SERVICE MANUAL. Wireless type Models MSZ-A09RV - (WH) MUZ-A09RV - MSZ-A12RV - (WH) MUZ-A12RV - E1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

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1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SERVICE MANUAL. OB0 REVISED EDITION-A Wireless type Models E E MSZ-A09RV - (WH) MUZ-A09RV - MSZ-ARV - (WH) MUZ-ARV - E E CONTENTS. TECHNICAL CHANGES. PART NAMES AND FUNCTIONS 4. SPECIFICATION 6 4. NOISE CRITERIA CURVES 8 5. OUTLINES AND DIMENSIONS 9 6. WIRING DIAGRAM 0 7. REFRIGERANT SYSTEM DIAGRAM 8. PERFORMANCE CURVES 9. MICROPROCESSOR CONTROL 0. SERVICE FUNCTIONS 8. TROUBLESHOOTING 40. DISASSEMBLY INSTRUCTIONS 57. PARTS LIST 6 Revision: A number of drainage holes of MUZ-A09RV- E and MUZ-ARV- E has been increased. Compressors of MUZ-A09RV- E and MUZ-ARV- E has been changed.(snb09fba SNB09FJAH) SPECIFICATION, OUTLINES AND DIMENSIONS and PARTS LIST have been partially modified. Please void OB0.

2 TECHNICAL CHANGES INFORMATION FOR THE AIR CONDITIONER WITH R40A REFRIGERANT This room air conditioner adopts R40A of HFC refrigerant which never destroys the ozone layer. Pay attention following points. As R40A working pressure is.6 times higher than that of R of previous refrigerant, dedicated tools and piping are required. R40A is more affected by water and contaminations than R. Keep R40A away from water and contaminations during storage and while installing. Use clean dedicated piping materials for R40A only which are strong enough against R40A pressure. Never use any current pipes designed for R. 4 Composition change may occur in R40A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change. Lubricant Refrigerant New refrigerant Refrigerant R40A Composition (Ratio) HFC-: HFC-5 (50%:50%) Refrigerant handling Pseudo-azeotropic refrigerant Chlorine t included Safety group (ASHRAE) A/A Molecular weight 7.6 Boiling point (:) -5.4 Steam pressure [5:](Mpa).557 Saturated steam density [5:](Kg/K) 64 Combustibility n combustible ODP w 0 GWP w 70 Refrigerant charge method From liquid phase in cylinder Additional charge on leakage Possible Kind Incompatible oil Color n Smell n w :Ozone Destruction Parameter : based on CFC- w :Global Warmth Parameter : based on CO Previous refrigerant R R (00%) Single refrigerant Included A n combustible Gas phase Possible Compatible oil Light yellow n Compressor New Specification The incompatible lubricant 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 lubricant of the upper layer to the compressor. Compressor Suction muffler Oil back hole Lubricant Current Specification Since refrigerant and lubricant are compatible each, lubricant backs to the compressor through the lower position oil back hole. Compressor Suction muffler Oil back hole Refrigerant Lubricant /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])

3 Conversion chart of refrigerant temperature and pressure (MPa [Gauge]) 4.0 Saturated liquid pressure R40A 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 R40A refrigerant The following tools are required for R40A refrigerant. Some R tools can be substituted for R40A tools. The diameter of the service port on the outdoor unit operation valve has been changed to prevent improper refrigerant charging. Cap size has also been changed from 7/6 UNF with 0 threads to / UNF with 0 threads. R40A tools Can R tools be used? Description R40A pressures beyonds the measurement range of R Gauge manifold gauges. Port diameters have been changed to prevent other kinds of refrigerant from being charged into the units. Charge hose Gas leak detector Torque wrench Flare tool Flare gauge Newly required Hose material and cap size have been changed to improve the pressure resistance. Dedicated for HFC refrigerant. /4 and /8 wrenches can be used for both R and R40A units. 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 Newly required adapter vacuum pumps. Electronic scale for It is difficult to measure R40A with a charging cylinder because the Newly required refrigerant charging refrigerant bubbles due to high pressure and high-speed vaporization : t Substitutable for R40A : Substitutable for R40A.Refrigerant piping Specifications Use the refrigerant pipes that meet the following specifications. Pipe For liquid For gas Outside diameter mm inch 6.5 /4 9.5 /8 Wall thickness 0.8 mm 0.8 mm Insulation material Heat resisting foam plastic Specific gravity Thickness 8 mm Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.7 mm or less, as the pressure resistance is in sufficient. Flaring work and flare nut Flaring work for R40A pipes differs from that for the existing refrigerant pipes. For details of flaring work, refer to Installation manual 6- FLARING WORK.

4 Optional extension pipe for R40A m ([6.5/[9.5) MAC-A00PI 5m ([6.5/[9.5) MAC-A0PI 7m ([6.5/[9.5) MAC-A0PI 0m ([6.5/[9.5) MAC-A0PI m ([6.5/[9.5) MAC-A04PI.Refrigerant oil Apply the special refrigeration oil (accessories) to the flare and the union seat surfaces. 4.Air purge 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. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly. Gas cylinder Outdoor unit Valve Refrigerant gas cylinder for R40A with siphon Electronic scale for refrigerant charging Liquid PART NAMES AND FUNCTIONS MSZ-A09RV- E MSZ-ARV- E INDOOR UNIT Air cleaning filter(white bellows type) Deodorizing filter (gray sponge type) Grille Air inlet to Breaker Air filter Front panel Vertical vanes Power supply cord Remote control receiving section Horizontal vane Remote controller Operation section (When the grille is opened) Display section Emergency operation switch Power monitor lamp Receiving section 4

5 MUZ-A09RV- E MUZ-ARV- E OUTDOOR UNIT Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MSZ-A09RV- E MSZ-ARV- E REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button OPERATION SELECT button FAN SPEED CONTROL button ECONO COOL button ON-TIMER button CLOCK SET button HR. button MIN. button (TIME SET button) AM ON/OFF CLOCK TOO WARM HR. MIN. CLOCK RESET TOO COOL MODE I FEEL COOL DRY HEAT FAN ECONO COOL START PM VANE SWING STOP TEMPERATURE buttons VANE CONTROL button SWING button OFF-TIMER button RESET button 5

6 SPECIFICATION Capacity Capacity Electrical data Fan motor Special remarks Capacity Electrical data Compressor Fan motor Special remarks Indoor model Function Power supply Air flow(high) Dehumidification Power outlet Running current Power input Auxiliary heater Power factor Starting current Fan motor current Model Winding resistance(at0:) Dimensions WOHOD Weight Air direction Sound level (High) Fan speed (High) Fan speed regulator RT(at5:) Thermistor RT(at5:) RT(at5:) Outdoor model Outdoor air flow Compressor motor current Fan motor current Model Output Winding resistance(at0:) Model Winding resistance(at0:) Dimensions WOHOD Weight Sound level Fan speed Fan speed regulator Refrigerant filling capacity(r40a) Refrigerating oil (Model) RT6(at00:) Thermistor RT6(at0:) RT64(at50:) kw K /h R/h A A W A(kW) % A A " mm kg db rpm k" k" k" K /h A A Coefficient of performance(c.o.p) W " " mm kg db rpm kg cc k" k" k" NOTE : Test conditions. Cooling : Indoor DB7: WB9: Outdoor DB5: WB4: Heating : Indoor DB 0: WB -: Outdoor DB 7: WB 6: MSZ-A09RV - E Cooling Heating.6 (0.9-.) (50-80) Single phase 0-40V,50Hz RC4V9-BA WHT-BLK 9.4 BLK-RED O78O MUZ-A09RV - E SNB09FJAH 700 U-V 0.9 U-W 0.9 V-W 0.9 RA6V8-CA WHT-BLK 97 BLK-RED 5 YLW-BLK 70(+69)o540o ( ) (50-650) (NEO) MSZ-ARV - E Cooling Heating.4 (0.9-.8) (50-580) Single phase 0-40V,50Hz RC4V9-BA WHT-BLK 9.4 BLK-RED O78O MUZ-ARV - E SNB09FJAH 900 U-V 0.9 U-W 0.9 V-W 0.9 RA6V8-CA WHT-BLK 97 BLK-RED 5 YLW-BLK 70(+69)o540o (NEO) (0.9-6.) (50-050)

7 Specifications and rating conditions of main electric parts INDOOR UNIT Model Item Indoor fan capacitor Vane motor Varistor (NR) Semiconductor relay Terminal block Relay (compressor) (5C) Terminal block thermal Fuse Indoor fan motor thermal fuse Fuse (F) MSZ-A09RV MSZ-ARV V MP4GA V 00" ERZV0D47 S0DHY 4P JMaN-ZTMP-DCV 9.5:5A 50V 6:i: A 50V.5A OUTDOOR UNIT Model Item Smoothing capacitor (C6,C6) Outdoor fan capacitor (C65) Current transformer (CT6) Fuse (F80, F90) Reactor (L64) ise filter Current detecting resistor (R6, 6, 64) Current limiting resistor (R65) Terminal block Intelligent power module Relay (X6) Relay (X6) R.V. coil Power factor controll module Rush current limiting relay MUZ-A09RV MUZ-ARV V V RR-8 50V A A.0mH EM440 50m" 5W 00" 0W 4P PS0-AL / PS04-A G4U--E G4U--E LB6 50V AC PMA000 G4A-A-P-PS 7

8 4 NOISE CRITERIA CURVES MSZ-A09RV- E NOTCH SPL(dB(A)) LINE MSZ-ARV- E NOTCH SPL(dB(A)) LINE HEATING 5 COOLING 6 HEATING COOLING 9 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE Test conditions. Cooling : DB7: WB9: Heating : DB0: WB -: BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE Test conditions. Cooling : DB7: WB9: Heating : DB0: WB -: BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 MUZ-A09RV- E NOTCH SPL(dB(A)) LINE MUZ-ARV- E NOTCH SPL(dB(A)) LINE HEATING 47 HEATING 48 COOLING 45 COOLING 46 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE Test conditions. Cooling :DB5: WB4: Heating :DB 7: WB 6: BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 OCTAVE BAND SOUND PRESSURE LEVEL, db re MICRO BAR APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE Test conditions. Cooling :DB5: WB4: Heating :DB 7: WB 6: BAND CENTER FREQUENCIES, Hz NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 8

