-.) (.9-.) (.9-.) (.9-.) (.9-.) 8.7 (.6-0.6) 8.8 (.6-.) (.6-.6) (.6-.6) (.6-.6) (.6-.6) 8.9 (.6-.6) (.6-.6).050 ( ).0 ( ).0 ( ).70 ( ).700 ( ).0 ( ).00 ( ).0 ( ).0 ( ).70 ( ).70 ( ).70 ( ).70 ( ).0 ( ).50 ( ).70 ( ).70 ( ).70 ( ).560 ( ).560 ( ).560 ( ).70 (0.0-.0).70 (0.0-.0).70 (0.0-.0).70 (0.0-.0).70 (0.0-.0).50 (0-.060).70 (0-.0).0 (0-.00).0 (0-.0).0 (0-.0).0 (0-.0).70 (0-.0).70 (0-.0)

22 Indoor units combination Unit A Unit B Unit C Unit D Heating capacity (kw) Total Outdoor unit power consumption (kw) Current (A) Power factor (%) NOTE: Electrical data is for outdoor unit only (.6-.6) (.6-.6) (.6-.6) (.6-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) 9.0 (.6-.6) (.6-.6) (.6-.6) (.6-.6) (.6-.6) (.6-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) (.6-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) (.7-.6) (.-.6) (.-.6) (.-.6) (.5-.6) (.5-.6) (.5-.6) (.-.6).00 (0-.0).00 (0-.0).00 (0-.0).0 (0-.00).050 (0-.0).050 (0-.0).050 (0-.0).960 ( ).960 ( ).960 ( ).70 (0-.0).50 (0-.0).090 (0-.0).090 (0-.0).090 (0-.0).90 (0-.00).00 (0-.0).00 (0-.0).00 (0-.0).90 ( ).90 ( ).70 (0-.80).00 (0-.60).00 (0-.60).00 (0-.60).90 ( ).90 ( ).00 (90-.0).0 (90-.0).960 (90-.90).90 (80-.60).90 (80-.60).90 (80-.60).980 (90-.00)

23 Indoor units combination Unit A Unit B Unit C Unit D Heating capacity (kw) Total Outdoor unit power consumption (kw) Current (A) Power factor (%) NOTE: Electrical data is for outdoor unit only (.-.6) (.5-.6) (.5-.6) (.5-.6) (.-.6) (.5-.6) (.5-.6) (.-.6) (.-.6) (.-.6) (.5-.6) (.5-.6) (.-.6) (.5-.6) (.5-.6) (.-.6) (.5-.6) (.-.6) (.-.6) (.5-.6) (.5-.6) (.-.6) (.5-.6) (.-.6) (.-.6).90 (90-.90).890 (80-.70).890 (80-.70).890 (80-.70).90 (90-.0).80 (80-.0).80 (80-.0).750 (50-.0).960 (90-.90).90 (90-.70).870 (80-.0).870 (80-.0).890 (90-.0).800 (80-.00).800 (80-.00).860 (90-.80).780 (80-.0).950 (90-.90).90 (90-.50).860 (80-.0).860 (80-.0).870 (90-.00).780 (80-.90).80 (90-.60).90 (90-.0)

24 5 SPECIFICATION Capacity System Electrical data Compressor Fan motor Special remarks Outdoor model Outdoor unit power supply Indoor units number Piping total length Connecting pipe length Height difference (Indoor ~ Outdoor) Height difference (Indoor ~ Indoor) Function Capacity [Rated (Min.-Max.) Hz] Dehumidification Outdoor air flow Power outlet Running current Power input Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Output Winding resistance(at 0:) Model Winding resistance(at 0:) Dimensions WOHOD Weight Sound level (High/Low) Fan speed (High/Low) Fan speed regulator Refrigerant filling capacity(r0a) Refrigeration oil (Model) m m m m kw R/h K /h A A W % A A A W " " mm kg db rpm kg cc Cooling.0 (. -.5),860.78,05 MXZ-A0VA Single phase 0V,50Hz Max. 0 Max. 0 Refer to 9 Refer to SNB0FKCH,00 U-V 0.6 V-W 0.6 W-U 0.6 RC0J50-CF -WHT. WHT-RED. RED-. 800o550o85 0 7/ 850/ (NEO) Heating.5 (.0-5.0), /7 850/90 NOTE: Test conditions are based on ISO 55 (Refrigerant piping length (one way) :5m) Refer to INDOOR/OUTDOOR CORRESPONDENCE TABLE for the combination. Measured under rated operating frequency. Electrical data is for only outdoor unit. These specifications are when all indoor units are operating. TEST CONDITIONS COOLING INDOOR DB7.0 C WB9.0 C OUTDOOR DB5.0 C WB.0 C HEATING INDOOR DB0.0 C OUTDOOR DB 7.0 C WB 6.0 C Cooling 5. ( ), ,505 MXZ-A5VA Single phase 0V,50Hz Max. 0 Max. 0 Refer to 9 Refer to SNB0FKCH,00 U-V 0.6 V-W 0.6 W-U 0.6 RC0J50-CF -WHT. WHT-RED. RED-. 800o550o85 0 9/5 850/ (NEO) Heating 6. (.0-7.), ,705 50/8 850/90

25 Capacity System Electrical data Compressor Fan motor Special remarks Outdoor model Outdoor unit power supply Indoor units number Piping total length Connecting pipe length Height difference (Indoor ~ Outdoor) Height difference (Indoor ~ Indoor) Function Capacity [Rated (Min.-Max.) Hz] Dehumidification Outdoor air flow Power outlet Running current Power input Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Output Winding resistance(at 0:) Model Winding resistance(at 0:) Dimensions WOHOD Weight Sound level (High/Low) Fan speed (High/Low) Fan speed regulator Refrigerant filling capacity(r0a) Refrigeration oil (Model) m m m m kw R/h K /h A A W % A A A W " " mm kg db rpm kg cc Cooling 5. (.9-6.8), ,95 MXZ-A5VA Single phase 0V,50Hz to Max. 50 Max. 5 Refer to 9 Refer to SNB0FLDH (ROTARY),00 U-V 0.5 V-W 0.5 W-U 0.5 RC0J60-AA -WHT 5. WHT-RED 5. RED o70o0 57 6/ 650/ (NEO) Heating 6.8 (.6-9.0),70 6.9,55 8/7 60/50 Cooling 7. (.7-8.8),55 8.8,90 MXZ-A7VA Single phase 0V,50Hz to Max. 60 Max. 5 Refer to 9 Refer to SNB0FLDH (ROTARY),000 U-V 0.5 V-W 0.5 W-U 0.5 RC0J60-AA -WHT 5. WHT-RED 5. RED o70o0 58 8/5 650/ (NEO) Heating (.-9.0), ,950 50/8 700/50 NOTE: Test conditions are based on ISO 55 (Refrigerant piping length (one way) :5m) Refer to INDOOR/OUTDOOR CORRESPONDENCE TABLE for the combination. Measured under rated operating frequency. Electrical data is for only outdoor unit. These specifications are when all indoor units are operating. TEST CONDITIONS COOLING INDOOR DB7.0 C WB9.0 C OUTDOOR DB5.0 C WB.0 C HEATING INDOOR DB0.0 C OUTDOOR DB 7.0 C WB 6.0 C 5

26 Capacity System Electrical data Compressor Fan motor Special remarks Outdoor model Outdoor unit power supply Indoor units number Piping total length Connecting pipe length Height difference (Indoor ~ Outdoor) Height difference (Indoor ~ Indoor) Function Capacity [Rated (Min.-Max.) Hz] Dehumidification Outdoor air flow Power outlet Running current Power input Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Output Winding resistance(at 0:) Model Winding resistance(at 0:) Dimensions WOHOD Weight Sound level (High/Low) Fan speed (High/Low) Fan speed regulator Refrigerant filling capacity(r0a) Refrigerating oil (Model) m m m m kw R/h K /h A A W % A A A W " " mm kg db rpm kg cc Cooling (.7-9.),50 9.6,90 MXZ-A80VA Single phase 0V,50Hz to Max. 70 Max. 5 Refer to 9 Refer to TNB0FMCH (ROTARY),00 U-V. V-W. W-U. PM8H60-UA -WHT 5. WHT-RED 5. RED o900o0 (+5) 70 6/ 550/90 TEST CONDITIONS COOLING INDOOR DB7.0 C WB9.0 C OUTDOOR DB5.0 C WB.0 C HEATING INDOOR DB0.0 C OUTDOOR DB 7.0 C WB 6.0 C (NEO) Heating (.-.6),60 8.8,90 8/6 560/90 NOTE: Test conditions are based on ISO 55 (Refrigerant piping length (one way) :5m) Refer to INDOOR/OUTDOOR CORRESPONDENCE TABLE for the combination. Measured under rated operating frequency. Electrical data is for only outdoor unit. These specifications are when all indoor units are operating. 6

27 6 NOISE CRITERIA CURVES MXZ-A0VA FAN SPEED FUNCTION SPL(dB(A)) LINE MXZ-A5VA FAN SPEED FUNCTION SPL(dB(A)) LINE High Cooling 7 High Cooling 9 High Heating 8 High Heating OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = MICRO BAR NC-70 NC-60 NC-50 NC-0 NC-0 OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = MICRO BAR NC-70 NC-60 NC-50 NC-0 NC-0 0 APPROXIMATE 0 APPROXIMATE TERESHOLD OF TERESHOLD OF HEARING FOR NC-0 HEARING FOR NC-0 CONTINUOUS CONTINUOUS 0 NOISE NOISE BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz MXZ-A5VA FAN SPEED FUNCTION SPL(dB(A)) LINE MXZ-A7VA FAN SPEED FUNCTION SPL(dB(A)) LINE High Cooling 6 High Cooling 8 High Heating 8 High Heating OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = MICRO BAR NC-70 NC-60 NC-50 NC-0 NC-0 OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = MICRO BAR NC-70 NC-60 NC-50 NC-0 NC-0 0 APPROXIMATE TERESHOLD OF 0 APPROXIMATE TERESHOLD OF HEARING FOR NC-0 HEARING FOR NC-0 CONTINUOUS CONTINUOUS 0 NOISE NOISE BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz 7

28 MXZ-A80VA FAN SPEED FUNCTION SPL(dB(A)) LINE High High Cooling Heating OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = MICRO BAR NC-70 NC-60 NC-50 NC-0 NC APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz Test conditions. Cooling :Dry-bulb temperature 5: Wet-bulb temperature : Heating :Dry-bulb temperature 7: Wet-bulb temperature 6: NC-0 OUTDOOR UNIT m MICROPHONE 7 OUTLINES AND DIMENSIONS MXZ-A0VA MXZ-A5VA REQUIRED SPACE Basically open 00mm or more without any obstruction in front and on both sides of the unit. Unit: mm 00 Drainage hole [ 00mm or more 00mm or more Air in mm or more 50mm or more Air out 0 Open two sides of left, right, or rear side.. -0x Oval hole 85 handle Liquid pipe : [6.5(flared)/ Gas pipe : [9.5(flared)/8 Liquid pipe : [6.5(flared)/ Gas pipe : [9.5(flared)/8 B unit connection A unit connection