9 5 OUTLINES AND DIMENSIONS MSZ-A09RV- E MSZ-ARV- E INDOOR UNIT 88 Installation plate Indoor unit Air in or more 89 5 Installation plate { Wall hole [65 Liquid line [ m Gas line [ m Insulation [7 O.D [ I.D Drain hose [6 (Connected part O.D) Air out 78 Insulation [8 Power supply cord Lead to right.0m Lead to left 0.m Wireless remote controller MUZ-A09RV- E MUZ-ARV- E OUTDOOR UNIT 9.4 Air in Drainage hole [8 4 holes 0o 8 Handle Drainage hole [8 Air in Drainage hole [8 Drainage hole [8 7 Air out REQUIRED SPACE 00mm or more If both sides or back side is vacant. only to be free 500mm in front of a unit Service panel 00mm or more 500mm or more Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.5 If a front side or both sides is vacant. an upper side of a unit has only to be vacant 00mm. 00mm or more 50mm or more Bolt pitch for installation Gas refrigerant pipe joint 8 Refrigerant pipe (flared) [9.5 Service port 9

10 6 WIRING DIAGRAM MSZ-A09RV- E MSZ-ARV- E MODELS WIRING DIAGRAM INDOOR UNIT TO OUTDOOR UNIT CONNECTING V PE TB L 0-40V~ N POWER SUPPLY CORD ~/N 0-40V 50Hz BLU GRN/YLW BRN WHT CIRCUIT BREAKER BRN BLU GRN/YLW RED F BLU BLU GREEN SIGN MONITOR P.C.BOARD CN J MV BLU CN 5 0 MV CN0 4 5C LD0T 5 HIC TRANS F NR C SR4 4 CN CN CN CN ELECTRONIC CONTROL P.C. BOARD POWER MONITOR, RECEIVER P.C.BOARD REMOTE CONTROLLER BLK GRY YLW BRN WHT RED RT RT RT MF SYMBOL C F F HIC MF MV MV NAME INDOOR FAN CAPACITOR FUSE (.5A) THERMAL FUSE (9:) DC/DC CONVERTER INDOOR FAN MOTOR VANE MOTOR (HORIZONTAL) VANE MOTOR (VERTICAL) SYMBOL NAME NR VARISTOR ROOM TEMPERATURE RT THERMISTOR INDOOR COIL RT THERMISTOR (MAIN) INDOOR COIL RT THERMISTOR (SUB) SYMBOL NAME SR4 SOLID STATE RELAY TB TERMINAL BLOCK 5C CONTACTOR NOTE:. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only. (For field wiring). Symbols below indicate. /: Terminal block, : Connector 0

11 MUZ-A09RV- E MUZ-ARV- E MODELS WIRING DIAGRAM OUTDOOR UNIT GRN LD-E DSA6 NR6 NOISE FILTER P.C BOARD R65 CT6 TAB6 V TB RED 0-40V ~ N WHT BLU X64 TAB6 FROM INDOOR UNIT CONNECTING L6 LDNF BLU BLU TAB7 SSR6 CN9 GRN/YLW TAB7 F90 S4 C65 L6 LDNF WHT RELAY P.C BOARD ORG WHT TAB68 TAB69 CN 9 X6 X6 4 BLK RED YLW 5 5 MF6 CN94 CN9 6 LD6 WHT LD6 BLU 4 4 CN77 CN779 CN778 CN76 R6 R6 C6 C6 IC950 TRANS ELECTRONIC CONTROL P.C BOARD CN60 CN64 PFC + + F80 R CN P N ~ ~ U V IPM W RT64 RT6 RT6 CN74 TAB75 TAB76 LD65 LD66 LD67 V 6 GRY TB BLK RED LEV GRY BLK WHT BLK RED WHT BLK MC W L64 U SYMBOL CT6 C6,C6 C65 DSA6 F80 F90 IC950 IPM LEV L6 NAME CURRENT TRANSFORMER SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE (A) FUSE (A) DC/DC CONVERTER INTELLIGENT POWER MODULE EXPANSION VALVE COIL CMC COIL SYMBOL NAME L6 COIL L64 REACTOR MC COMPRESSOR MF6 OUTDOOR FAN MOTOR (INNER FUSE) NR6 VARISTOR PFC POWER FACTOR CONTROL MODULE RT6 DISCHARGE TEMPERATURE THERMISTOR RT6 DEFROST THERMISTOR RT64 FIN TEMPERATURE THERMISTOR R6,6 CURRENT-DETECTING RESISTOR SYMBOL NAME R64 CURRENT-DETECTING RESISTOR R65 SSR6 TB, TB TERMINAL BLOCK X6, X6 RELAY X64 S4 CURRENT-LIMITING RESISTOR SOLID STATE RELAY RELAY R.V. COIL (COOLING TURN ON) NOTE:. 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

12 7 REFRIGERANT SYSTEM DIAGRAM MSZ-A09RV - E MSZ-ARV - E Unit : mm MUZ-A09RV - E MUZ-ARV - E INDOOR UNIT Refrigerant pipe [9.5 (Option) Muffler 4-way valve OUTDOOR UNIT Indoor heat exchanger Indoor coil thermistor RT(main) Distributor Indoor coil thermistor RT(sub) Room temperature thermistor RT Flared connection Stop valve (with service port) Accumulator Discharge thermistor RT6 Maffler Compressor Defrost thermistor RT6 Outdoor heat exchanger Capillary tube ( pcs) [.0o[.0o00 Flared connection Capillary tube [.0o[.0o00 Expansion valve Refrigerant pipe [6.5 (Option) Stop valve Refrigerant flow in cooling Refrigerant flow in heating MAX. REFRIGERANT PIPING LENGTH Model MAX. HEIGHT DIFFERENCE Additional piping Max. length :mm A Piping size O.D : mm Length of connecting pipe : m Gas Liquid Indoor unit Outdoor unit Liquid: 0.5 Gas : Indoor unit Height difference should be within 5m regardless of which unit, indoor or outdoor position is high. w Max. Height difference 8m Refrigerant Piping Max. length A Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R40A:g) Model MSZ-A09RV- E MSZ-ARV- E MSZ-A09RV- E MSZ-ARV- E Outdoor unit precharged 00 Refrigerant piping length (one way) 8m 9m 0m m For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant inside the cylinder and the outdoor unit. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly. 7m m 50 Calculation : Xg=0g /m (A-7)m

13 8 PERFORMANCE CURVES MSZ-A09RV - E MUZ-ARV - E MSZ-ARV - MUZ-ARV - E 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 ~ 64V, 50Hz () AIR FLOW Air flow should be set at MAX. () MAIN READINGS () Indoor intake air wet-bulb temperature ::WB () Indoor discharge air wet-bulb temperature ::WB () Outdoor intake air dry-bulb temperature ::DB (4) Total input :W (5) Indoor intake air dry-bulb temperature ::DB (6) Outdoor intake air wet-bulb temperature ::WB (7) Total input :W } Cooling } Heating Indoor air wet-bulb temperature difference on the left side of the chart on page 4 and 5 shows the difference between the indoor intake air wet-bulb temperature and the indoor discharge air wet-bulb temperature for your reference at service. How to measure the indoor air wet-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 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. 4. 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. INDOOR UNIT OUTDOOR UNIT

14 Cooling capacity MSZ-A09RV- E MSZ-ARV- E MUZ-A09RV - E MUZ-A09RV - E.5 Correction of Cooling capacity.0 Correction of total input Capacity correction factors (Hz) Capacity correction factors (Hz) The operational frequency of compressor The operational frequency of compressor MUZ-ARV - E MUZ-ARV - E.5 Correction of Cooling capacity.0 Correction of total input Capacity correction factors Capacity correction factors (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor 4

15 Heating capacity NOTE:The above curves are for the heating operation without any frost MSZ-A09RV- E MSZ-ARV- E MUZ-A09RV - E MUZ-A09RV - E.5 Correction of Heating capacity.5 Correction of total input Capacity correction factors Capacity correction factors (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor MUZ-ARV - E MUZ-ARV - E.5 Correction of Heating capacity.5 Correction of total input Capacity correction factors Capacity correction factors (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor 5

16 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT How to operate with fixed operational frequency of the compressor.. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either the COOL mode or the HEAT mode before starting to operate the air conditioner.. The compressor starts up. The operational frequency of the compressor is 8Hz in the COOL mode and 58Hz in the HEAT mode.. The fan speed of the indoor unit is High. 4. This operation continues for 0minutes. 5. In order to release this operation, press the EMERGENCY OPERATION switch again, press any button on the remote controller. 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. Dry-bulb temperature Relative humidity(%) Air flow should be set at High. Operational frequency : 8Hz (Reference) (kgf/f [Gauge]) (MPa [Gauge]) Outdoor low pressure MUZ-A09RV - E 6Hz (%) Ambient temperature(:) Ambient humidity(%) 5(: Outdoor unit current (A) 5 4 MUZ-A09RV - E V 0 70(%) Ambient temperature(:) Ambient humidity(%) 5Hz 40V 5(:) MUZ-ARV - E (Reference) (kgf/f [Gauge]) (MPa [Gauge]). Outdoor low pressure Hz Outdoor unit current (A) MUZ-ARV - E 7 0V Hz 40V (%) Ambient temperature(:) Ambient humidity(%) 5(: (%) 5(:) Ambient temperature(:) Ambient humidity(%) 6

17 HEAT operation Condition Indoor : Dry bulb temperature 0.0: Wet bulb temperature 4.5: Outdoor : Dry bulb temperature : Wet bulb temperature 6 4.5: 6.0 MUZ-A09RV - E 6.0 MUZ-ARV - E Outdoor unit current (A) V 40V 58Hz Outdoor unit current (A) V 40V 58Hz Ambient temperature(:) Ambient temperature(:) 7

18 PERFORMANCE DATA COOL operation MSZ-A09RV - E MUZ-A09RV - E CAPACITY :.6 kw INPUT : 800 W SHF : 0.74 OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature 8

19 PERFORMANCE DATA COOL operation MSZ-A09RV - E MUZ-A09RV - E CAPACITY :.6 kw INPUT : 800 W SHF : 0.74 OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature 9

20 PERFORMANCE DATA COOL operation MSZ-ARV - E MUZ-ARV - E CAPACITY :.4 kw INPUT : 0 W SHF : 0.69 OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature 0

21 PERFORMANCE DATA COOL operation MSZ-ARV - E MUZ-ARV - E CAPACITY :.4 kw INPUT : 0 W SHF : 0.69 OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT NOTE Q : Total capacity (kw) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kw) INPUT : Total power input (W) WB : Wet-bulb temperature

22 PERFORMANCE DATA HEAT operation MSZ-A09RV - E MUZ-A09RV - E CAPACITY :.6 kw INPUT : 990 W OUTDOOR WB(:) INDOOR DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT PERFORMANCE DATA HEAT operation MSZ-ARV - E MUZ-ARV - E CAPACITY : 4.8 kw INPUT : 580 W OUTDOOR WB(:) INDOOR DB(:) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT NOTE Q :Total capacity (kw) INPUT:Total power input (W) DB : Dry-bulb temperature WB: Wet-bulb temperature

23 9 MICROPROCESSOR CONTROL MSZ-A09RV- MSZ-ARV- E E MUZ-A09RV- E MUZ-ARV- E Once the controls are set, the same operation mode can be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns off, -minute time delay will operate to protect system from overload and compressor will not restart for minutes. WIRELESS REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button OPERATION SELECT button FAN SPEED CONTROL button ECONO COOL button ON-TIMER button CLOCK SET button HR. button MIN. button (TIME SET button) AM ON/OFF CLOCK TOO WARM HR. MIN. CLOCK RESET TOO COOL MODE I FEEL COOL DRY HEAT FAN VANE ECONO COOL START PM SWING STOP TEMPERATURE buttons VANE CONTROL button SWING button OFF-TIMER button RESET button INDOOR UNIT DISPLAY SECTION GREEN SIGN GREEN SIGN shows the current room temperature and set temperature. The room temperature indicated on the temperature monitor lamp may not be exactly the same as the actual room temperature. Available the set temperature range is 6:~:, however, indication range of temperature monitor lamp is :~0:. The set temperature (lighting) and room temperature (blinking) are displayed..when the room temperature or set temperature is out of the indication range If the set temperature is lower than :, indicating lamp at : is lighting. And if the room temperature is lower than :, indicating lamp at : is blinking. If the set temperature is higher than 0:, indicating lamp at 0: is lighting. And if the room temperature is higher than 0:, indicating lamp at 0: is blinking. (Example) When the set temperature is 8:, indicating lamp at 8: is lighting. When the room temperature is 0: or higher, indicating lamp at 0: is blinking. Lighting lamp shows the set temperature GREEN SIGN Blinking lamp shows the room temperature.when the room temperature or set temperature is within the indication range (Example) When the set temperature is 6:, indicating lamp at 6: is lighting. When the room temperature is 7.5: or higher and lower than 8.5:, indicating lamp at 8: is blinking. Lighting lamp shows the set temperature GREEN SIGN Blinking lamp shows the room temperature w When the set temperature and room temperature are the same, corresponding indicating lamp is lighting. NOTE: When the unit is not operating : Both POWER MONITOR lamp and green sign lamps are off. When ON- Timer is set : POWER MONITOR lamp is on. All green sign lamps are off. When OFF- Timer is set : The lamp indication is as same as ordinary operation.

24 9-. I FEEL CONTROL ( ) OPERATION. Press OPERATE/STOP(ON/OFF) button on the remote controller. POWER MONITOR lamp of the indoor unit will turn on with a beep tone.. Press OPERATION SELECT button to set I FEEL CONTROL ( ) Then a beep tone is heard.. The operation mode is determined by the room temperature at start-up of the operation. Initial room temperature more than 5: : to 5: less than : Mode COOL mode of "I FEEL CONTROL" DRY mode of "I FEEL CONTROL" HEAT mode of "I FEEL CONTROL" Once the mode is fixed, the mode will not change by room temperature afterwards. Under the ON-TIMER ( ) operation, mode is determined according to the room temperature as the operation starts. When the system is stopped with the OPERATE/STOP(ON/OFF) button on the remote controller, and restarted within hours in I FEEL CONTROL ( ) mode, the system operates in previous mode automatically regardless of the room temperature. Example Previous operation COOL mode of I FEEL CONTROL Restart COOL mode of I FEEL CONTROL When the system is restarted after hours, the operation mode is determined by the initial room temperature at start-up of the operation. Example Previous operation COOL mode of I FEEL CONTROL or COOL mode Restart COOL or DRY or HEAT mode of I FEEL CONTROL that determined by room temperature start-up of the operation. 4. The initial set temperature is decided by the initial room temperature. Model Initial room temperature Initial set temperature COOL mode of "I FEEL CONTROL" 6: or more 6: or less 4: Initial room temperatureminus : DRY mode of "I FEEL CONTROL" HEAT mode of "I FEEL CONTROL" : to 5: : or less 4 Initial room temperatureminus : When the system is restarted with the remote controller, the system operates with the previous set temperature regardless of the room temperature at restart. The set temperature is calculated by the previous set temperature. 6:

25 5. TEMPERATURE buttons In I FEEL CONTROL (h)mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature is controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Pressing the TOO WARM or TOO COOL button emits a beep tone. Fuzzy control When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, considering the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or cold. So this is called Fuzzy control, and works only in I FEEL CONTROL mode. In DRY mode of I FEEL CONTROL, the set temperature doesn t change. TOO COOL To raise the set temperature ~ degrees (: ) TOO WARM To lower the set temperature ~ degrees (:) 9--. Cool mode of I FEEL CONTROL. Following are the fan speed in AUTO. Difference between room temperature and set temperature during operation. Temperature difference Fan speed Room temperature minus set temperature: degrees or more High Room temperature minus set temperature: degree or more and less than degrees Med. deg. 4 deg. Room temperature minus set temperature: less than degree Low. Time control deg..5 deg. When the three conditions below have been satisfied for hour and 45 minutes, compressor stops for minutes. ().Compressor has been continuously operating. ().Indoor fan speed is Low or Med. ().Room temperature is below 6:. When compressor turns off half way,.the accumulated time is cancelled. When compressor turns on again, time counting starts from the beginning. When the indoor fan speed becomes High or the room temperature exceeds 6:, time counting stops temporarily. After, when the above conditions are satisfied again, time counting restarts. The indoor fan operates at set speed.. Coil frost prevention mode The operational frequency of the compressor is controlled based on the temperature of the indoor coil thermistor(rt). Temperature of indoor coil thermistor:th approx. 8 C or above approx. 6 C to 8 C approx. C to 6 C approx. C or below The indoor fan maintains the actual speed of the moment. Operation frequency normal fixed lower at the rate of Hz/min lower at the rate of 6Hz/min Compressor is turned OFF for 5 minutes when temperature of indoor coil thermistor continues approx. C or below for 5 minutes or more DRY mode of I FEEL CONTROL The system for dry operation uses the same refrigerant circuit as the cooling circuit. The compressor and the indoor fan are controlled by the temperature. By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease. The operation of the compressor and indoor fan is as follows. Compressor operates by temperature control and time control. Set temperature is controlled to fall C as initial set temperature. Indoor fan and outdoor fan operate in the same cycle as the compressor. Operational frequency control of compressor is fixed 0Hz. NOTE Coil frost prevention during DRY mode of I FEEL CONTROL The operation is same as coil frost prevention during COOL mode of I FEEL CONTROL. 5

26 Defrosting in DRY mode The operational frequency of the compressor is controlled based on the temperature of the indoor coil thermistor (RT). Temperature of indoor coil thermistor:rt approx. 8 C or above approx. 6 C to 8 C approx. C to 6 C approx. C or below Operation frequency normal fixed lower at the rate of Hz/min lower at the rate of 6Hz/min Compressor is turned OFF for 5 minutes when temperature of indoor coil thermistor continues approx. C or below for 5 minutes or more. The indoor fan maintains the actual speed of the moment. However, it changes to Low speed when the compressor stops HEAT mode of I FEEL CONTROL. Indoor fan speed control () Indoor fan operates at the set speed by FAN SPEED CONTROL button. In Auto the fan speed is as follows. Fan speed Initial temperature difference Set temperature minus room temperature: degrees or more High Set temperature minus room temperature: Between and degrees Med. Set temperature minus room temperature: less than degree Low Difference between room temperature and set temperature during operation deg..7 deg. deg. 4 deg. () Cold air prevention control When the compressor is not operating, () if the temperature of indoor coil thermistor RT is 8 C or less, the fan stops. () if the temperature of indoor coil thermistor RT is more than 8 C, the fan operates at Very Low. When the compressor is operating, () if the temperature of RT is C or more, the fan operates at set speed. () if the temperature of RT is less than C and () if the temperature of room temperature thermistor RT is 5 C or less, the fan stops. () if the temperature of room temperature thermistor RT is more than 5 C, the fan operates at Very Low. Released Cold Air Prevention RT 8: : Fan speed Set speed Very Low or stop NOTE : At initial and after defrosting, when the RT is from 8: to :, Cold Air Prevention control works. () Warm air control. When the following any condition of (a. ~ d.) and the condition of are satisfied at the same time, warm air control works. a.) when the operation mode has been changed to HEAT mode b.) when cold air prevention has been released c.) when defrosting has been finished d.) when the compressor starts in HEAT mode When the temperature of indoor coil thermistor RT is less than 7 C. When warm air control works, the fan speed changes as follows to blow out warm air gradually. Gradation of fan speed in initial <Time condition> <Indoor fan speed> less than minutes Low minutes to 4 minutes Med. more than 4 minutes High The upper limit of the fan speed in MANUAL is the set speed. The upper limit of the fan speed in AUTO is the speed decided by indoor fan speed control. When the temperature of RT has been 7 C or more, or when the set speed has been changed, this control is released and the fan speed is the set speed. (4) Flow soft control When the thermostat (compressor) is off, the indoor fan operates as follows. Compressor OFF ON Fan Very Low Set speed NOTE : When the thermostat(compressor) turns on, the fan will operate at set speed. But until cold air prevention and warm air control is released. 6

27 . High pressure protection In HEAT mode and manually-operated HEAT mode, the indoor coil thermistor detects the temperature at the indoor heat exchanger and controls the compressor rotational frequency to prevent the condensing pressure from increasing excessively.. Overload starting When the room temperature thermistor reads 8 C or above, the compressor runs with its maximum frequency regulated for minutes after the start-up. 4. Defrosting in HEAT mode () Starting conditions of defrosting a) The defrost thermistor attached to the outdoor heat exchanger read - C or below. b) The cumulative operation time of the compressor has reached any of the set values: 0, 40, 45, 55, 65, 75, 85, 95, 05, 5 minutes. c) More than 5 minutes have passed since the start-up of the compressor. When the above three conditions, a), b), and c), are satisfied, the defrosting starts. wset value of compressor operation time(hereinafter referred to as defrost interval) The first defrost interval is 40 minutes long, and the second 45 minutes long.the third and subsequent intervals are set to be longer, and less frequent, depending on defrosting time. The third and subsequent defrost intervals follow any of the three patterns 5 or 0 minutes longer, the same, or 5 or 0 minutes shorter compared with the previous defrost interval with the longest 5 minutes and the shortest 0 minutes. () Releasing conditions of defrosting Defrosting is released when any of the following condition is satisfied: a) The defrost thermistor reads C or above. b) Defrosting time has exceeded 0 minutes. c) Some other mode than HEAT mode is set during defrosting. Time chart of defrosting in HEAT mode (reverse type) Vertical vanes rmal Horizontal rmal Indoor fan Very Low (temperature of indoor coil thermistor > 8:) STOP rmal <outdoor unit> 0 seconds MAX Hz 00Hz MAX Hz Compressor normal 0 second seconds 5 seconds 0 seconds 5 seconds second second Outdoor fan moter rmal rmal OFF 4-way valve ON OFF ON 7