29 MXZ-A5VA Open as a rule More than 500 mm if the front and both sides are open Unit: mm 500 Air in Drainage holes -[ 88 Air in Air out O Oval hole More than 00 mm Open as a rule More than 500 mm if the back, both sides and top are open More than 50 mm More than 00 mm More than 00 mm if there are obstacles to both sides 80 0 Indoor and outdoor connect wiring 9O7 hole Gas pipe [9.5(flared)/8(A,B,C unit) 70 C unit connection B unit connection A unit connection. Liquid pipe [6.5(flared)/ MXZ-A7VA Open as a rule More than 500 mm if the front and both sides are open Unit: mm More than 00 mm More than 00 mm if there are obstacles to both sides Air in. 6.8 Air in Air out More than 00 mm Open as a rule More than 500 mm if the back, both sides and top are open More than 50 mm Drainage holes -[ -0O Oval hole 80 0 Indoor and outdoor connect wiring 9O7 hole Gas pipe 66. [9.5(flared)/8(B,C,D unit) [.7(flared)/(A unit) D unit connection C unit connection B unit connection 5 A unit connection. Liquid pipe [6.5(flared)/ 9

30 MXZ-A80VA Unit: mm Air in (00) (7) (6) -U-shape notched holes (Base bolt M0) Less than 5 (Base bolt length) Rubber cushion Air in Veranda Base 7 Air out Drainage holes -[ 0 (6) -O6 Oval hole (Base bolt M0) Gas pipe [9.5(flared)/8(B,C,D unit) [.7(flared)/(A unit) Indoor and outdoor connect wiring 6O5 hole D unit connection C unit connection B unit connection A unit connection 7.Installation space Note : Leave front and both sides clearance fully. More than 500 Liquid pipe [6.5(flared)/ More than 00 Note : Leave front and overhead clearance fully. More than 00.Service space More than 00 More than 500 More than More than More than 00 Note : Leave front, overhead and both sides clearance fully. More than 500 More than 500 More than 50 service space 0

31 8 WIRING DIAGRAM MXZ-A0VA MXZ-A5VA POWER SUPPLY ~/N 0V 50Hz CIRCUIT BREAKER N PE TB GRN/YLW BLU TO INDOOR UNIT No.B CONNECTING 0V~ S S L65 -V S TB TO INDOOR UNIT No.A CONNECTING 0V~ S S -V S TB ORN BLU RED TAB F6 CT6 X6 F6 TAB NF NR6 R6A R6B LDE POWER P.C. BOARD SSR6 CN9 CN9 CN60 CN98 CN60 INTERFACE P.C. BOARD L6 DB6 LD TAB C6A C6B C6C F80 BLU LD69 T80 DB65 S TR8 IC80 CN9 CN97 CN95 CN66 R8 INVERTER P.C. BOARD CN66 CN66 RT6 RT6 RT68 RT65 RT6 R6 R6 F90 P N P U V W IPM U N W V IC9 CT76 CT78 LDU LDV LDW C N9 CN9 WHT RED CN6 WHT RED W MC MF CN79 CN LEV A LEV B U V L BLU BLU GRN SYMBOL CT6,CT76,CT78 C6A,C6B,C6C DB6,DB65 NF F6 F6,F80,F90 IC80 IPM,IC9 L6,L65 NAME CURRENT TRANSFORMER SMOOTHING CAPACITOR DIODE MODULE NOISE FILTER FUSE (T0AL50V) FUSE (T.5AL50V) INTELLIGENT POWER DEVICE INTELLIGENT POWER MODULE REACTOR CN96 LED LED SW DISPLAY P.C. BOARD SYMBOL NAME MC MF NR6 RT6 RT6 RT6 RT65 RT68 COMPRESSOR OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR DISCHARGE TEMPERATOR THERMISTOR FIN TEMPERATOR THERMISTOR AMBIENT TEMPERATOR THERMISTOR OUTDOOR HEAT EXCHANGER TEMPERATURE THERMISTOR SYMBOL NAME R6,R6,R8 R6A,R6B TB,TB,TB TR8 T80 X6 S LEV A,LEV B SSR6 CURRENT-DETECTING RESISTOR RESISTOR TERMINAL BLOCK SWITCHING POWER TRANSISTOR SWITCHING TRANS RELAY R.V. COIL EXPANSION VALVE SOLENOID COIL RELAY NOTES:.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing..use copper conductors only (for field wiring)..symbols below indicate. :Terminal block :Connector 7

32 MXZ-A5VA PFC V CT U MC U W CB CB CB IPM V WHT CT RED RS RS W RS RS RED WHT RT6 LD LD LD9 GRN CN CN9 MF RED BRN BLU ORN YLW WHT 5 CN L T80 X6 R RED R97A F6 S YLW WHT TAB CN80 F80 R97B HC90 CN9 WHT RED YLW BLU ORN PNK GRY LEV NOISE FILTER P.C. BOARD TB GRN/YLW PE TAB R6B E GROUND R6A N/F BLU TAB L N CN5 NR6 N CN90 CT6 CIRCUIT BREAKER POWER SUPPLY ~/N 0V~ 50Hz CN CN90 CN6 SSR6 F CN90 5 POWER BOARD NOTES:.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing..use copper conductors only (for field wiring)..symbols below indicate. :Terminal block :Connector CN9 BLU LDE CN LDE BLU BLU GRN GRN S S S S -V TO INDOOR UNIT No.C CONNECTING YLW 6 7 CN70 5 CN70 5 CN78 CN60 CN60 BLU 0V~ TB ORN BLU S S S -V TO INDOOR UNIT No.B CONNECTING ELECTRONIC CONTROL P.C. BOARD 5 CN60 RED BLU 0V~ TB (BLU) (RED) (WHT) CN66 CN CN CN CN CN S S S -V TO INDOOR UNIT No.A CONNECTING 0V~ GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY WHT YLW ORN BLU BRN RED BRN BLU ORN YLW WHT RED BRN BLU ORN YLW WHT RED TB RT6A RT6C RT6 RT68 RT65 LEV A LEV B LEV C RT6B RT6 SYMBOL NAME RT6 FIN TEMPERATOR THERMISTOR RT65 AMBIENT TEMPERATOR THERMISTOR SYMBOL NAME OUTDOOR FAN MOTOR MC COMPRESSOR MF OUTDOOR HEAT EXCHANGER TEMPERATURE THERMISTOR RT68 SOLENOID COIL RELAY T80 TRANSFORMER SSR6 NOISE FILTER POWER FACTOR CONTROLLER NR6 VARISTOR N/F PFC R6A,B RESISTOR SYMBOL NAME CB~ SMOOTHING CAPACITOR CT, CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F80 FUSE (T.5AL50V) F9 F6 HC90 INTELLIGENT POWER MODULE FUSE (TAL50V) FUSE (TAL50V) TB~ TERMINAL BLOCK X6 RELAY S R.V. COIL R97A, B RESISTOR RS~ RESISTOR RT6A~C GAS PIPE TEMPERATOR THERMISTOR RT6 DEFROST THERMISTOR IPM INTELLIGENT POWER MODULE L REACTOR LEV A~C EXPANSION VALVE DISCHARGE TEMPERATOR THERMISTOR RT6 EXPANSION VALVE LEV E

33 MXZ-A7VA V POWER BOARD PFC NOISE FILTER P.C. BOARD L MC CT X6 W U R RED U TB CB CB CB GRN/YLW F6 TAB PE GROUND S YLW WHT TAB R6B R6A N/F WHT BLU IPM TAB L N V CN5 CN90 NR6 N CT6 CIRCUIT BREAKER POWER SUPPLY ~/N 0V~ 50Hz CT RED CN CN90 CN6 W RS RS BLU SSR6 F9 RS RS CN90 S S S -V TO INDOOR UNIT No.D CONNECTING CN9 BLU 0V~ 5 TB5 LDE LDE RT6 CN LD9 LD LD CN BLU BLU GRN GRN CN60 BRN GRN WHT RED S S S S -V TO INDOOR UNIT No.C CONNECTING YLW CN60 BLU 0V~ TB CN CN70 5 CN70 5 CN78 HC90 CN9 CN60 ORN F80 WHT RED T80 S S S -V TO INDOOR UNIT No.B CONNECTING 5 RED R97A ELECTRONIC CONTROL P.C. BOARD BLU 0V~ 5 CN60 MF BLU TB YLW BLU ORN PNK GRY R97B (GRN) (BLU) (RED) (WHT) 6 5 CN795 CN66 CN CN CN CN CN CN S S S -V TO INDOOR UNIT No.A CONNECTING 0V~ RED BRN BLU ORN YLW WHT GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY WHT YLW ORN BLU BRN RED WHT YLW ORN BLU BRN RED RED BRN BLU ORN YLW WHT RED BRN BLU ORN YLW WHT TB CN9 E LEV RT65 RT68 RT6 RT6 RT6D RT6C RT6B RT6A D LEV C LEV LEV B LEV A.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing..use copper conductors only (for field wiring)..symbols below indicate. :Terminal block :Connector NOTES: SYMBOL NAME RT6 FIN TEMPERATOR THERMISTOR RT65 AMBIENT TEMPERATOR THERMISTOR SYMBOL NAME OUTDOOR FAN MOTOR MC COMPRESSOR MF OUTDOOR HEAT EXCHANGER TEMPERATURE THERMISTOR RT68 SOLENOID COIL RELAY T80 TRANSFORMER SSR6 NOISE FILTER POWER FACTOR CONTROLLER NR6 VARISTOR N/F PFC R6A,B RESISTOR SYMBOL NAME CB~ SMOOTHING CAPACITOR CT, CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F80 FUSE (T.5AL50V) F9 F6 HC90 INTELLIGENT POWER MODULE FUSE (TAL50V) FUSE (TAL50V) TB~5 TERMINAL BLOCK X6 RELAY S R.V. COIL R97A, B RESISTOR RS~ RESISTOR RT6A~D GAS PIPE TEMPERATOR THERMISTOR RT6 DEFROST THERMISTOR IPM INTELLIGENT POWER MODULE L REACTOR LEV A~D EXPANSION VALVE DISCHARGE TEMPERATOR THERMISTOR RT6 EXPANSION VALVE LEV E