28 9-. COOL ( ) OPERATION () Press OPERATE/STOP(ON/OFF) button.power MONITOR lamp of the indoor unit turns on with a beep tone. () Select COOL mode with the OPERATION SELECT button. () Press TEMPERATURE buttons (TOO WARM or TOO COOL button)to select the desired temperature. The setting range is 6 ~ C Indoor fan continues to operate regardless of thermostat s OFF-ON. Coil frost prevention is same as COOL mode of I FEEL CONTROL. 9-. DRY ( ) OPERATION () Press OPERATE/STOP(ON/OFF) button. POWER MONITOR lamp of the indoor unit turns on with a beep tone. () Select DRY mode with the OPERATION SELECT button. () The microprocessor reads the room temperature and determines the set temperature. Set temperature is as shown on the right chart. (4) DRY operation will not work when the room temperature is C or below. Set temperature : Set temperature and initial room temperature in dry mode HEAT ( ) OPERATION () Press OPERATE/STOP(ON/OFF) button. Initial room temperature POWER MONITOR lamp of the indoor unit turns on with a beep tone. () Select HEAT mode with the OPERATION SELECT button. () Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 6 ~ C. : 9-5. FAN MOTOR CONTROL. Rotational frequency feedback control The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feedback the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (High,Med.,Low) the microprocessor controls SR4 and adjusts fan motor electric current to make the current rotational frequency close to the target rotational frequency. With this control, when the fan speed is switched, the rotational frequency changes smoothly. High Med. Low High. Fan motor lock-up protection When the rotational frequency feedback signal is not output for seconds, (or when the microprocessor cannot detect the signal for seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut off. minutes later, the electric current is applied to the fan motor again. During the fan motor lock-up, the POWER MONITOR lamp flashes to show the fan motor abnormality. (See page 4.) 8

29 9-6. AUTO VANE OPERATION. Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. V) transmitted from indoor microprocessor.. The horizontal vane angle and mode changes as follows by pressing the VANE CONTROL button.. Positioning The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle. The positioning is decided as follows. (a) When the OPERATE / STOP(ON / OFF) button is pressed.(power ON/OFF) (b) When the vane control is changed AUTO to MANUAL. (c) When the SWING is finished. (d) When the test run starts. (e) When the power supply turns ON. 4. VANE AUTO ( ) mode In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum room-temperature distribution. () In COOL and DRY operation Vane angle is fixed to Angle. () In HEAT operation Vane angle is fixed to Angle Dew prevention During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation time exceeds hour, the vane angle automatically changes to Angle for dew prevention. 6 SWING MODE ( ) By pressing the SWING button, vane swings horizontally. The remote controller displays. SWING MODE is cancelled when any of the following operations are performed. The unit is turned off. The vertical vanes will return to their positions just before the swing operation was started. The operation mode(auto, COOL, DRY or HEAT)is changed. The vertical vanes will return to their positions just before the swing operation was started. The SWING button is pressed. The vertical vanes stop at the position when the button is pressed. 9

30 7 Horizontal AIR FLOW ( ) The vertical vane angle changes as follows by pressing the SWING button. Press the SWING button. The vertical vanes begin moving. When the vertical vanes move to the desired position, press the SWING button again. The vertical vanes stop moving. NOTE If the SWING button is not pressed again within 0 seconds in COOL or DRY mode or within minute in HEAT mode after the vertical vanes start moving, the vertical vanes will automatically return to their original positions. Horizontal AIR FLOW blowing range About 00- COOL and DRY About 50- HEAT 8. Cold air prevention in HEAT operation. When any of the following conditions occurs in HEAT operation, the vane angle changes to Angle automatically to prevent cold air blowing on users. Compressor is not operating. ➁ Defrosting is performed. ➂ Indoor coil thermistor RT reads 4: or below. ➃ Indoor coil thermistor RT temperature is raising from 4 C or below, but it does not exceed 8:. 9. ECONO COOL ( ) operation (ECONOmical operation) When the ECONO COOL button is pressed in COOL mode, set temperature is automatically set C higher than that in COOL mode. Also the horizontal vane swings in various cycle according to the temperature of indoor heat exchanger(rt). SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher than that in COOL mode, the air conditioner can keep comfort. As a result, energy can be saved. ECONO COOL operation is cancelled when the ECONO COOL button is pressed once again or VANE CONTROL button is pressed or change to other operation mode. NOTE : ECONO COOL operation not work in COOL mode of I FEEL CONTROL. Indoor coil thermistor RT temperature Released Cold Air Prevention NOTE: If the temperature of RT reads from 4: to 8: at the air conditioner starting, this control works. SWING operation In swing operation of ECONO COOL mode, the initial air flow direction is adjusted to Horizontal. According to the temperature of indoor coil thermistor RT at starting of this operation, next downward blow time is decided. Then when the downward blow has been finished, next horizontal blow time is decided. For initial 0 minutes the swing operation is performed in table G~H for quick cooling. Also, after 0 minutes when the difference of set temperature and room temperature is more than :, the swing operation is performed in table D~H for more cooling. The air conditioner repeats the swing operation in various cycle as follows. 4: 8: Horizontal vane Set position Angle Temperature of indoor coil thermistor RT Downward blow time (sec.) Horizontal blow time (sec.) A 5 C or less B 5 C to 7 C 5 0 C 7 C to 8 C 8 7 D 8 C to 0 C 4 E 0 C to C 4 F G H C to C C to 4 C more than 4 C

31 9-7. TIMER OPERATION. How to set the timer () Press OPERATE/STOP(ON/OFF) button to start the air conditioner. () Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially AM0:00 blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button. () Press ON or OFF TIMER buttons to select the operation. button... AUTO START operation (ON timer) button... AUTO STOP operation (OFF timer) (4) Press HR. and MIN. button to set the timer. Time setting is 0-minute units. HR. and MIN. button will work when or mark is flashing. These marks disappear in minute. After setting the ON timer, check that POWER MONITOR lamp of the indoor unit lights. NOTE : Be sure to place the remote controller at the position where its signal can reach the air conditioner even during TIMER operation, or the set time may deviate within the range of about 0 minutes. NOTE : Reset the timer in the following cases, or the set time may deviate and other malfunctions may occur. A power failure occurs. The circuit breaker functions.. Cancel TIMER setting can be cancelled with the ON or OFF TIMER buttons. ( or ) To cancel the ON timer, press the button. To cancel the OFF timer, press the button. TIMER is cancelled and the display of set time disappears. PROGRAM TIMER The OFF timer and ON timer can be used in combination. and display shows the order of the OFF timer and ON timer operation. (Example ) The current time is 8:00 PM. The unit turns off at :00 PM, and on at 6:00 AM. (Example ) The current time is :00 AM. The unit turns on at 5:00 PM, and off at 9:00 PM. NOTE : TIMER setting will be cancelled by power failure or breaker functioning.

32 9-8. EMERGENCY-TEST OPERATION In case of test run operation or emergency operation, use the EMERGENCY OPERATION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote controller run down. The unit will start and the POWER MONITOR lamp will light. The first 0 minutes of operation is the test run operation. This operation is for servicing. The indoor fan speed runs at High speed and the system is in continuous operation. (The thermostat is ON.) After 0 minutes of test run operation the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of 4 C. The fan speed shifts to Med. speed. The coil frost prevention works even in emergency operation, and defrosting too. In the test run or emergency operation, the horizontal vane operates in VANE AUTO mode. Emergency operation continues until the EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller. In case of latter normal operation will start. NOTE : Do not press the EMERGENCY OPERATION switch during normal operation. Lighting lamp shows the set temperature Blinking lamp shows the room temperature Press once < Cooling > GREEN SIGN EMERGENCY OPERATION switch Press again < Heating > GREEN SIGN Press once again < Stop > GREEN SIGN POWER MONITOR LAMP Light up Blinking light Color of the lamp RED ORANGE GREEN Operating condition The unit operates at high power. The unit operates at middle power. The unit operates with energy-saving. The color of POWER MONITOR lamp is GREEN in any of the following cases. When ON-timer is standby In DRY operation In EMERGENCY operation When defrosting of the outdoor unit is being done in HEAT operation

33 9-0. Operational frequency control of outdoor unit. Outline The operational frequency is decided by following the procedures below: First, set the target operational frequency based on the difference between the room temperature and the set temperature. Second, regulate the target operational frequency by discharge temperature protection, high pressure protection, electric current protection and overload protection and also by the maximum/minimum frequency. () maximum/ minimum frequency in each operation mode. Model MSZ-A09RV MSZ-ARV COOL (indoor fan speed : High) Minimum frequency 5 5 Rating frequency 5 8 Maximum frequency Minimum frequency 6 6 HEAT Rating frequency Maximum frequency 98 5 DRY /7 /7 w The maximum frequency in COOL mode is limited according to operation hours, as shown below. Maximum frequency frequency Hr Rating or under-rating frequency Time () Frequency change speed During increasing frequency Operational frequency 0Hz to 4Hz 5Hz to 79Hz 80Hz to 50Hz MUZ-A09RV- E MUZ-ARV- E 0.5 sec./hz 5 sec./hz 0.5 sec./hz During decreasing frequency Operational frequency 0Hz to 4Hz 4Hz to 50Hz MUZ-A09RV- E MUZ-ARV- E sec./hz 0.5 sec./hz

34 9-.Electronic expansion valve control (LEV control) ()Outline of LEV control The LEV basic control is comprised of setting LEV opening degree to the standard opening degrees set for each operational frequency of the compressor. However, when any change in indoor/outdoor temperatures or other factors cause air conditioning load fluctuation, the LEV control also works to correct LEV opening degree based on discharge temperature (Shell temperature) of the compressor, developing the unit s performance. ()Specification of LEV control standard specification Control range Actuating speed Opening degree adjustment from min. pulse to max. 500 pulse. LEV opens 40 pulse/sec. and close 90 pulse/sec. LEV opening degree is always adjusted in opening direction. (When reducing the opening degree, LEV is once overclosed, and then adjusted to the proper degree by opening. Unit OFF LEV remains at max. opening degree (reaches max. opening degree approx. 5 minutes after compressor stops) Remote controller ON LEV is positioned. (first full-closed at zero pulse and then positioned.) During to 5 minutes after compressor starts Opening degree is adjusted according to standard opening degree. (Standard opening degree is set for each rotational frequency of compressor) general operation More than 5 minutes have passed since compressor start-up LEV opening degree is corrected to get target discharge temperature of compressor. (For discharge temperature lower than target temperature, LEV is corrected in closing direction.) (For discharge temperature higher than target temperature, LEV is corrected in opening direction.) wit may take more than 0 minutes to reach target temperature, depending on operating conditions. Thermostat OFF LEV starts to open every pulse/sec. from the same opening degree as that when the Unit turned IFF (and becomes full-opened after approx. 5 minutes.) Thermostat ON LEV is controlled in the same way as that is after the compressor has started up. Defrosting in HEAT mode LEV is adjusted to open 50 pulse. 4

35 () Time chart Air conditioner ON LEV opening degree Positioning Standard opening degree Opening degree is corrected according to discharge temperature Air conditioner OFF (thirmostat off) Commanded to open The operational frequency of the compressor ON 5 min. Time OFF Time (4) Control data (a) Reference value of target discharge temperature (Cooling :/Heating :) A 58/49 B 60/58 C 68/67 D 70/70 E 7/7 F 7/7 LEV opening degree E D C B A(target discharge temperature) F (Hz) The operational frequency of the compressor In COOL mode, the two indoor coil thermistor (one main and one sub) sense temperature ununiformity (super heat) at the heat exchanger, and when temperature difference have developed, the indoor coil thermistors adjust LEV opening to get approximate 0 degrees lower temperature than the target temperature in the table above, thus diminishing super heat. (b) Reference value of LEV standard degree opening (COOL/HEAT pulse) /80 50/00 00/0 00/0 00/0 00/0 5

36 9-.Outdoor fan motor control The AC fan motor turns ON/OFF, interlocking with the compressor. [ON] The AC fan motor turns on 5 seconds before the compressor starts up. [OFF] The AC fan motor turns off 5 seconds after the compressor stops running. ON 5 sec. 5 sec. Compressor OFF ON Outdoor fan OFF way valve control COOL&DRY mode ON(voltage applied) The 4-way valve turns ON as soon as thermostat turns ON. The 4-way valve turns OFF 5 minutes after the thermostat turns OFF. HEAT mode OFF(voltage not applied) During normal HEAT operation the 4-way valve is OFF. w The 4-way valve does not turn ON before the compressor starts up. <COOL> 5 seconds <HEAT> 5 seconds Compressor 4-way valve Outdoor fan ON OFF ON OFF ON OFF 6

37 9-4. Indoor fan motor control The detected rotational frequency of the fan motor is feed backed to the microprocessor and then the microprocessor works to keep the rotational frequency at a fixed value against load fluctuation. () Circuit block diagram every 00Hz pulse output Microprocessor AC motor actuator (SSR) SSR output AC motor Rotational frequency 0~40V AC Rotational frequency sensor part controller board Output Input () Control system <Output side> The microprocessor outputs pulse every 00Hz (every 50Hz in half wave). (Fan speed varies according to the time span between a Zero-cross point on the commercial wave and a pulse out put point.) The microprocessor drives SSR on relay P.C. board. Controlled voltage is applied to AC fan motor. <Input side> The microprocessor detects rotational frequency of AC fan motor, using Hall element in AC fan motor. The microprocessor adjusts rotational frequency. If feed backed pulses are not detected for seconds, fan motor becomes abnormal and indoor POWER MONITOR lamp flashes to show abnormality. 7

38 0 SERVICE FUNCTIONS MSZ-A09RV - E MUZ-A09RV - E MSZ-ARV - MUZ-ARV - E 0-. CHANGE IN DEFROST SETTING <JP7> When the JP7 wire of the outdoor electronic control P.C. board is cut, the defrost temperature will be changed. (Refer to page 55.) Jumper wire Change point JP7 Deforst finish temperature changes from : to 5:. 0-. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board. The time will be shortened as follows. (Refer to page 54.) Set time : minute -second Set time : minute -second (It takes minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.) 0-. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the indoor unit number. How to modify the remote controller P.C. board Remove batteries before modification. The board has a print as shown below; NOTE : Fore re-modelling, take out the batteries at first. After finish re-modelling, put back the batteries then push the RESET-button. The P.C. board has the print J and J. Jumper wires are mounted to each J and J.Cut J and J according to the number of indoor unit as shown in Table. After modification, push the RESET. button near the MIN-button on the remote controller. Table.. unit. unit. unit.4 unit unit operation modification unit operation Same as at left Cut J unit operation Same as at left Same as at left Cut J 4 unit operation Same as at left Same as at left Same as at left Cut both J and J How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit. The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker has turned off, or the power supply has shut down. Please conduct the above setting once again after the power has restored. 8

39 0-4. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C.board. The AUTO RESTART FUNCTION sets to work the moment the power has restored after power failure, then, the unit will restart automatically. If the unit is operated in I FEEL CON- TROL. mode before power failure, the operation is not memorized. In I FEEL CONTROL. mode, the operation is decided by the initial room temperature at (re)start. How to set AUTO RESTART FUNCTION Turn off the main power for the unit. Remove the indoor electronic control P.C. board and the display P.C.board.(See page 57.) Pull the indoor electronic control P.C. board forward and cut the RESISTOR JR07 on it. C CN CN0 5C SW IC0 CN CN CN CN5 JR07 Operation If the main power (0-40V AC) has been cut, the operation settings remain. After the power is restored, the unit restarts automatically according to the memory.(however, it takes at least minutes for the compressor to start running.) NOTE: The operation settings are memorized when 0 seconds have passed after the indoor unit was operated with the remote controller. If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled. If the unit has been off with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is off. To prevent breaker off due to the rush of starting current, systematize other home appliances not to turn on at the same time. When some air conditioners are connected to the same supply system, if they are operated before power failure, the starting current of all the compressors may flow simultaneously at restart. Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one. 9

40 TROUBLESHOOTING MSZ-A09RV - E MSZ-ARV - E MUZ-A09RV - E MUZ-ARV - E -. 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 first turn off the remote controller to stop the unit, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug. ) Be sure to unplug the power cord before removing the front panel, the cabinet, the top panel, and the P.C. boards. ) When removing the P.C. board, hold the edge of the board with care NOT to apply stress on the components. 4) When connecting or disconnecting the connectors, hold the housing of the connector, DO NOT pull the lead wires. Lead wiring Housing point. Caution for the outdoor unit repair service ) Do not load on the P.C.board cover. ) Since every P.C.board circuit links directly with power supply 0~40V AC, do not short the P.C.board and metal section on servicing. Also if touch the parts on the P.C.board, it may cause an electric shock. ) When closing the P.C.board cover, prevent a foreign matter or dust from coming inside the P.C.board. Cover Electronic control P.C. board Relay P.C. board. Troubleshooting procedure ) First, check if the POWER MONITOR 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. ) Before servicing check that the connector and terminal are connected properly. ) If the P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration. 4) When troubleshooting, refer to the flow chart on page 4 and the check table on page 4 and How to replace batteries Weak batteries may cause the remote controller malfunction. In this case, the remote controller can not be repaired only by the battery replacement. To operate the remote controller normally, replace the batteries in the following order. This remote controller has the RESET button. After refilling new batteries, press the RESET button with tip end of ball point pen or the like, and then use the remote controller. Remove the back lid and replace batteries. Press the RESET button. Then re-attach the back lid. Insert the negative pole of the batteries first. Check if the polarity of the battereis is correct. RESET button 40

41 -. Troubleshooting procedure The following procedure facilitates identifying defective points. The abnormalities in can be located in the Troubleshooting check table on page 4~4. Operation start Indoor unit dose not respond to remote controller. Power monitor lamp flashes. Indoor unit does not respond to remote controller. In addition, operation Power monitor lamp dose not light up, with emergency operation switch ON. time flash.5 seconds OFF Refer to G Check of indoor electronic control P.C. board on page 49. Refer H Check of indoor electronic P.C. board on page 50. Indoor fan motor dose not run. -time flash.5 seconds or 0.5 seconds OFF Cause:indoor/outdoor unit Mis-wiring Serial signal error Refer to Checking serial signal error on page 44. time flash.5 seconds OFF Check : indoor/outdoor Mis-wiring on page 44. Cause: in Indoor unit Main indoor coil thermistor abnormality Room temperature thermistor abnormality Sub indoor coil thermistor abnormality Check : Main indoor coil thermistor Room temperature thermistor Sub indoor coil thermistor 5-time flash.5 seconds OFF 6-time flash.5 seconds OFF -time flash.5seconds OFF Cause: in outdoor unit Outdoor power system abnormality Outdoor unit temperature thermistor abnormality Outdoor converter power system abnormality. Refer to I Check of outdoor thermistors on page 50. Refer to F Check of indoor fan motor on page time flash.5 seconds OFF Cause: in outdoor unit Outdoor control system error Check : Outdoor electronic control P.C. board. Inverter/Compressor Refer to A ~ E Compressor on page 47 and 48. Refer to A ~ E Transistor module on page 47 and 48. Refer to J Check of R.V. coil on page 5. Refer to K Check of outdoor fan motor on page 5. win case of serial signal error, the mis-wiring indication will appear by turning the power off and then turning it back on. Refer to L 'Check of power supply' on page 5. Outdoor electronic control P.C. board. Refer to N Check of electronic control P.C. board in the outdoor unit on page 5. Refer to P Check of linear expansion valve (LEV) on page 5. 4