34 MXZ-A80VA POWER BOARD PFC NOISE FILTER P.C. BOARD V L GRN/YLW MC X6 U CT R RED W U CB CB CB POWER SUPPLY ~/N 0V~ 50Hz TB PE F6 S YLW WHT TAB TAB R6B R6A L N/F WHT BLU N IPM CN90 NR6 TAB V CN5 N CIRCUIT BREAKER CT6 CT RED CN90 CN6 BLU -V W RS RS CN TB S S S TO INDOOR UNIT No.D CONNECTING 5 F9 SSR6 0V~ 6 RS RS 7 CN90 5 CN9 BRN RT6 CN60 YLW TB ORN BLU BLU BLU S S S -V CN LD LD CN LDE LDE LD9 TO INDOOR UNIT No.C CONNECTING BLU BLU GRN GRN GRN 0V~ WHT RED S -V CN80 CN70 F CN70 5 CN78 HC90 TB S S S 0V~ CN9 WHT RED T80 R97A ELECTRONIC CONTROL P.C. BOARD 5 CN60 CN60 CN60 TO INDOOR UNIT No.B CONNECTING RED BLU -V MF R97B TB5 S S S TO INDOOR UNIT No.A CONNECTING YLW BLU ORN PNK GRY 0V~ CN795 CN66 CN66 CN66 CN68 (WHT) (RED) (BLU) (GRN) CN79 CN79 CN79 CN WHT YLW ORN BLU BRN RED GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY GRY RED RED RED BRN BLU ORN YLW WHT RED BRN BLU ORN YLW WHT WHT YLW ORN BLU BRN RED WHT YLW ORN BLU BRN RED CN9 HPS RT6A RT6C RT6 RT68 RT65 LEV A LEV B LEV C LEV D RT6B RT6D RT6 LEV E.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing..use copper conductors only (for field wiring)..symbols below indicate. :Terminal block :Connector NOTES: SYMBOL NAME RT6 DISCHARGE TEMPERATURE THERMISTOR RT6 FIN TEMPERATURE THERMISTOR RT65 AMBIENT TEMPERATURE THERMISTOR SYMBOL NAME LEV E EXPANSION VALVE OUTDOOR FAN MOTOR MC COMPRESSOR MF OUTDOOR HEAT EXCHANGER TEMPERATURE THERMISTOR RT68 NOISE FILTER POWER FACTOR CONTROLLER NR6 VARISTOR N/F PFC R6A,B RESISTOR SYMBOL NAME CB~ SMOOTHING CAPACITOR CT, CURRENT TRANSFORMER CT6 CURRENT TRANSFORMER F80 FUSE (T.5AL50V) F9 SOLENOID COIL RELAY T80 TRANSFORMER SSR6 F6 HC90 INTELLIGENT POWER MODULE FUSE (TAL50V) FUSE (TAL50V) TB~5 TERMINAL BLOCK X6 RELAY S R.V. COIL R97A, B RESISTOR RS~ RESISTOR RT6A~D GAS PIPE TEMPERATURE THERMISTOR RT6 DEFROST THERMISTOR HPS HIGH PRESSURE SWITCH IPM INTELLIGENT POWER MODULE L REACTOR LEV A~D EXPANSION VALVE

35 9 REFRIGERANT SYSTEM DIAGRAM MXZ-A0VA MXZ-A5VA Unit:mm R.V. coil OFF ON Refrigerant flow in cooling Refrigerant flow in heating Compressor Discharge temperature thermistor RT6 Muffler [ Indoor unit B [9.5 Stop valve (with service port) -way valve [ Indoor unit A [9.5 Stop valve (with service port) [ [ Outdoor heat exchanger temperature thermistor RT68 FAN-OUT Indoor unit A Capillary tube [.0 [.0 00 Stop valve (with strainer #00) LEV A [6 HEX-OUT Strainer #00 Distributor Ambient temperature thermistor RT65 Defrost thermistor RT6 Capillary tube [.0 [. 600 ( pcs) [9.5 Indoor unit B Capillary tube [.0 [.0 00 Stop valve (with strainer #00) [6 LEV B MAX REFRIGERANT PIPING LENGTH Piping length each indoor unit (a, b) 0m Total piping length (a+b) 0m Bending point for each unit 0 Total bending point 0 Indoor units a Outdoor unit 5m It does not matter which unit is higher. 5m Outdoor unit precharged,00 Refrigerant piping length (one way, unit total) 0m 0 0m 00 b 0m Calculation : Xg=0g/mx(Refrigerant piping length(m)-0) Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the tables below. When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. class /5/5 Indoor unit Pipe diameter Extension pipe diameter Liquid 6.5(/) Liquid 6.5(/) Gas 9.5(/8) Gas 9.5(/8) Unit : mm (inch) Outdoor unit union diameter For Liquid 6.5(/) Indoor unit A Gas 9.5(/8) Liquid 6.5(/) Indoor unit B Gas 9.5(/8) 5

36 MXZ-A5VA Unit:mm R.V. coil OFF ON Indoor unit C Indoor unit B Indoor unit A Refrigerant flow in cooling Refrigerant flow in heating Unit C gas pipe temperature thermistor [9.5 Unit B gas pipe temperature thermistor [9.5 Unit A gas pipe temperature thermistor [9.5 Compressor Discharge temperature thermistor RT6 Oil separator Ball valve with service port [ Muffler Capillary tube [.5 [ way valve [6 [6 [6 Outdoor heat exchanger temperature thermistor RT68 HEX-OUT FAN-OUT Ambient temperature thermistor RT65 Indoor unit A Indoor unit B Indoor unit C Capillary tube [.0 [.8 00 Strainer LEV A [6.5 #00 Capillary tube [.0 [.8 00 Strainer #00 Capillary tube [.0 [.8 00 Strainer #00 [6.5 LEV B [6.5 LEV C Ball valve Strainer #00 Power receiver LEV E [9.5 Strainer #00 Distributor Defrost thermistor RT6 Capillary tube [.6 [. 500 (8 pcs) MAX REFRIGERANT PIPING LENGTH Piping length each indoor unit (a, b, c) 5m Total piping length (a+b+c) 50m Bending point for each unit 5 Total bending point 50 Indoor units a b Outdoor unit 5m It does not matter which unit is higher. 5m Outdoor unit precharged,700 Refrigerant piping length (one way, unit total) 0m 0 50m 00 c 0m Calculation : Xg=0g/mx(Refrigerant piping length(m)-0) Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the tables below. When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further information on Different-diameter pipe,see 6-. Unit : mm (inch) class /5/5 50 Indoor unit Extension pipe diameter Pipe diameter Liquid 6.5(/) Liquid 6.5(/) Gas 9.5(/8) Gas 9.5(/8) Liquid 6.5(/) Liquid 6.5(/) Gas.7(/) Gas.7(/) Outdoor unit union diameter For Liquid 6.5(/) Indoor unit A Gas 9.5(/8) Liquid 6.5(/) Indoor unit B Gas 9.5(/8) Liquid 6.5(/) Indoor unit C Gas 9.5(/8) 6

37 MXZ-A7VA Indoor unit D Indoor unit C Indoor unit B Indoor unit A R.V. coil OFF ON Refrigerant flow in cooling Refrigerant flow in heating Unit D gas pipe temperature thermistor [9.5 Unit C gas pipe temperature thermistor [9.5 Unit B gas pipe temperature thermistor [9.5 Unit A gas pipe temperature thermistor [.7 Ball valve with service port [ Oil separator Muffler Compressor Discharge temperature thermistor RT6 Capillary tube [.5 [ way valve [6 [6 [6 Outdoor heat exchanger temperature thermistor RT68 [ FAN-OUT Unit:mm HEX-OUT Ambient temperature thermistor RT65 Indoor unit A Indoor unit B Indoor unit C Indoor unit D Strainer #00 Strainer #00 Strainer #00 Strainer #00 Capillary tube [.0 [.8 00 LEV A [6.5 [6.5 LEV B [6.5 LEV C [6.5 LEV D Ball valve Strainer #00 Power receiver LEV E [9.5 Strainer #00 Distributor Defrost thermistor RT6 Capillary tube [.6 [. 500 (8 pcs) MAX REFRIGERANT PIPING LENGTH Piping length each indoor unit (a, b, c, d) 5m Total piping length (a+b+c+d) 60m Bending point for each unit 5 Total bending point 60 Indoor units a b Outdoor unit 5m It does not matter which unit is higher. Outdoor unit precharged,700 Refrigerant piping length (one way, unit total) 0m 0 50m 00 60m 00 c d 0m 5m Calculation : Xg=0g/mx(Refrigerant piping length(m)-0) Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the tables below. When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further information on Different-diameter pipe,see 6-. Unit : mm (inch) Indoor unit Outdoor unit union diameter Extension pipe diameter class Pipe diameter For Liquid 6.5(/) Liquid 6.5(/) Liquid 6.5(/) /5/5 Indoor unit A Gas 9.5(/8) Gas 9.5(/8) Gas.7(/) Liquid 6.5(/) Liquid 6.5(/) Liquid 6.5(/) 50 Indoor unit B Gas.7(/) Gas.7(/) Gas 9.5(/8) Liquid 6.5(/) Liquid 6.5(/) Liquid 6.5(/) 60 Indoor unit C Gas 5.88(5/8) Gas 5.88(5/8) Gas 9.5(/8) Liquid 6.5(/) Indoor unit D Gas 9.5(/8) 7

38 MXZ-A80VA Indoor unit D Indoor unit C Indoor unit B Indoor unit A R.V. coil OFF ON Unit D gas pipe temperature thermistor Unit C gas pipe temperature thermistor Unit B gas pipe temperature thermistor [9.5 Unit A gas pipe temperature thermistor [.7 Indoor unit A Indoor unit B Indoor unit C Indoor unit D Refrigerant flow in cooling Refrigerant flow in heating Strainer #00 Strainer #00 Strainer #00 Strainer #00 [9.5 [9.5 LEV A [6.5 [6.5 LEV B [6.5 LEV C [6.5 LEV D High-pressure switch Oil separator Ball valve with service port [6 Capillary tube [.0 [.8 90 Muffler Ball valve Distributor Compressor Capillary tube [.5 [ Strainer #00 Discharge temperature thermistor RT6 -way valve [6 Power receiver [6 [6 LEV E [9.5 [6 Strainer #00 Outdoor heat exchanger Outdoor heat exchanger temperature thermistor RT68 Defrost thermistor RT6 Capillary tube [.0 [. 00 Distributor Unit:mm Ambient temperature thermistor RT65 MAX REFRIGERANT PIPING LENGTH Piping length each indoor unit (a, b, c, d) 5m Total piping length (a+b+c+d) 70m Height difference between units (H) 0m Bending point for each unit 5 Total bending point 70 It does not matter which unit is higher. Outdoor unit Refrigerant piping length (one way, unit total) precharged 0m 50m 60m 70m, Indoor units c d a b Outdoor unit H H H Calculation : Xg=0g/mx(Refrigerant piping length(m)-0) Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the tables below. When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further information on Different-diameter pipe,see 6-. Unit : mm (inch) Indoor unit Outdoor unit union diameter Extension pipe diameter class Pipe diameter For Liquid 6.5(/) Liquid 6.5(/) Liquid 6.5(/) /5/5 Indoor unit A Gas 9.5(/8) Gas 9.5(/8) Gas.7(/) Liquid 6.5(/) Liquid 6.5(/) Liquid 6.5(/) 50 Indoor unit B Gas.7(/) Gas.7(/) Gas 9.5(/8) Liquid 6.5(/) Liquid 6.5(/) Liquid 6.5(/) 60 Indoor unit C Gas 5.88(5/8) Gas 5.88(5/8) Gas 9.5(/8) Liquid 9.5(/8) Liquid 9.5(/8) Liquid 6.5(/) 7 Indoor unit D Gas 5.88(5/8) Gas 5.88(5/8) Gas 9.5(/8) 8