42 . Troubleshooting check table (Indoor unit troubleshooting check table) MSZ-A09RV - E MSZ-ARV - E flash Flashing of the POWER MONITOR lamp indicates possible abnormalities. The POWER MONITOR lamp is lighting during normal operation.. Symptom POWER MONITOR lamp Abnormal point Detection method Checkpoint Outdoor unit does not operate repeated flashes every 0.5 seconds Mis-Wiring When indoor electronic control P.C. board does not receive serial signals for 4 to 5 seconds with OPERATION/STOP(ON/OFF) button of remote controller ON and 5C relay ON for the first time, NOTE: In case of serial signal error, mis-wiring indication will appear by turning power off and then turning it back on. Refer to 'Checking serial signal error' on page 44. w -time flash.5 seconds OFF Serial signal When indoor electronic control P.C. board does not receive serial signals from outdoor unit for 4 to 5 seconds. w -time flash.5 seconds OFF Main indoor coil thermistor Sub indoor coil thermistor Room temperature thermistor Indoor electronic control P.C. board constantly detects resistance every 8 seconds. When thermistor shorts or opens. Refer to the characteristics of main indoor coil thermistor, sub indoor coil thermistor and room temperature on page 54. w4 -time flash.5 seconds OFF Indoor fan motor When rotational frequency feedback signal is not emit during -second indoor fan operation. Refer to F "Check of indoor fan motor" on page time flash.5 seconds OFF Outdoor power system When compressor has stopped due to overcurrent protection or start-up failure protection times in a row within min. after start-up. Refer to "How to check inverter/compressor" on page time flash.5 seconds OFF Outdoor thermistors <Thermistor short> Thermistors are abnormal when they short after compressor start-up. <Thermistor open> Thermistors are abnormal when they open after compressor start-up. However, discharge temperature thermistor is abnormal when open circuit is detected more than 0 min. after compressor start-up. Shortage of refrigerant Outdoor electronic control P.C. board Refer to I "Check of outdoor thermistors" on page time flash.5 seconds OFF Outdoor control system When nonvolatile memory data cannot be read properly on outdoor electronic control P.C. board, outdoor unit stops and restarts minutes later, Replace outdoor electronic control P.C. board. 8 -time flash.5 seconds OFF Converter power system When the converter protective suspension within minute after start-up of the converter is operated 5 times successively. Also bus-bar voltage malfunction (40V or less or 400V or more) within minute after start-up of the converter has happened 5 times successively. Refer to N "Check of outdoor electronic control P.C.board" on page 5. wwhen the indoor unit has started operation and the above detection method has detected an abnormality (the first detection after the power ON), the electronic control P.C. board turns OFF the 5C and the indoor fan motor with the operation indicator lamp lighting. When the 5C and the indoor fan motor are turned ON again minutes later and the same abnormality is detected (a second detection of the above abnormality after the power ON), the control P.C. board turns OFF the 5C and the indoor fan motor with the operation indicator lamp flashing. However, the first detection is cleared in case the power is turned OFF after the first detection. 4

43 (Outdoor LED indication table) MUZ-A09RV - E MUZ-ARV - E NOTE. The location of LED is illustrated at the right figure.. LED lights up during normal operation. <Outdoor electronic control P.C. board> Flashing IPM PFC LED Symptom LED indication Abnormal point Detection method Checkpoint Converter power system Outdoor unit does not operate 'Outdoor unit stops and restarts min. later' is repeated Outdoor unit operates (at low frequency) -time flash every.5 seconds NOTE: For abnormality location, refer to 'Indoor troubleshooting check table' on page 4. -time flash.5 seconds OFF -time flash.5 seconds OFF 4-time flash.5 seconds OFF 5-time flash.5 seconds OFF 7-time flash.5 seconds OFF 8-time flash.5 seconds OFF -time flash.5 seconds OFF -time flash.5 seconds OFF 4-time flash.5 seconds OFF Outdoor power system Outdoor thermistors Outdoor control system Over current protection Discharge temperature overheat protection Fin temperature thermistor overheat protection High pressure protection Mis-start up protection Position detection protection Frequency drop by current protection Frequency drop by high pressure protection Frequency drop by defrosting in COOL mode Frequency drop by, discharge temperature protection When the converter protective suspension within minute after start-up of the converter is operated 5 times successively. Also bus-bat voltage malfunction (40V or less or 400V or more) within minute after- start-up of the converter has happened 5 times successively. When compressor has stopped by overcurrent protection or start-up failure protection within min. after compressor startup times in a row, compressor stops and then restarts min. later. When discharge temperature thermistor or fin temperature thermistor shorts or opens during compressor running, compressor stops and restarts min. later. When nonvolatile memory date cannot be read properly, compressor stops and restarts min. later. When 9A current flows into power transistor, compressor stops and restarts min. later, When discharge temperature thermistor exceeds 6:, compressor stops and restarts min. later. (Compressor restarts when discharge temperature thermistor reads 00: or below.) When temperature at heat sink exceeds 88: or outdoor electronic control P.C. board exceeds 67:, compressor stops and restarts min. later. When indoor coil thermistor exceeds 75:, compressor stops and restarts min. later. When switching from forced drive to normal drive (synchronised operation by a position detectable signal) failed 5 times successively at compressor start-up. Restart-up after suspension when miss start-up or abnormal position detecting within 0 seconds after start-up. When the position detectable signal is not input during normal starting up (synchronised operation by a position detectable signal) after 0 seconds of compressor operation. When current from power outlet exceeds 0. A, compressor frequency lowers. When indoor coil thermistor exceeds 55: in HEAT mode, compressor frequency lowers. When indoor coil thermistor reads 8: or below in COOL mode, compressor frequency lowers. When discharge temperature thermistor exceeds :, compressor frequency lowers. Refer to N 'Check of electronic control P.C. board on page 5. Refer to 'Checking inverter/ compressor on page 47. Refer to I 'Check of outdoor thermistors' on page 50. Replace outdoor electronic control P.C. board. Refer to A-E in 'How to check inverter/ compressor' on page 47~ 48. Check refrigerant circuit and refrigerant amount. Refer to I'Check of outdoor thermistor' on page 50. Check around outdoor unit. Check outdoor unit air passage. Check refrigerant circuit and refrigerant amount. Check stop valve. Check and replace as follows. Check the compressor connecting lead wire between connector and transistor module. Check outdoor electronic control P.C. board. (Position detecting circuit IPM, Micro computer, etc) Compressor replacement Refer to A~E Inverter Compressor simple check method on page 47 and 48. The unit is normal, but check the following. Check if indoor filters are clogged Check if refrigerant is short. Check if indoor/outdoor unit air outlets are short cycled. Refer to I 'Check of outdoor thermistors' on page Outdoor unit operates 5-time flash.5 seconds OFF 7-time flash.5 seconds OFF 8-time flash.5 seconds OFF 9-time flash.5 seconds OFF Outdoor thermistors Defrost thermistor low discharge temperature protection Converter protection Inverter check mode When defrost thermistor short or open. w In this case, compressor continues running. When discharge temperature has been 50: or below for 0 min. When the converter suspends for protection Response abnormal suspension Bus-bar voltage abnormal suspension Converter overcurrent/ over voltage protective suspension Converter current detection abnormal suspension Converter zero cross abnormal suspension When disconnecting the compressor connector, going to inverter check mode. Refer to I 'Check of outdoor thermistors' on page 50. Refer to P 'Check of LEV' on page 5. Check refrigerant circuit and refrigerant amount. Refer to N 'Check of electronic control P.C. board on page 5. Refer to A~E Inverter Compressor simple check method on page 47 and 48. 4

44 . Checking mis-wiring and serial signal error. Outdoor unit does not operate. When the POWER MONITOR lamp (on the left-hand side) flashes on and off continuously or only once.. Turn OFF power supply.. Turn ON power supply.. Press the EMERGENCY OPERATION switch. ON.5 seconds OFF ON Is the self-check function of indoor unit indicated when relay 5C turns ON min. later? wshort circuit of JPS (one-hour short circuit jumber cable) and JPG (GND resistance) enables self-check function to be indicated within min. Serial signal error indication Mis-wiring indication Correct wiring Is there indoor-outdoor mis-wiring, poor contact, or disconnection? w If there is any error in serial signal system, the mis-wiring indication will appear by turning the power off and then turning it back A B Turn off power supply and confirm that indoor-outdoor wiring is correct. Short-circuit indoor terminal block N and. While pressing OPERATE-STOP(ON/OFF) button on remote controller, press RESET button. (The above procedure allows Power monitor lamp to indicate the failure-mode) w w Mis-wiring may damage the electronic control P.C. board during the operation in the left. Be sure to confirm the wiring is correct before the operation starts. w The serial signal indication on the Power monitor lamp (right side) facilitates checking abnormality, based on the failure-mode Green Sign flash Does Power monitor lamp (on the right-hand side) flash on and off when OPERATE/STOP(ON/OFF) button on remote controller is pressed? (light up or OFF) w Replace indoor electronic control P.C. board. Open-circuit indoor terminal block N and, Check if there is amplitude of 5 to 0VDC between outdoor terminal block N and (for confirmation of serial signal) and if there is 0-40V AC between and N. w Be sure to release the failure-mode recall function after checking. Replace in-out connecting wire. Main circuit Reactor ise filter P.C. board Connection of connector defective. Unplug the power cord.. Disconnect the connector between compressor and IPM.. Plug the power cord. 4. Press EMERGENCY OPERATION switch. Is there approx. 0-40V AC between outdoor terminal block and? Is there 70V DC between both ends of smoothing capacitor(c6) on the electronic control P.C. board? Replace outdoor electronic control P.C. board. A Turn off invertercontrolled lighting equipment. Plug the power cord. Press EMERGENCY OPERATION switch. Is mis-wiring or serial signal error indicated when relay 5C turns ON min. later? B Keep the unit away from fluorescent light. Attach a filter to lightintercepting part. 44

45 . Trouble shooting procedure of main parts (Simple check method of main parts) MSZ-A09RV - E MUZ-A09RV - E MSZ-ARV - E MUZ-ARV - E Part name Room temperature thermistor(rt) Indoor coil thermistor (RT,RT) Defrost thermistor (RT6) Checking method and criterion Disconnect the connector and measure the resistance with a tester. (Part temperature : 0:~0:) rmal 8k"~0K" Abnormal Open or short circuit Disconnect the connector and measure the resistance with a tester. (Part temperature : -0:~40:) rmal 5k"~55K" Abnormal Open or short circuit Discharge temperature thermistor (RT6) Fin temperature thermistor (RT64) Compressor (MC) Disconnect the connector and measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up. (Part temperature : 0:~40:) rmal 00k"~50K" Abnormal Open or short circuit Disconnect the connector and measure the resistance with a tester. (Part temperature : -0:~80:) rmal 5k"~0K" Abnormal Open or short circuit Disconnect the connector and measure the resistance between the terminals with a tester. (Winding temperature : -0:~40:) WHT RED BLK W V U rmal Abnormal 0.8"~.0" Open or short circuit Compressor motor Indoor fan motor(mf) Measure the resistance between the terminals with a tester. (Winding temperature : 0:~0:) WHT RED BLK Terminal (CN) rmal WHT-BLK 80"~04" BLK-RED "~8" Abnormal Open or short circuit 45

46 Part name Outdoor fan motor(mf6) Checking method and criterion Measure the resistance between the terminals with a tester. (Winding temperature : -0:~40:) P Terminal rmal Abnormal WHT-BLK 7.7'~.6' BLK YLW RED ORN WHT BLK-RED 77.8'~9.9' Open or short circuit YLW-BLK.4'~4.' Horizontal vane motor(mv) Vertical vane motor(mv) Measure the resistance between the RED terminal and the other ones. (Winding temperature : 0:~0:) PNK ROTOR rmal Abnormal ORN approx. 00' in each phase Open or short circuit. RED YLW BLU Measure the resistance between the terminals with a tester. (Part temperature : -0:~40:) R.V. coil (S4) rmal 88'~079' Abnormal Open or short circuit. Linear expansion valve (LEV) WHT6 RED ORG4 LEV YLW5 BRN BLU Measure the resistance with a tester. (Part temperature : -0:~40:) Terminal (CN74) WHT-RED RED-ORN YLW-BRN BRN-BLU rmal 4'~5' Abnormal Open or short circuit 46

47 (How to check inverter/compressor) Start Disconnect the connector between compressor and IPM. Check voltage between terminals. See A 'Check of open phase.' Are voltages balanced? Check resistance of IPM. See B 'Check of IPM.' Check compressor. See C 'Check of compressor.' Is resistance infinite? Outdoor electronic control P.C. board is defective. (0~several ") Replace outdoor electronic control P.C. board and IPM. IPM is defective. A Check of open phase Be sure to use the analog voltmeter for measurement Disconnect the connector between compressor and IPM, activate the inverter and measure the balance of voltage between terminals. Output voltage : 0V << Operation method>> Start heating opration by pressing the Emergency operation switch on the indoor unit. (test-run mode) <<Measurement point>> at points BLK-WHT BLK-RED WHT-RED NOTE Measure AC voltage, at points more than one minute ofter the outdoor fan motor starts running. 9 flashes <Outdoor electronic control P.C. board> IPM PFC LED flash.5 seconds OFF te. Output voltage changes depending power supply voltage. (Max. i0%). Measure by analogue tester.. During the measurement, LED in the outdoor electronic control P.C. board flashes 9 times. B Check of IPM Disconnect the connector between compressor and IPM, and measure resistance between terminals on the IPM. <<Measurement point>> at 6 points BLK-WHT, WHT-BLK BLK-RED, RED-BLK WHT-RED, RED-WHT w Measure resistance between at 6 points the lead wires at points <<Judgment>> Infinite ["] normal 0~dozens of abnormal (short) ohmmeter indication " " X X rmal (infinite) Abnormal (0~dozens of ") 47

48 C Check of compressor Check resistance of compressor. See D 'Check of compressor winding'. Is resistance ~several " at -0: ~ 40: of winding temperature? Compressor is short or open. Replace compressor. Check compressor operation time. See E ' Check of compressor operation time,' Does compressor run continuously? Compressor is layer short or lock-out. Refrigerant circuit is defective. Replace compressor. Check refrigerant circuit. Ok D Check of compressor winding Disconnect the connector between compressor and IPM, and measure resistance between the compressor terminals. <<Measurement point>> at points BLK-WHT BLK-RED WHT-RED <<Judgment>> w Measure resistace between the lead wires at points. 0.8 to.0" at -0: to 40: of part temperature. 0["] abnormal [short] Infinite["] abnormal [open] NOTE.Be sure to zero the ohmmeter before measurement..winding resistance for each phase is 0.45" at 0:. Ohmmeter indication " " X X rmal (~several ") Abnormal (0" short) WHT RED BLK W V U Compressor motor " X Abnormal (infinite open) E Check of compressor operation time Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to overcurrent. <<Operation method>> Start heating or cooling operation by pressing the emergency operation switch on the indoor unit. (Test-run mode) <<Measurement>> Measure the time from the start of outdoor fan running till the stop of the inverter due to overcurrent. <<Judgment>> For reference 0~0 seconds abnormal (short) 0~60 seconds abnormal (compressor lock-out) 60 seconds~5 minutes abnormal (refrigerant circuit defect) more than 5 minutes normal 0 sec. 0 sec. 60 sec. 5 min. Outdoor fan starts Abnormal (Compressor short circuit or layer short) Abnormal (Compressor lock-out) Abnormal (refrigerant circuit defect, etc.) rmal 48

49 (How to check main parts) F Check of indoor fan motor Indoor fan does not operate. Are lead wires disconnected? Replace indoor fan motor. Turn off power supply and check connector CN visually. Is soldered point abnormal? Re-connect lead wires. Disconnect lead wires from CN on indoor electronic control P.C. board. Measure resistance between lead wire and and then and. Is resistance 0" (short) or " (open)? Re-solder it. Indoor electronic control P.C. board CN Replace indoor electronic control P.C. board. fan motor G Check of remote controller and indoor electronic control P.C. board. Indoor unit operates by pressing the emergency operation switch. Check the model name of remote controller. Back side of ( remote controller ) Is LCD display on remote controller visible? (not clear) Replace batteries and then press RESET button. See page 40. Model name and part. are witten here. Remove batteries, then set them back and press the reset button. Does the unit operate with remote controller? Ok Tune a radio in to AM and press OPERATE/STOP (ON/OFF)button on remote controller. Is noise heard from the radio? Replace remote controller. Are there any fluorescent lights of inverter or radio start type within meter? Re-install the unit away from the lights. Attach a filter to lightintercepting part. Replace the indoor electronic control P.C. board with power monitor, receiver P.C. board. Remote controller light-interception ihdication board 4 5 LD0 4 5 Indoor electronic control P.C. board 49

50 H Check of indoor electronic P.C. board The unit does not operate with the remote controller. The POWER MONITOR lamp does not light up either, with the Emergency operation switch on. Check both parts side and pattern side of indoor electronic control P.C. board visually. Varistor (NR) Turn off the power supply. Remove indoor fan motor connector CN and vane motor connector CN5 from the indoor electronic control P.C. board and turn on the power supply. Does the unit operate with the remote controller? Does the POWER MONITOR lamp light up by pressing the emergency operation switch? Replace the vane motor. Is winding resistance of vane motor 0 "? Be sure to check both resistance. Is winding resistance of fan motor 0 "? Indoor electronic control P.C. board Replace the fuse. Is fuse(f) blown? Be sure to check both fuse and varistor in any case. Is varistor(nr) burnt? Thermal fuse connector N Terminal block Replace the indoor electronic control P.C. board. Fuse (F) Replace the fan motor. Replace the varistor. Indoor electronic control P.C. board I Check of outdoor thermistors Thermistors in the outdoor unit are abnormal. Disconnect the connectors CN 64 and CN 64 from the outdoor electronic control P.C. board. (Check the characteristics of each thermistor.) (Defrost thermistor) Measure resistance between CN 64 and. ( ) Discharge temperature thermistor Measure resistance between CN 64 and 4. ( ) Fin temperature thermistor Measure resistance between CN 64 and. Replace the thermistor. Does the resistance of thermistor have the characteristics on page 55? Connect CN 64 and CN 64. Disconnect the connector between compressor and IPM. Turn on power supply to indoor unit and press emergency operation switch. Replace the outdoor electronic control P.C. board. Does the unit operate 0 minutes or more? Is LED in the outdoor electronic control P.C. board flashing 5 minutes? Re-connect the connector. 50

51 J Check of R.V. coil Heating operation works when cooling is expected. If the connector CN 9 is connected or the R.V. coil is open, the voltage occurs between the terminals even when the control is OFF. Disconnect connector between compressor and IPM. Turn on power supply to indoor unit, and press emergency operation switch to heating operation. Cooling operation works when heating is expected. min. after power turns on, is there voltage of 0-40V AC between CN 9 and on relay P.C. board? First, measure resistance of the R.V. coil to check if it is defective or not. If the connector CN 9 is connected or the R.V. coil is open, the voltage occurs between the terminals even when the control is OFF. Disconnect connector between compressor and IPM. Turn on power to indoor unit, and press emergency operation switch to cooling opeation. Is there voltage of 0V between CN 9 (+)and (-) on relay P.C. board? Replace the relay P.C. board. Outdoor terminal block TB Indoor -outdoor connecting wire min. after power turns on, is there voltage of 0-40V AC between CN 9 and on relay P.C. Is there voltage of V DC between CN 9 (+)and (-) on relay P.C. board? Replace the relay P.C. board. Approx. V DC voltage occurs. N The voltage is 0V Replace the R.V. coil. Replace the outdoor electrinic control P.C. board. 4-way valve AC 0-40V CN9 Relay P.C. board Replace the lead wires of R.V. coil. Re-connect connector. Replace the 4-way valve. Replace the outdoor electrinic control P.C. board. K Check of outdoor fan motor Outdoor fan motor does not work. Fan motor Disconnect connector CN 77 on relay P.C. board. Disconnect connector between compressor and IPM. Turn on power supply to indoor unit, and press emergency operation switch. Outdoor terminal block TB minutes after power turns on, is there voltage of 0-40V AC between outdoor terminal block and N? CN77 Relay P.C. board Press emergency operation switch again to check if 5C relay works. Re-connect connecting wire of indoor and outdoor unit. Replace the indoor electronic control P.C. board. Replace the relay P.C. board. Indoor-outdoor connecting wire N minites after power turns on, measure voltage between terminals of CN 77. Is there voltage of approx. 0-40V AC either between and or between and 4 or between and 5 at CN 77? Replace the lead wires of outdoor fan motor. Re-connect connector CN 77 Replace the outdoor fan motor. 5

52 (How to check power supply and others) L Check of power supply Inverter does not work. Disconnect connector between compressor and IPM. Turn on power supply to indoor unit and press emergency operation switch. minutes after power turns on, is there voltage of approx. 0-40V AC between outdoor terminal block and N? Is there approx. 70V DC between both ends of smoothing capacitor (C6) on outdoor electronic control P.C. board? Dose LED light up or flash on outdoor electronic control P.C. board.? Press emergency operation switch again to check if 5C relay works. Re-connect connecting wire of indoor and outdoor unit. Replace the indoor electronic control P.C. board. Press emergency operation switch again to check if 5C relay works. Re-connect connecting wire of indoor and outdoor unit. Replace the indoor electronic control P.C. board. Main circuit Reactor ise filter P.C. board Connection of connector defective Replace the outdoor electronic control P.C. board. 70V DC Dose LED flash or light up on outdoor electronic control P.C. board.? Flash Light up Ok C6 (+) (-) LED Repair according to the LED indication. Outdoor electronic control P.C. board M Check of thermal fuse Unplug the power cord. Is resistance between connector CN 0 on indoor electronic control P.C. board and terminal block N? Ok Indoor electronic control P.C. board. Replace thermal fuse. CN0 N Check of outdoor electronic control P.C. board Cooling/heating does not operate. (Speed of compressor rotation does not inclease.) Check the connecting CN9 in the relay P.C. board and CN76 in the outdoor electronic control P.C. board. Turn on power supply to indoor unit, and press emergency operation switch. Does the outdoor unit fan operate nomally? Check LED indication in the outdoor electronic control P.C. board. 8-time flashing Converter protect suspension. Check the outdoor fan motor. (Refer to page 46.) Except 8-time flashing Check the applicable parts by LED indication. Replace the outdoor electronic control P.C. board. 5