39 0 PERFORMANCE CURVES MXZ-A0VA MXZ-A5VA MXZ-A5VA MXZ-A7VA MXZ-A80VA The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions, since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. () GUARANTEED VOLTAGE 98~6V () AIR FLOW Air flow should be set at MAX. () MAIN READINGS () Indoor intake air wet-bulb temperature : CWB () Indoor outlet air wet-bulb temperature : CWB () Outdoor intake air dry-bulb temperature : CDB () Total input: W (5) Indoor intake air dry-bulb temperature : CDB (6) Outdoor intake air wet-bulb temperature : CWB (7) Total input : W Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service. How to measure the indoor air wet-bulb/dry-bulb temperature difference. Attach at least sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least sets of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.. Attach at least sets of wet-and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.. Check that the air filter is cleaned.. Open windows and doors of room. 5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL (HEAT) MODE. 6. When system stabilizes after more than 5 minutes, measure temperature and take an average temperature minutes later, measure temperature again and check that the temperature does not change. } } Cooling Heating INDOOR UNIT OUTDOOR UNIT Wet and dry-bulb thermometers Wet-and dry-bulb thermometers 9

40 0-. Capacity and the input curves MXZ-A0VA MXZ-A5VA class 5 class 5 class class 5 class 5 class 0

41 MXZ-A5VA MXZ-A7VA class 5 class 5 class 50 class 60 class class 5 class 5 class 50 class 60 class MXZ-A80VA class 5 class 5 class 50 class 60 class 7 class class 5 class 5 class 50 class 60 class 7 class

42 0-. Capacity and input correction by inverter output frequency (OUTDOOR UNIT:MXZ-A0VA/A5VA). -class unit in single operation.5 <COOL>Capacity.5 <COOL>Total input.5 <HEAT>Capacity.5 <HEAT>Total input Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity Hz <HEAT>Total input Hz Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz

43 (OUTDOOR UNIT:MXZ-A5VA). -class unit in single operation <COOL>Capacity.5.5 <COOL>Total input.5 <HEAT>Capacity.5 <HEAT>Total input Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity Hz <HEAT>Total input Hz Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz. 50-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz

44 (OUTDOOR UNIT:MXZ-A7VA). -class unit in single operation <COOL>Capacity.5.5 <COOL>Total input.5 <HEAT>Capacity.5 <HEAT>Total input Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity Hz <HEAT>Total input Hz Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz. 50-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz

45 (OUTDOOR UNIT:MXZ-A80VA). -class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity.5 <HEAT>Total input Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity Hz <HEAT>Total input Hz Hz Hz Hz. 5-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz. 50-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Hz Hz Hz Hz 5

46 6. 7-class unit in single operation <COOL>Capacity.5.5 <COOL>Total input.5 <HEAT>Capacity.5 <HEAT>Total input Hz Hz Hz Hz 0-. Test run operation (How to operate fixed-frequency operation). Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT : Press twice).. Test run operation starts and continues to operate for 0 minutes.. Compressor operates at rated frequency.. Indoor fan operates at High speed. 5. After 0 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor varies). 6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on remote controller. 0-. Outdoor low pressure and outdoor unit current (single operation) NOTE:The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is : (MPa[Gauge]) =0.(kgf/f[Gauge]) () COOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Operation : TEST RUN OPERATION (refer to 0-.) MXZ-A0VA MXZ-A5VA -class unit (kgf/f[gauge])(mpa[gauge]) Outdoor low pressure Hz Ambient temperature(:) Ambient humidity(%) 5-class unit Outdoor unit current (A) (:) (%) 0Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Outdoor low pressure Dry-bulb temperature(:) Relative humidity(%) class unit (kgf/f[gauge])(mpa[gauge]) Hz Ambient temperature(:) Ambient humidity(%) Outdoor unit current (A) (:) (%) 0Hz Ambient temperature(:) Ambient humidity(%) (:) (%) (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 0Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) 6

47 MXZ-A5VA MXZ-A7VA -class unit 5-class unit (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 0Hz (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 0Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) 5-class unit 50-class unit (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 0Hz (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 0Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) MXZ-A7VA 60-class unit (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 0Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) 7

48 MXZ-A80VA -class unit 5-class unit (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 Hz (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) 5-class unit 50-class unit (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 Hz (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) 60-class unit 7-class unit (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 Hz (kgf/f[gauge])(mpa[gauge]). Outdoor low pressure Hz Outdoor unit current (A) 5 Hz Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) Ambient temperature(:) Ambient humidity(%) (:) (%) HEAT operation Condition : Dry bulb temperature ( C) Wet bulb temperature ( C) Indoor Outdoor Operation : TEST RUN OPERATION (refer to 0-.) MXZ-A0VA -class unit MXZ-A5VA 5-class unit 5-class unit Outdoor unit current (A) 5Hz Outdoor unit current (A) 5Hz Outdoor unit current (A) 5Hz Ambient temperature(:) Ambient temperature(:) Ambient temperature(:) 8

49 MXZ-A5VA MXZ-A7VA -class unit 5-class unit 5-class unit 50-class unit Outdoor unit current (A) 6 5 8Hz Outdoor unit current (A) 6 5 8Hz Outdoor unit current (A) 6 5 8Hz Outdoor unit current (A) 6 5 8Hz Ambient temperature(:) Ambient temperature(:) Ambient temperature(:) Ambient temperature(:) MXZ-A7VA 60-class unit 7 Outdoor unit current (A) 6 5 8Hz Ambient temperature(:) MXZ-A80VA -class unit 5-class unit 5-class unit 50-class unit Outdoor unit current (A) 6 5 Hz Outdoor unit current (A) 6 5 Hz Outdoor unit current (A) 6 5 Hz Outdoor unit current (A) 6 5 Hz Ambient temperature(:) Ambient temperature(:) Ambient temperature(:) Ambient temperature(:) 60-class unit 7 7-class unit 7 Outdoor unit current (A) 6 5 Hz Outdoor unit current (A) 6 5 Hz Ambient temperature(:) Ambient temperature(:) 9

50 ACTUATOR CONTROL MXZ-A0VA MXZ-A5VA MXZ-A5VA MXZ-A7VA MXZ-A80VA Relation between main sensor and actuator Sensor Discharge temperature thermistor Purpose Protection Compressor LEV Actuator Outdoor fan motor Reversing valve Indoor pipe temperature thermistor Defrosting Protection Defrost thermistor Defrosting Gas pipe temperature thermistor (MXZ-A5/A7/A80VA) Control Fin temperature thermistor Protection Ambient temperature thermistor Control Outdoor heat exchanger temperature Protection Capacity code Control SERVICE FUNCTIONS MXZ-A0VA MXZ-A5VA MXZ-A5VA MXZ-A7VA MXZ-A80VA -. Locking the operation mode of the conditioner ( COOL, DRY, HEAT) Description of the function: With this function, you can lock the operation mode of the outdoor unit. Once the operation mode is locked to either COOL/DRY mode or HEA Tmode, the air conditioner operates in that mode only. ON Initial setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it. MXZ-A0/A5 [How to lock the operation mode] Be sure to turn off the main power for the air conditioner before making the setting. Set the nd Dip Switch of SW on the display P.C. board or the outdoor electronic control P.C. board to ON to enable this function. To lock the operation mode in COOL/DRY mode, set the st Dip Switch of SW on the display P.C. board or the outdoor electronic control P.C.board to OFF. To lock the operation in HEAT mode, set the same switch to ON. Turn on the main power for the air conditioner. ON COOL/DRY ON HEAT MXZ-A5/A7/A80 -. Lowering the operating noise of the outdoor unit Description of the function: With this function, you can lower the operating noise of the outdoor unit when the operation load is small, for example, during nighttime in COOL mode. However, please note that the cooling and heating capacity can also be lowered if this function is activated. Initial setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it. [How to lower the operating noise] Be sure to turn off the main power for the air conditioner before making the setting. Lower the operating Set the rd Dip Switch of SW on the display P.C. board or noise the outdoor electronic control P.C. board to ON to enable this function. Turn on the main power for the air conditioner. 50 ON

51 -. AUTO LINE CORRECTING function (MXZ-A) This outdoor model has an auto line correcting function which automatically detects incorrect wiring or piping as shown in the following pictures, and interchanges the wiring lines (A to B/B to A) with the software. Only one indoor unit has to be performed cooling operation for 0 minutes to complete the detection. However, this function be may not work due to the condition of the unit, or the environment. For example, - gas leak, closed stop valve - unit failure such as defective LEV - indoor/outdoor temperature <Correct line> A Refrigerant piping Indoor/outdoor connecting wire B INDOOR UNIT A A B OUTDOOR UNIT INDOOR UNIT B <Incorrect wiring> A B INDOOR UNIT A A B OUTDOOR UNIT INDOOR UNIT B 5

52 <Incorrect piping> A B INDOOR UNIT A A B OUTDOOR UNIT INDOOR UNIT B The auto line correcting can be confirmed in the following way: Turn OFF the power supply. Turn ON the th Dip Switch of SW on the display P.C. board. Turn ON the power supply. Confirm the interchange by the blinking of LED. Number of blinks LED(Red) Once times LED(Yellow) Once times Wiring line not interchanged interchanged 5 Turn OFF the power supply after the confirmation, and turn OFF the th Dip Switch of SW on the diplay P.C. board. 6 Turn ON the power supply. NOTE: This function does not work when the jumper wire JGO on the inverter P.C. board is cut. ON AUTO LINE CORRECTING 5

53 TROUBLESHOOTING MXZ-A0VA MXZ-A5VA MXZ-A5VA MXZ-A7VA MXZ-A80VA -. Cautions on troubleshooting. Before troubleshooting, check the following: ) Check the power supply voltage. ) Check the indoor/outdoor connecting wire for mis-wiring.. Take care the following during servicing. ) Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug. ) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board. ) When removing the electrical parts, be careful to the residual voltage of smoothing capacitor. ) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components. 5) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wiring Housing point. Troubleshooting procedure ) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. ) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration. ) When troubleshooting, refer to -., and -. and Failure mode recall function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (-.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which doesn t recur.. Type of failure mode recall function There are types in failure mode recall function as shown below. Indoor and outdoor unit failure mode recall function With this function, failure mode of indoor unit and a part of failure mode of outdoor unit can be recalled. The details of outdoor unit failure mode recall function With this function, more detailed failure mode of outdoor unit can be recalled. Refer to the service manual of indoor unit for how to recall the failure mode and the details of indoor unit failure mode. The outdoor unit failure mode is indicated by the operation indicator lamp on the indoor unit and the LED of outdoor unit. See "-.. Failure mode table". 5

54 . Outdoor unit failure mode table MXZ-A The left lamp of OPERATION INDICAOR lamp(indoor unit) OFF -time flash -time flash -time flash 5-time flash 6-time flash 7-time flash Abnormal point (Failure mode / protection) None(Normal) Outdoor power system Discharge temperature thermistor Defrost thermistor Ambient temperature thermistor Fin temperature thermistor P.C. board temperature thermistor Outdoor heat exchanger temperature thermistor Over current Compressor Discharge temperature High pressure Fin temperature P.C. board temperature LED indication (Outdoor P.C. board) LED LED - - Lighting Lighting Lighting Lighting Lighting Once Once Twice Lighting times Lighting times Lighting 9 times Once Twice 9 times Goes out Goes out Goes out Lighting Lighting Lighting Lighting times Goes out times Goes out Condition When over current protection stop is continuously performed three times within minute after the compressor gets started, or when converter protection stop or bus-bar voltage protection stop is continuously performed three times within minutes after start-up. When thermistor shorts or opens during compressor running. When 8A current flow into intelligent power module. The possibility of intercepting the overcurrent by the compressor lock is high. The compressor doesn't synchronize with the operating power. When discharge temperature exceeds 6: during operation. Compressor can restart if discharge temperature thermistor reads 00: or less minutes later. When the outdoor heat exchanger temperature exceeds 70: during cooling or the indoor gas pipe temperature exceeds 70: during heating. When the fin temperature exceeds 87: during operation. When the P.C. board temperature exceeds 70: during operation. Correspondence Check the connection of the compressor connecting wire. Refer to -.E "How to check inverter / compressor". Check the stop valve. Refer to -6.F "Check of outdoor thermistors". Replace the outdoor electronic control P.C. board. Refer to -6.F "Check of outdoor thermistors". Reconnect compressor connector. Refer to -6.E "How to check inverter/ compressor". Check the stop valve. Check the connection of the compressor connecting wire. Refer to -6.E "How to check inverter/ compressor". Check refrigerant circuit and refrigerant amount. Refer to -6.D "Check of LEV". Check refrigerant circuit and refrigerant amount. Check the stop valve. Check around outdoor unit. Check outdoot unit air passage. Refer to -6.G "Check of outdoor fan motor". Indoor/outdoor unit failure mode recall function 8-time flash Outdoor fan motor Lighting Lighting When failure occurs continuously three times within 0 seconds after the fan gets started. Refer to -6.G "Check of outdoor fan motor". 9-time flash 0-time flash Nonvolatile memory data Discharge temperature Lighting 5 times Lighting Lighting When nonvolatile memory data cannot be read properly. When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 9: for more than 0 minutes. Replace the outdoor electronic control P.C. board. Check refrigerant circuit and refrigerant amount. Refer to -6.D "Check of LEV". NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (-.). 5

55 The left lamp of OPERATION INDICATOR lamp(indoor unit) -time flash -time flash Abnormal point (Failure mode / protection) Current sensor Bus-bar voltage Power module LED indication (Outdoor P.C. board) LED LED 8 times Goes out 6 times Goes out 7 times Goes out Condition When a short or open circuit is detected in the current sensor during compressor operating. When the bus-bar voltage exceeds 0V or falls to 50V or below during compressor operating. There is a high possibility that the power module is out of order. Correspondence Replace the power board. Replace the power board. Refer to -6.E "How to check inverter/ compressor". Indoor/outdoor unit failure mode recall function 5-time flash LEV for drain Lighting Lighting When the indoor unit detectes any abnormal in the LEV for drain. Refer to -6.D "Check of LEV". Check the drain pump of the indoor unit. NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (-.). 55

56 MXZ-A/A The left lamp of OPERATION INDICAOR lamp(indoor unit) OFF -time flash -time flash -time flash 5-time flash 6-time flash 7-time flash Abnormal point (Failure mode / protection) None(Normal) Outdoor power system Discharge temperature thermistor Defrost thermistor Ambient temperature thermistor Fin temperature thermistor P.C. board temperature thermistor Outdoor heat exchanger temperature thermistor Gas pipe temperature thermistor A Gas pipe temperature thermistor B Gas pipe temperature thermistor C Gas pipe temperature thermistor D Over current Discharge temperature High pressure Fin temperature P.C. board temperature LED indication (Outdoor P.C. board) LED LED - - Lighting Lighting Lighting Lighting Lighting Once Once Twice Lighting times Lighting times Lighting 9 times Lighting 0 times Lighting times Lighting times Lighting times Once Goes out Lighting Lighting Lighting Lighting times Goes out times Goes out Condition When over current protection stop is continuously performed three times within minute after the compressor gets started, or when converter protection stop or bus-bar voltage protection stop is continuously performed three times within minutes after start-up. When thermistor shorts or opens during compressor running. When a short or open circuit is detected in the thermistor during cooling. (A,B,C : MXZ-A5/A7/A80) (D : MXZ-A7/A80) When 8A current flow into intelligent power module. When discharge temperature exceeds 6: during operation. Compressor can restart if discharge temperature thermistor reads 00: or less minutes later. When high-pressure is detected with the high-pressure switch (HPS) during operation.(mxz-a80) When the outdoor heat exchanger temperature exceeds 70: during cooling or the indoor gas pipe temperature exceeds 70: during heating. When the fin temperature exceeds 87: during operation. When the P.C. board temperature exceeds 70: during operation. Correspondence Check the connection of the compressor connecting wire. Refer to -.E "How to check inverter / compressor". Check the stop valve. Refer to -6.F "Check of outdoor thermistors". Replace the outdoor electronic control P.C. board. Refer to -6.F "Check of outdoor thermistors". Reconnect compressor connector. Refer to -6.E "How to check inverter/ compressor". Check the stop valve. Check refrigerant circuit and refrigerant amount. Refer to -6.D "Check of LEV". Check refrigerant circuit and refrigerant amount. Check the stop valve. Check around outdoor unit. Check outdoot unit air passage. Refer to -6.G "Check of outdoor fan motor". Indoor/outdoor unit failure mode recall function 8-time flash Outdoor fan motor Lighting Lighting When failure occurs continuously three times within 0 seconds after the fan gets started. Refer to -6.G "Check of outdoor fan motor". 9-time flash 0-time flash Nonvolatile memory data Discharge temperature Lighting 5 times Lighting Lighting When nonvolatile memory data cannot be read properly. When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 9: for more than 0 minutes. Replace the outdoor electronic control P.C. board. Check refrigerant circuit and refrigerant amount. Refer to -6.D "Check of LEV". NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (-.). 56

57 The left lamp of OPERATION INDICATOR lamp(indoor unit) -time flash Abnormal point (Failure mode / protection) Communication error between P.C. boards (MXZ-A5/A7/A80) LED indication (Outdoor P.C. board) LED LED Lighting 6 times Condition Communication error occurs between the electronic control P.C. board and power board for more than 0 seconds. When the communication between boards protection stop is continuously performed twice. Correspondence Check the connecting wire between outdoor electronic control P.C. board and power board. Indoor/outdoor unit failure mode recall function Current sensor Zero cross detecting circuit Converter Bus-bar voltage () Bus-bar voltage () weven if this protection stop is performed continuously three times, it does not mean the abnormality in outdoor power system. Lighting 7 times 5 times Goes out 5 times Goes out 5 times 6 times Goes out Goes out When a short or open circuit is detected in the current sensor during compressor operating. Current sensor protection stop is continuously performed twice. When zero cross signal cannot be detected while the compressor is operating. The protection stop of the zero cross detecting circuit is continuously performed 0 times. When a failure is detected in the operation of the converter during operation. When the bus-bar voltage exceeds 00V or falls to 00V or below during compressor operating. When the bus-bar voltage exceeds 00V or falls to 50V or below during compressor operating. Replace the power board. Check the connecting wire among electronic control P.C. board, noise filter P.C. board and power board. Replace the power board. 5-time flash LEV for drain Lighting Lighting When the indoor unit detectes any abnormal in the LEV for drain. Refer to -6.D "Check of LEV". Check the drain pump of the indoor unit. NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (-.). -. Instruction of troubleshooting Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit. Then, check the outdoor unit with referring to this page. Operation start Check the outdoor unit LED indicator. OFF Refer to -6. A "Check of power supply". Both LED and LED lighting LED or LED has blinked. Refer to -. Troubleshooting check table. Indoor unit serial signal error Refer to -6. B "How to check mis-wiring and serial signal error". COOL or HEAT operation only Refer to -6. C "Check of R.V. coil". When cooling, heat exchanger of non-operating indoor unit frosts. When heating, nonoperating indoor unit gets warm. Refer to -6. D "Check of LEV". When cooling, dew drops in the non-operating indoor unit. Check of mispiping When heating, room does not get warm. Refer to -6.E "How to check of inverter/ compressor". Check mis-piping, shortage of capacity When cooling, room does not cool. Refer to -6.E "How to check of inverter/ compressor". 57

58 -. Troubleshooting check table MXZ-A No. Symptom Outdoor unit does not operate. 5 Indication LED(Red) LED(Yellow) Lightning Once LEV for drain Lightning Twice Outdoor power system Lightning Lightning Lightning times times 5 times Abnormal point / Condition Discharge temperature thermistor Fin temperature thermistor P.C board temperature thermistor Ambient temperature thermistor Outdoor heat exchanger temperature thermistor Defrost thermistor Condition When the indoor unit detects any abnormality in the LEV for drain. When over current protection stop is continuously performed three times within minute after the compressor gets started, or when converter protection stop or bus-bar voltage protection stop is continuously performed three times within minutes after start-up. When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 0 minutes of compressor start-up. When a short or open circuit is detected in the thermistor during operation. When a short or open circuit is detected in the thermistor during operation. When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes (in cooling) and 0 minutes (in heating) of compressor start-up. When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes of compressor start-up. Correspondence Refer to -6.D "Check of LEV". Check the drain pump of the indoor unit. Check the connection of the compressor connecting wire. Refer to -6.E "How to check inverter/compressor". Check the stop valve. Refer to -6.F "Check of outdoor thirmistors". Refer to -6.F "Check of outdoor thirmistors". Replace the outdoor electronic control P.C. board. Refer to -6.F "Check of outdoor thirmistors" 'Outdoor unit stops and restarts minutes later' is repeated. Outdoor unit operates. Lightning 7 times Nonvolatile memory data When the nonvolatile memory data cannot be read properly. Replace the outdoor electronic control P.C. board. Twice Goes out times Goes out times Goes out 5 times Goes out Over current Discharge temperature protection Fin temperature protection P.C. board temperature protection High-pressure protection 0 times Goes out Compreesor When 8A current flow into intelligent power module. When discharge temperature exceeds 6: during operation. Compressor can restart if discharge temperature thermistor reads 00: or less minutes later. When the fin temperature exceeds 87: during operation. When the P.C. board temperature exceeds 70: during operation. When the outdoor heat exchanger temperature exceeds 70: during cooling or when indoor gas pipe temperature exceeds 70: during heating. Reconnect compressor connector. Refer to -6.E "How to check inverter/compressor". Check the stop valve. Check the amount of gas and refrigerant circuit. Refer to -6.D "Check of LEV". Check refrigerant circuit and refrigerant amount. Refer to -6.G "Check of outdoor fan motor". Check around of gas and the refrigerant circuit. Check of stop valve. Bus-bar voltage When the bus-bar voltage exceeds 0V or falls to 50V or below 9 times Goes out Replace the power board. protection during compressor operating. When failure occurs continuously three times within 0 seconds after times Goes out Outdoor fan motor Refer to -6.G "Check of outdoor fan motor". the fan gets started. Current sensor When a short or open circuit is detected in the current sensor during 8 times Goes out protection Replace the power board. compressor operating. Once Twice Lighting Lighting Primary current protection Secondary current protection High-pressure protection Defrosting in cooling The compressor doesn't synchronize with the operating power. When the input current exceeds 5A. When the current of the compressor exceeds 5A. When the indoor gas pipe temperature exceeds 5: during heating. When the indoor gas pipe temperature falls : or below during cooling. Reconnect compressor connector. Refer to -6.E "How to check inverter/compressor". Check the stop valve. These symptoms do not mean any abnormality of the product, but check the following points. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. 7 times Lighting Discharge temperature protection When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 50:(COOL mode) /0:(HEAT mode) for more than 0 minutes. Check refrigerant circuit and refrigerant amount. Refer to -6.D "Check of LEV". Refer to -6.F "Check of outdoor thermistors". 8 times Lighting Low discharge temperature protection When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 9: for more than 0 minutes. Refer to -6.D "Check of LEV". Check refrigerant circuit and refrigerant amount. NOTE. The location of LED is illustrated at the right figure. Refer to LED is lighted during normal operation. The flashing frequency shows the number of times the LED blinks after every.5-second OFF. (Example) When the flashing frequency is. -second ON Outdoor electronic control P.C. board(parts side) LED LED Lighting -second ON ON OFF.5-second OFF.5-second OFF 58

59 No. 9 Symptom Outdoor unit operates. Indication LED(Red) LED(Yellow) 5 times Lighting Abnormal point / Condition Cooling high-pressure protection Condition When the outdoor heat exchanger temperature exceeds 58: during operation. Correspondence This symptom does not mean any abnormality of the product, but check the following points. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. 0 Outdoor unit operates normally. 9 times Lighting Inverter check mode When the unit is operated with emergency operation switch. - Lighting Lighting Normal

60 MXZ-A/A No. Symptom Outdoor unit does not operate. 5 6 Indication LED(Red) LED(Yellow) Lightning Once LEV for drain Lightning Twice Outdoor power system Lightning Lightning Lightning times times 5 times Abnormal point / Condition Discharge temperature thermistor Fin temperature thermistor P.C board temperature thermistor Ambient temperature thermistor Outdoor heat exchanger temperature thermistor Defrost thermistor Condition When the indoor unit detects any abnormality in the LEV for drain. When over current protection stop is continuously performed three times within minute after the compressor gets started, or when converter protection stop or bus-bar voltage protection stop is continuously performed three times within minutes after start-up. When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 0 minutes of compressor start-up. When a short or open circuit is detected in the thermistor during operation. When a short or open circuit is detected in the thermistor during operation. When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes (in cooling) and 0 minutes (in heating) of compressor start-up. When a short circuit is detected in the thermistor during operation, or when an open circuit is detected in the thermistor after 5 minutes of compressor start-up. Correspondence Refer to -6.D "Check of LEV". Check the drain pump of the indoor unit. Check the connection of the compressor connecting wire. Refer to -6.E "How to check inverter/compressor". Check the stop valve. Refer to -6.F "Check of outdoor thirmistors". Refer to -6.F "Check of outdoor thirmistors". Replace the outdoor electronic control P.C. board. Refer to -6.F "Check of outdoor thirmistors". Lightning 7 times Nonvolatile memory data When the nonvolatile memory data cannot be read properly. Replace the outdoor electronic control P.C. board Lightning 8 times Current sensor Current sensor protection stop is continuously performed twice. Replace the power board. Lightning Lightning 0 times times Lightning times 'Outdoor unit stops and restarts Twice Goes out minutes later' is repeated. times Goes out times Goes out 5 times Goes out 8 times Goes out 9 times Goes out Gas pipe temperature thermistor A Gas pipe temperature thermistor B Gas pipe temperature thermistor C Gas pipe temperature thermistor D Communication error between P.C. boards Zero cross detecting circuit IPM protection Lock protection Discharge temperature protection Fin temperature protection P.C. board temperature protection High-pressure protection Converter protection Bus-bar voltage protection () Bus-bar voltage protection () When a short or open circuit is detected in the thermistor during cooling. (A,B,C : MXZ-A5/A7/A80) (D : MXZ-A7/A80) When the communication protection stop between boards is continuously performed twice. The protection stop of the zero cross detecting circuit is continuously performed 0 times. When over-current is detected after 0 minutes of compressor start-up. When over-current is detected within 0 minutes of compressor start-up When discharge temperature exceeds 6: during operation. Compressor can restart if discharge temperature thermistor reads 00: or less minutes later. When the fin temperature exceeds 87: during operation. When the P.C. board temperature exceeds 70: during operation. When high-pressure is detected with the high-pressure switch (HPS) during operation.(mxz-a80) When the outdoor heat exchanger temperature exceeds 70: during cooling or when indoor gas pipe temperature exceeds 70: during heating. When a failure is detected in the operation of the converter during operation. When the bus-bar voltage exceeds 00V or falls to 00V or below during compressor operating. When the bus-bar voltage exceeds 00V or falls to 50V or below during compressor operating. Refer to -6.F "Check of outdoor thirmistors". Check the connecting wire between outdoor electronic control P.C. board and power board. Check the connecting wire among outdoor electronic control P.C. board, noise filter P.C. board and power board. Reconnect compressor connector. Refer to -6.E "How to check inverter/compressor". Check the stop valve. Check the power module (PAM module). Check the amount of gas and refrigerant circuit. Refer to -6.D "Check of LEV". Check refrigerant circuit and refrigerant amount. Refer to -6.G "Check of outdoor fan motor". Check around of gas and the refrigerant circuit. Check of stop valve. Replace the power board. Replace the power board. times Goes out Outdoor fan motor When failure occurs continuously three times within 0 seconds after the fan gets started. Refer to -6.G "Check of outdoor fan motor". Lighting 8 times Current sensor When a short or open circuit is detected in the current sensor during protection compressor operating. Replace the power board. Lighting times Communication between P.C. Communication error occurs between the outdoor electronic control P.C. Check the connecting wire between outdoor electronic control boards protection board and power board for more than 0 seconds.(mxz-a5/a7/a80) P.C. board and power board. Lighting times Zero cross detecting circuit When zero cross signal cannot be detected while the compressor is Check the connecting wire among outdoor electronic control protection operating. P.C. board, noise filter P.C. board and power board. NOTE. The location of LED is illustrated at the right figure. Refer to LED is lighted during normal operation. The flashing frequency shows the number of times the LED blinks after every.5-second OFF. (Example) When the flashing frequency is. -second ON Outdoor electronic control P.C. board(parts side) LED LED Lighting -second ON ON OFF.5-second OFF.5-second OFF 60

61 No. Symptom Outdoor unit operates. Indication LED(Red) LED(Yellow) Once Lighting Twice Lighting Abnormal point / Condition Primary current protection Secondary current protection High-pressure protection Defrosting in cooling Condition When the input current exceeds 5A. When the current of the compressor exceeds 5A. When the indoor gas pipe temperature exceeds 5: during heating. When the indoor gas pipe temperature falls : or below during cooling. Correspondence These symptoms do not mean any abnormality of the product, but check the following points. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. times Lighting Discharge temperature protection When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 50:(COOL mode) /0:(HEAT mode) for more than 0 minutes. Check refrigerant circuit and refrigerant amount. Refer to -6.D "Check of LEV". Refer to -6.F "Check of outdoor thermistors". times Lighting Low discharge temperature protection When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 9: for more than 0 minutes. Refer to -6.D "Check of LEV". Check refrigerant circuit and refrigerant amount. 5 5 times Lighting Cooling high-pressure protection When the outdoor heat exchanger temperature exceeds 58: during operation. This symptom does not mean any abnormality of the product, but check the following points. Check if indoor filters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled. 6 Outdoor unit operates normally. 9 times Lighting Inverter check mode When the unit is operated with emergency operation switch. - 7 Lighting Lighting Normal - - 6

62 -5. Trouble criterion of main parts MXZ-A0VA MXZ-A5VA MXZ-A5VA MXZ-A7VA MXZ-A80VA Discharge temperature thermistor (RT6) Fin temperature thermistor (RT6) Part name Defrost thermistor (RT6) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Gas pipe temperature thermistor (RT6A~D) Measure the resistance with a tester. Check method and criterion Refer to -7. Test point diagram and voltage,. Inverter P.C. board or. Outdoor electronic control P.C. board, the chart of thermistor. Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. Refer to -7. Test point diagram and voltage,. Inverter P.C.board or. Outdoor electronic control P.C. board, the chart of thermistor. Compressor W RED Measure the resistance between terminals using a tester. (Winding temperature : -0 C ~ 0 C) V WHT U MXZ-A0/5 6Ω ~ 0.69Ω Normal (Each phase) MXZ-A5/A7 0.9Ω ~ 0.9Ω MXZ-A80.9Ω ~.9Ω Outdoor fan motor WHT RED W V U MXZ-A MXZ-A/A RED U (W) WHT V (V) W (U) Measure the resistance between lead wires using a tester. (Part temperature : -0 C ~ 0 C) MXZ-A Ω ~ 6Ω Normal ( Each phase) MXZ-A/A.Ω ~ 6.Ω R.V. coil Measure the resistance using a tester. (Part temperature : -0 C ~ 0 C) Normal.kΩ ~.56kΩ Linear expansion valve WHT RED LEV ORN YLW BRN BLU Measure the resistance using a tester.(part temperature : -0 C ~ 0 C) Color of lead wire WHT - RED RED - ORN YLW - BRN BRN - BLU Normal 7.Ω ~ 5.9Ω High pressure switch (HPS) MXZ-A80 HPS Pressure Normal.7 ± MPa Close MPa Open 6

63 -6. Troubleshooting flow Outdoor unit does not operate. (LED display: display OFF) A Check of power supply MXZ-A0/A5 Check the connecting of parts of main power supply circuit. Turn on power supply. Is there voltage of 0V AC in the power supply terminal block? No Check the power supply cable. Yes Is the output voltage from the power P.C. board 0V AC? No Is fuse (F6 or F6) blown? No Replace the power P.C. board. Yes Yes Replace the fuse. Is the input voltage to the inverter P.C. board 0V AC? No Replace the reactor. Yes Replace the inverter P.C. board. MXZ-A5/A7/A80 Check the connecting of parts of main power supply circuit. Turn on power supply. Is there voltage of 0V AC in the power supply terminal block? No Check the power supply cable. Yes Is the output voltage from the noise filter P.C. board 0V AC? No Is fuse (F6) blown? No Replace the noise filter P.C. board. Yes Yes Replace the fuse. Is the input voltage to the power board 0V AC? No Replace the reactor. Yes Is the input voltage to the outdoor electronic control P.C. board 5V DC? No Replace the power board. Yes Replace the outdoor electronic control P.C. board. 6

64 When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. When OPERATION INDICATOR lamp flashes ON and OFF in every -second. Outdoor unit does not operate. (LED display : Both LED and LED lighting) B How to check mis-wiring and serial signal error (when outdoor unit does not work) Turn OFF the power supply. Is there rated voltage in the power supply? Yes Turn ON the power supply. No Check the power supply. Is there rated voltage between outdoor terminal block S and S? No Check the wiring. Yes Press EMERGENCY OPERATION switch once. Outdoor display P.C. board LED LED Does the left lamp of OPERATION INDICATOR lamp light up? <Confirmation of the power to the indoor unit> Yes Is serial signal error indicated 6 minutes later? Yes No No Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? No Yes Make them correct. A LED Unit A Blinking LED Unit B Outdoor electronic control P.C. board (Parts side) LED LED LED B Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring. Short-circuit outdoor terminal block S and S. W W. Mis-wiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. Turn ON the power supply. Blinking A Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON again. Press EMERGENCY OPERATION switch. Is serial signal error indicated 6 minutes later? B LED indication LED Unit B Unit D LED Lit Not Lit Yes No LED Unit A Unit C The LED indication for unit A and unit B, and unit C and unit D interchanges at a interval of 5 seconds. Reinstall either the unit or the light each other away. Attach a filter on remote control receiving section of the indoor unit. Does the LED on the outdoor display P.C. board or the outdoor electronic control P.C. board repeat ".6-second-OFF and 0.8-second-ON quick blinking"? Yes Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S and S. Turn ON the power supply. Is there amplitude of 0 to 0V DC between outdoor terminal block S and S? <Confirmation of serial signal> Yes Is there rated voltage between indoor terminal block S and S? <Confirmation of power voltage> Yes Be sure to release the failure-mode recall function after checking. Refer to indoor unit service manual. 6 No No Replace the indoor electronic control P.C. board. No (Lighted or not lighted) Replace the inverter P.C. board or the outdoor electronic control P.C. board. W W Be careful to the residual voltage of smoothing capacitor. Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? No Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block? No Yes Yes Replace the indoor/outdoor connecting wire. Replace the indoor/outdoor connecting wire.

65 The cooling operation or heating operation does not operate. (LED display: Both LED and LED lighting) C Check of R.V. coil When heating operation does not work.. Disconnect the lead wire leading to the compressor.. minutes after turning on the power supply, start EMERGENCY OPERATION in HEAT mode. CN9 CN78 CN9 MXZ-A Power P.C. board Inverter P.C. board MXZ-A/A Noise filter P.C. board Outdoor electronic control P.C. board Is there voltage of 0V AC between pin and pin at connector CN9? Yes Turn off power supply of indoor and outdoor unit. No. Turn off power supply of indoor and outdoor unit, and disconnect the connector CN9 or CN78.. minutes after turning on the power supply, start EMERGENCY OPERATION in HEAT mode. Disconnect the connector CN9. Is there normal resistance to R.V. coil? No Replace the R.V. coil. Is there voltage V DC between the connector CN9 pin (+) and pin (-) or the connector CN78 pin 5 (+) and pin (-)? No Replace the inverter P.C. board or the electronic control P.C. board. Yes Yes Replace the -way valve. Replace the power P.C. board or the noise filter P.C. board. When cooling operation does not work.. Disconnect the lead wire leading to the compressor.. minutes after turning on the power supply, start EMERGENCY OPERATION in COOL mode. Is there voltage of 0V AC between pin and pin at connector CN9? W Yes. Turn off power supply of the indoor and the outdoor unit, and disconnect the connector CN9 or CN78.. minutes after turning on the power supply, start EMERGENCY OPERATION in COOL mode. No Replace the -way valve. W If the connector CN9 is not connected or R.V. coil is open, voltage occurs between terminals even when the control is OFF. Is there voltage V DC between the connector CN9 pin (+) and pin (-) or the connector CN78 pin 5 (+) and pin (-)? Yes No Replace the power P.C.board or the noise filter P.C. board. Replace the inverter P.C. board or the outdoor electronic control P.C. board. 65

66 When cooling, heat exchanger of non-operating indoor unit frosts. When heating, non-operating indoor unit get warm. D Check of LEV LED display: LED LED Lighting Lighting Lighting Once Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click" sound heard? Or, do you feel vibration of LEV coil with a hand? No Yes Normal Disconnect the connector CN79: LEV A, CN79: LEV B, CN79: LEV C, CN79: LEV D, CN795: LEV E. Is there normal resistance to LEV coil? No Replace LEV coil. Yes Replace the inverter P.C. board or the outdoor electronic control P.C. board. 66

67 When heating, room does not get warm. When cooling, room does not get cool. E How to check inverter/ compressor LED display: LED LED Lighting Lighting Lighting Twice Twice Goes out Disconnect the terminal of the compressor. minutes after turning on the power supply, start EMERGENCY OPERATION. Measure the voltage between each lead wire leading to the compressor. U () - V (WHT) V (WHT) - W (RED) W (RED) - U () Output voltage COOL: 50V(8Hz) HEAT: 70V(6Hz) Is voltage output? W, W Yes (MXZ-A) Yes No Is output balanced? Yes (MXZ-A/A) W After the outdoor fan starts running, wait for minutes or more before measuring the voltage. The output voltage values have the tolerance of i0%. W The output differs depending on the capacity or the No number of indoor units to be operated. Is the input voltage to the outdoor electronic control P.C. board 70V or more? Yes No Replace the inverter P.C. board or the power board. Turn off power supply of indoor and outdoor unit, and measure the compressor winding resistance between the compressor terminals. Is the resistance between each terminal normal? Yes Reconnect the lead wire of compressor, and turn on power supply to indoor and outdoor unit. minutes later, starts EMERGENCY OPERATION. No Replace the compressor. Clarify the causes by counting time until the inverter stops. 0 to 0 seconds: compressor rare short 0 to 60 seconds: compressor lock 60 seconds to 5minutes: refrigerant circuit defective 5 minutes or more: normal 67

68 When thermistor is abnormal. (When the LED display is a table below.) F Check of outdoor thermistors Disconnect the connector in the following table and measure the resistance of the thermistor to check whether the thermistor is normal or not. Normal Abnormal Replace the thermistor. Reconnect the connector in the following table and disconnect the lead wire leading to the compressor. minutes after turning on the power supply, start EMERGENCY OPERATION. Does thermistor operate 0 minutes or more though the thermistor abnormality is not displayed? Yes Normal No Replace the outdoor electronic control P.C. board. MXZ-A0/A5 Thermistor Defrost Discharge temperature Outdoor heat exchanger temperature Fin temperature Ambient temperature Symbol RT6 RT6 RT68 RT6 RT65 Connector, Pin No. Between CN66 pin and pin Between CN66 pin and pin Between CN66 pin5 and pin6 Between CN66 pin and pin Between CN66 pin and pin Board Inverter P.C. board MXZ-A5/A7/A80 Thermistor Defrost Discharge temperature Outdoor heat exchanger temperature Gas pipe temperature (Unit A) Gas pipe temperature (Unit B) Gas pipe temperature (Unit C) Gas pipe temperature (Unit D) Ambient temperature Fin temperature Symbol RT6 RT6 RT68 RT6A RT6B RT6C RT6D RT65 RT6 Connector, Pin No. Between CN66 pin and pin Between CN66 pin and pin Between CN66 pin7 and pin8 Between CN66 pin and pin Between CN66 pin and pin Between CN66 pin5 and pin6 Between CN66 pin7 and pin8 Between CN66 pin and pin Between CN pin and pin Board Outdoor electronic control P.C. board Outdoor power board 68

69 Fan motor does not operate or stops operating shortly after starting the operation. G Check of outdoor fan motor Check the connection between the connector CN9 and CN9. Is the resistance between each terminal of outdoor fan motor normal? No Yes Disconnect CN9 from outdoor electronic control P.C. board, and turn on the power supply. Rotate the outdoor fan motor manually and measure the voltage of CN9. Between (+) and 5(-) Between (+) and 5(-) Between (+) and 5(-) (Fixed to either 5V or 0V DC) No No Replace the outdoor DC fan motor. Does the voltage between each terminal become 5V DC and 0V DC repeatedly? Yes Does the outdoor fan motor rotates smoothly? Yes Replace the outdoor electronic control P.C. board. 69

70 When the operation frequency does not go up from lowest frequency. H Check of HPS MXZ-A80VA. Disconnect the connector CN68 in the electronic control P.C. board.. Check the resistance of HPS after minutes have passed since the outdoor unit power supply was turned off. Check the resistance between each terminal. 0" Infinity Replace HPS. Reconnect CN68. Turn on power supply to the indoor and outdoor unit. minutes later, starts EMERGENCY OPERATION. Yes Is HPS protection displayed immediately after compressor starts? Yes Normal No Replace the electronic control P.C. board. I The other cases Indoor unit dose not operate. (different operating models in multisystem) When you try to run two indoor unit simultaneously, one for cooling and the other for heating, the unit which transmits signal to the outdoor units earlier decides the operation mode. The other unit indicates as shown in the figure below. When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and then turn them back ON. Though the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that the refrigerant gas continuously flows into the indoor unit even while it is not operating. OPERATION INDICATOR Lighting Blinking 70

71 -7. Test point diagram and voltage. Inverter P.C. board MXZ-A0VA MXZ-A5VA Back side of unit 0V AC Input 5V DC 8V DC 5V DC V DC FUSE(F80).5V/50V FUSE(F90).5V/50V JK,JGO To interface P.C.board Output to drive compressor (LDW, LDV, LDU) LEV A (CN79) LEV B (CN79) Front side of unit To display P.C.board Primary current R.V.coil X6 Zero cross GND V Defrost thermistor/rt6 (CN66) Discharge temperature thermistor/rt6 (CN66) Outdoor heat exchanger temperature thermistor /RT68 (CN66) Fin temperature thermistor/rt6 (CN66) Ambient temperature thermistor /RT65 (CN66) ( GND 5V DC pulse wave 5V To fan motor( Output to drive outdoor fan motor (CN9) Resistance(k") Fin temperature thermistor(rt6) Temperature(:) Resistance(k") Defrost thermistor(rt6) Ambient temperature thermistor(rt65) Outdoor heat exchanger temperature thermistor(rt68) Temperature(:) 7 Resistance(k") Discharge temperature thermistor(rt6) Temperature(:)

72 OB77--.qxp 05.. : PM Page 7. Outdoor electronic control P.C. board Defrost thermistor (RT6) Ambient temperature thermistor (RT65) Gas pipe temperature thermistor (RT6A,6B,6C,6D) Fin temperature thermistor (RT6) Outdoor heat exchanger temperature thermistor (RT68) MXZ-A5VA MXZ-A7VA MXZ-A80VA Discharge temperature thermistor (RT6) Temperature (;) Temperature (;) Temperature (;) LEV E CN795 V DC pulse wave ( ( ( (+) ( LED () CN78 (+) V R.V. coil () DC Rush current relay () GND (power board) ( ( ( ( ( CN9 GND 5V 5V DC pulse wave CN9 0-90V AC 5V 5V CN70 () Signal reception (From power board) GND To fan motor ( 5V DC pulse wave (+) CN70 Signal transmission (+) (To power board) () 5V DC pulse wave CN66 Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) ( 0 CN Resistance (k') Resistance (k') 00 Discharge temperature thermistor (RT6) ( Defrost thermistor (RT6) ( Resistance (k') CN60 Serial signal Room D ~V DC LED LED SW CN60 Serial signal Room C ~V DC CN80 5V DC ~ 70V DC Input CN60 Serial signal Room B ~V DC F80 FUSE.5A/50V CN60 0V AC 50 Hz Input Serial signal Room A ~V DC ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( CN79 V DC () pulse wave LEV Room (+) A CN79 V DC () pulse wave LEV Room (+) B CN79 V DC () pulse wave LEV Room (+) C CN79 V DC () pulse wave (+) LEV Room D CN68 MXZ-A80VA High pressure switch CN66 Gas pipe D thermistor Gas pipe C thermistor Gas pipe B thermistor Gas pipe A thermistor 7

73 . Noise filter P.C. board MXZ-A5VA MXZ-A7VA MXZ-A80VA CN90 To electronic control P.C. board CN90 To power board CN90 To power board { { 0V AC 50Hz Input CN9 R.V. coil 0V AC { 0V AC 50Hz Output { 0V AC 50Hz Output NR6 VARISTOR F6 FUSE A/50V F9 FUSE A/50V 7

74 . Power P.C. board MXZ-A0VA MXZ-A5VA F6(FUSE) 0A/50V Back side of unit Front side of unit 0V AC Input 0V AC Output R.V.coil (CN9) 0V AC FUSE(F6).5A/50V V R.V.coil Zero cross GND Primary current ( X6 To inverter P.C.board(CN9) 7

75 5. Outdoor Power board MXZ-A5VA MXZ-A7VA MXZ-A80VA Connect to the compressor Voltage among phases: 5V to 80V 5-70V DC Output (Red) (+) () (White) Connect to the earth CN Fin temperature thermistor CN Connect to the controller board (+)-5(): Signal transmission (To electronic control P.C. board) 5V DC pulse wave (+)-5(): Zero cross signal - : Not used (+)6-5(): 5V (+)7-5(): 5V Signal reception (From electronic control P.C. board) 5V DC pulse wave CN5 Primary current detection (Connect to the noise filter) ) 75

76 6. Display P.C. board MXZ-A0VA MXZ-A5VA 5V GND SW LED LED 7. Interface P.C. board MXZ-A0VA MXZ-A5VA 5V GND Serial signal room A Serial signal room B 0V AC 76

77 DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to () and ()) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. () Slide the sleeve and check if there is a locking lever or not. () The terminal with this connector has the locking mechanism. Sleeve Locking lever Slide the sleeve. Pull the terminal while pushing the locking lever. Connector Hold the sleeve, and pull out the terminal slowly. -. MXZ-A0VA MXZ-A5VA OUTDOOR UNIT OPERATING PROCEDURE. Removing the cabinet. () Remove the screw fixing the service panel. (See Photo.) () Pull down the service panel and remove it. (See Photo.) () Disconnect the power supply and indoor/outdoor connecting wire. () Remove the screws fixing the top panel. (See Photo.) (5) Remove the top panel. (See Photo.) (6) Remove the screws fixing the cabinet. (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel. Photo Screws of the top panel Screw of the cabinet PHOTOS Screws of the top panel Back panel Screw of the service panel Direction to remove Hooks Screws of the cabinet Service panel 77

78 OPERATING PROCEDURE. Removing the inverter assembly, inverter P.C. board and power P.C. board () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) () Disconnect the ground wires(see Photo.), the lead wire to the reactor and the following connectors; <Power P.C. board> CN9 (-way valve) <Inverter P.C. board> CN9,CN9 (Fan motor) CN66 (Defrost thermistor, discharge temperature thermistor and outdoor heat exchanger temperature thermistor) CN66 (Ambient temperature thermistor) CN79,CN79 (LEV A,LEV B) () Remove the compressor connector (CN6). (5) Remove the screws fixing the relay panel. (See Photo.) (6) Remove the inverter assembly. (See Photo.) (7) Disconnect all connectors and lead wires on the inverter P.C. board. (See Photo.) (8) Remove the inverter P.C. board from the inverter assembly. (9) Remove the screw fixing the power P.C. board. (See Photo.) (0) Disconnect all connectors and lead wires on the power P.C. board. () Remove the power P.C. board from the inverter assembly. Photo Photo Heat sink Screws of the relay panel PHOTOS Inverter P.C. board Screws of the ground wires Power P.C. board. Removing R.V. coil () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) () Remove the inverter assembly. (Refer to.) () Remove the R.V. coil. (See Photo.). Removing the discharge temperature thermistor, defrost thermistor and outdoor heat exchanger temperature thermistor () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) () Remove the inverter assembly. (Refer to.) () Pull out the discharge temperature thermistor from its holder. (See Photo.) (5) Pull out the defrost thermistor from its holder. (See Photo 5.) (6) Pull out the outdoor heat exchanger temperature thermistor from its holder. (See Photo 5.) Photo Screw of the power P.C. board R.V. coil Discharge temperature thermistor 78

79 OPERATING PROCEDURE 5. Removing outdoor fan motor () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire. () Disconnect the connectors for outdoor fan motor. () Remove the propeller nut. (5) Remove the propeller. (6) Remove the screws fixing the fan motor. (See Photo 6.) (7) Remove the fan motor. Photo 5 PHOTOS Outdoor heat exchanger temperature thermistor 6. Removing the compressor and -way valve () Remove the top panel, cabinet and service panel. (Refer to.) () Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to.) () Remove the inverter assembly. (Refer to.) () Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm (0 MPa). Defrost thermistor (5) Detach the welded part of the suction and the discharge pipe connected with compressor. (6) Remove the nuts of compressor legs. (7) Remove the compressor. (8) Detach the welded part of pipes connected with -way valve. (See Photo 7.) Photo 6 Screws of the outdoor fan motor Propeller Photo 7 79 Welded parts of -way valve

80 -. MXZ-A5VA MXZ-A7VA OUTDOOR UNIT OPERATING PROCEDURE. Removing the compressor ()Remove the screws of the top panel, and remove the top panel. ()Remove the screws of the service panel, and remove the service panel. Recover refrigerant gas. ()Remove the screws of the cabinet, and remove the cabinet. ()Remove the screws of the back panel, and remove the back panel. (Photo ) (5)Disconnect the compressor lead wire from terminal of the compressor. (U, V, W) (6)Disconnect the outdoor electronic control P.C. board connectors. CN66, CN66, CN79, CN79, CN79, CN66, CN79 (MXZ-A7VA), CN795, CN9, CN9 Disconnect the noise filter P.C. board connector. CN9 (7)Remove the screws of the electrical parts, and remove the electrical parts. (Photo ) (8)Remove the propeller. (9)Remove the screws of the separator, and remove the separator. (Photo 6) (0)Remove the sound proof felt. (Photo 6) ()Detach the welded parts of the compressor suction and discharge pipes. (Photo 5) ()Remove the compressor nuts and remove the compressor. Photo Screws of the cabinet Photo Screws of the top panel PHOTOS Screws of the cabinet Screws of the top panel Screws of the cabinet Screws of service panel Screw of the cabinet Screws of the cabinet 80

81 OPERATING PROCEDURE PHOTOS Photo Screw of the rear guard Screw of the back panel Photo 5 R.V. coil way valve LEV coil Expansion valve Screws of the back panel Suction pipe welded part Discharge pipe welded part Screws of the back panel Screw of the back panel Photo Compressor nuts Screws of the electrical parts. Removing the fan motor ()Remove the top panel, the service panel, and the cabinet. (Photo ) ()Disconnect the connector CN9 and CN9 on the outdoor electronic control P.C. board. ()Remove the propeller. ()Remove the fan motor. Photo 6 Screws of the outdoor fan motor Propeller Propeller nut Separator Sound proof felt 8

82 OPERATING PROCEDURE. Removing the -way valve ()Remove the top panel. (Photo ) ()Remove the service panel the cabinet and the back panel. Recover refrigerant gas. ()Remove the electrical parts. (Photo ) ()Detach the welded parts of -way valve and pipe. (Photo 7) Photo 7 PHOTOS way valve R.V. coil Welded parts. Removing the expansion valve ()Remove the top panel. (Photo ) ()Remove the service panel, the cabinet and the back panel. (Photo, ) (Gas recovery is not required if the unit is pumped down.) ()Remove the LEV coils. ()Detach the welded parts of expansion valves and pipes. Photo 8 LEV coils Expansion valves 5. Removing the reactor ()Remove the top panel. (Photo ) ()Remove the service panel, cabinet, back panel and the relay panel. ()Disconnect the reactor lead wire from the terminal of the reactor. ()Remove the screws of the reactor, and remove the reactor. (Photo 9) Photo 9 Screws of the reactor 8

83 -. MXZ-A80VA OUTDOOR UNIT OPERATING PROCEDURE. Removing the compressor ()Remove the screws of the top panel, and remove the top panel. ()Remove the screws of the service panel, and remove the service panel. Recover refrigerant gas. ()Remove the screws of the front panel, and remove the front panel. ()Disconnect the compressor lead wire from terminal of compressor. (U, V, W) (5)Disconnect the outdoor electronic control P.C. board connectors. CN66, CN66, CN66, CN68, CN79, CN79, CN79, CN79, CN795, CN9, CN9 Disconnect the noise filter P.C. board connector. CN9 (6)Remove the screws of the electrical parts, and remove the electrical parts. (7)Remove the propeller. (8)Remove the screws of the separator, and remove the separator. (9)Remove the sound proof felt. (0)Detach the welded parts of the compressor suction and discharge pipes. (Photo ) ()Remove the compressor nuts and remove the compressor. Photo Photo Screws of the electrical parts PHOTOS Screws of the top panel Screws of the front panel Screws of service panel Electronic control P.C. board Photo LEV coil Expansion valve Suction pipe welded part Discharge pipe welded part Terminal 8

84 OPERATING PROCEDURE. Removing the fan motor ()Remove the top panel, the service panel, and the front panel. (Photo ) ()Disconnect the connector CN9 and CN9 on the outdoor electronic control P.C. board. ()Remove the propeller. ()Remove the fan motor. Photo PHOTOS Screws of the outdoor fan motor Propeller Propeller nut Separator Sound proof felt Compressor nuts. Removing the -way valve ()Remove the top panel. (Photo ) ()Remove the service panel, rear panel, and pipe cover. Recover refrigerant gas. ()Remove the electrical parts. (Photo ) ()Detach the welded parts of -way valve and pipe. (Photo 5) Photo 5 way valve R.V. coil Welded parts. Removing the expansion valve ()Remove the top panel. (Photo ) ()Remove the service panel. (Photo ) (Gas recovery is not required if the unit is pumped down.) ()Remove the LEV coils. ()Detach the welded parts of expansion valves and pipes. Photo 6 LEV coils Expansion valves 8

85 OPERATING PROCEDURE PHOTOS 5. Removing the reactor ()Remove the top panel. (Photo ) ()Disconnect the reactor lead wire. ()Remove the screws of the reactor, and remove the reactor. (Photo 7) Photo 7 Screws of the reactor 85

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