53 O Check of rush current limiting circuit Outdoor unit does not operate or stops immediately due to overcurrent. Start Does current limiting resistor detect 0"? NOTE : When the current limiting resistor is open, the rush current limiting relay may not be working properly. There fore confirm the limiting resistor works properly after replacing it. Replace current limiting resistor. Ok P Check of linear expansion valve (LEV) Heating/Cooling do not operate. After you have followed the entire flow chart of "Check of linear expansion valve (LEV)", be sure to follow the procedure below. Press EMERGENCY OPERATION switch. Unplug the power cord and then plug it again. Press RESET button on remote controller. Press RESET button, while pressing OPERATION SELECT button on remote controller. (All displays on operational display section are ON.) With remote controller set toward the indoor unit, press OPERATE/STOP(ON/OFF) button and confirm one beep tone. With remote controller set toward the indoor unit, OPERATE/STOP(ON/OFF) button and confirm two beep tones. LEV operates in full-opening direction. Do you hear LEV "click, click "? Do you touch LEV and feel it vibrate? Ok Is LEV connector connected? Is LEV coil properly fixed to the body? Re-connect the connector. Properly fix LEV coil to the body. Does the resistance of LEV coil have the characteristics? Replace outdoor electronic control P.C. board. Confirm again that LEV is operating. Replace LEV. (coil defect) Characteristics of LEV coil LEV (CN 74) WHT(6) RED() RED() ORE(4) YLW(5) BRN() BRN() BLU() resistance 9"~56" Do you hear LEV "click, click "? Replace LEV. Ok 5

54 TEST POINT DIAGRAM AND VOLTAGE MSZ-A09RV - E MSZ-ARV - E Indoor electronic control P.C. board Varistor (NR) Fuse 50V AC.5A } Fan motor power supply } Power supply input 0-40V AC V DC -- { + Room temperature thermistor (RT) Timer short mode point Main indoor coil thermistor (RT) Sub indoor coil thermistor (RT) Emergency operation switch + -- } 5V DC Indoor coil thermistor (RT, ) Room temperature thermistor (RT) 40 How to set Auto restart function Cut the Resistor JR07.(Refer page 9.) Resistance (k') Temperature (;)

55 Outdoor electronic control P.C.board MUZ-A09RV - E MUZ-ARV - E 0-40V AC BACK 5V DC V DC 5V DC 70V DC (C6) LED monitor lamp Power supply zero crossing signal 0-40V AC (CN76) Connector for indoor/outdoor communication LEV connector (CN74) FRONT Fin temperature thermistor(rt64) CN64 Defrost thermistor (RT6) CN64 Discharge temperature thermistor(rt6) Jumper wire for change in defrost setting(jp7). (Refer to page 8.) Resistance(k") Defrost thermistor(rt6) Temperature(:) Resistance(k") Discharge temperature thermistor(rt6) Temperature(:) Resistance(k") Fin temperature thermistor(rt64) Temperature(:) 55

56 MUZ-A09RV - MUZ-ARV - E E ise filter P.C board BACK 0-40V AC FRONT Relay P.C board 0-40V AC FRONT BACK Outdoor fan motor 0-40V AC R.V. coil 0-40V AC Power supply zero crossing signal 0-40V AC (CN9) 56

57 DISASSEMBLY INSTRUCTIONS <"Terminal with lock mechanism" Detaching points> In case of terminal with lock mechanism, detach the terminal as shown below. There are two types ( Refer to () and ()) of the terminal with lock mechanism. The terminal with no lock mechanism can be removed by pulling it out. Check the shape of the terminal and work. () Slide the sleeve and check if there is a locking lever or not. () The terminal with this connector is a terminal with lock mechanism. Sleeve Locking lever -. MSZ-A09RV - E MSZ-ARV - INDOOR UNIT OPERATING PROCEDURE Slide the sleeve. Pull the terminal while pushing the locking lever.. Removing the front panel () Remove the screw caps of the front panel. Remove the screws. () Pull the panel down to your side slightly and unhook the catches at the top. E Photo Connector Hold the sleeve, and pull out the terminal slowly. PHOTOS Front panel Screws. Removing the electronic control P.C. board and the display P.C. board. () Remove the front panel. (Refer to ) () Remove the screw of the electrical cover. Remove the electrical cover. () Remove the terminal cover. Remove the screw of the terminal block. (4) Remove the cord clamp. (5) Remove the screw of the ground wire. (6) Disconnect all the connectors and all the lead wires on the electronic control P.C. board. (7) Remove the electronic control P.C. board and the display P.C. board. Photo Ground Fan motor connector Terminal block cover Room temperature thermistor connector Indoor electronic control P.C.board Vane motor connector Terminal block cover screw Cord clamp 57

58 OPERATING PROCEDURE. Removing the electrical box () Remove the front panel. (Refer to ) () Remove the electrical cover. () Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN) and the vane motor connector (CN5) on the electronic control P.C. board. (5) Remove the screw fixing the electrical box, remove the electrical box. Photo PHOTOS Electrical box screw 4. Removing the vane motor () Remove the front panel. () Remove the screws (both upper and lower) of the vane motor, disconnect the connector. () Remove the vane motor. Photo 4 Vane motor screws Drain hose Vane motor 5. Removing the line flow fan and the indoor fan motor () Remove the front panel. (Refer to ) () Remove the electrical box. () Pull out the drain hose from the nozzle assembly, remove the nozzle assembly. (4) Remove the screws fixing the fan motor. (5) Remove the screws fixing the left side of the heat exchanger. (6) Lifting the left side of the heat exchanger. (7) Remove the hexagon socket set screws. (8) Remove the fan motor, and remove the line flow fan. Photo 5 The screws fixing the left side of the heat exchanger Indoor coil thermistor 58 Fan motor screws

59 -. MUZ-A09RV - E MUZ-ARV - OUTDOOR UNIT E OPERATING PROCEDURE. Removing the cabinet () Remove the screws fixing the top panel and top panel. () Remove the screws fixing the service panel. () Pull down the service panel and remove it from the cabinet. (4) Remove the screws fixing the cabinet. Photo Screws Photo PHOTOS Screws Screws Hook. Removing the inverter assembly () Remove the top panel, the service panel and the cabinet. () Disconnect the connectors (CN64),(CN64),(CN60) and (CN74) on the electronic control P.C. board. () Remove the connectors (CN77) and (CN9) on the relay P.C. board. (4) Remove the lead wires from the reactor(l64) on the TB. (5) Remove the screws fixing the relay panel. Screws Photo Cover screw Screws. Removing the electronic control P.C. board () Remove the top panel, service panel and the cabinet. (Refer to ) () Remove the cover. () Remove all the connectors and the terminals on the control P.C. board. (4) Remove the connector from the compressor. (5) Remove the screws fixing the PFC and IPM. (6) Remove the electronic control P.C. board from the heat sink. 4. Removing the relay P.C. board () Remove the top panel, the service panel and the cabinet. (Refer to ) () Remove all the connectors and the terminals on relay P.C. board. () Remove the relay P.C. board. 5. Removing the noise filter P.C. board () Remove the top panel, the service panel and the cabinet. (Refer to ) () Remove the electronic control P.C. board and relay P.C. board. () Remove all the connectors and the terminals on noise filter P.C. board. (4) Remove the ground wire screwed down on the relay panel. (5) Remove the noise filter P.C. board. Screws Screws Photo 4 Connector Electronic control P.C. board Relay P.C. board Heat sink ise filter P.C. board 59

60 OPERATING PROCEDURE 6. Removing the outdoor fan motor () Remove the top panel, the service panel and the cabinet. (Refer to ) () Disconnect the connector remove the clamp of fan motor lead wire. () Remove the propeller fan nut and remove the propeller fan. PHOTOS Photo 5 Set screws for outdoor fan motor Lead clamps (4) Remove screws fixing the fan motor. 7. Removing the compressor () Remove the top panel, the service panel and the cabinet. (Refer to ) () Remove the soundproof felt. () Remove the terminal cover on the compressor. (4) Remove the electrical assembly. (Refer to ) (5) Recover gas from the refrigerant circuit. (6) Disconnect the welded part of the discharge pipe. (7) Disconnect the welded part of the suction pipe. (8) Remove nuts fixing the compressor. (9) Remove the compressor. NOTE Before using a burner, reclaim gas from the pipes until the pressure gauge shows 0 kg/cm (0MPa). Use the burner under the condition that gas can be recovered even when the inner pressure rises by heat. Propeller fan Propeller fan nut Compressor nuts Welded sections 60

61 PARTS LIST MSZ-A09RV - E (WH) MSZ-ARV - E (WH) -. INDOOR UNIT STRUCTURAL PARTS 4 5 SCREW CAP 6 CATCH INDOOR UNIT HEAT EXCHANGER INDOOR UNIT STRUCTURAL PARTS NO Part. E E0 4 4 E E E E E E E Part Name INSTALLATION PLATE BOX (WH) CORNER BOX LEFT (WH) FRONT PANEL (WH) SCREW CAP (WH) CATCH GRILLE (WH) AIR FILTER CORNER BOX RIGHT (WH) DEODORIZING FILTER AIR CLEANING FILTER Symbol in Wiring Diagram Q'ty/unit MSZ-A09RV- E MSZ-ARV- E (WH) (WH) Remarks PCS/SET PCS/SET See page 65. (MAC-800DF) See page 65. (MAC-00FT) -. INDOOR UNIT HEAT EXCHANGER 4 E E E INDOOR HEAT EXCHANGER UNION (GAS) UNION (LIQUID) {9.5 {6.5 6

62 MSZ-A09RV - E (WH) MSZ-ARV - E (WH) -. INDOOR UNIT ELECTRICAL PARTS SLEEVE BEARING ROOM TEMPERATURE THERMISTOR 6-4. ACCESSORY AND REMOTE CONTROLLER PARTS FUSE 8 9 VARISTOR 5 -. INDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. NO Part. E E E E E E E E0 7 8 E E E E E E E E E E E E E E Part Name BEARING MOUNT SLEEVE BEARING LINE FLOW FAN DRAIN HOSE NOZZLE (WH) VANE UPPER (WH) VANE LOWER (WH) FUSE VARISTOR VANE CRANK SET VANE MOTOR (HORIZONTAL) VANE MOTOR (VERTICAL) INDOOR FAN MOTOR FAN MOTOR RUBBER MOUNT ELECTRIC CONTROL P.C.BOARD ELECTRIC CONTROL P.C.BOARD GREEN SIGN P.C.BOARD ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK INDOOR COIL THERMISTOR VANE MOTOR SUPPROT SET THERMAL FUSE Symbol in Wiring Diagram F NR MV MV MF RT TB RT, F MSZ-A09RV- E (WH) Q'ty/unit MSZ-ARV- E (WH).5A UP & DOWN UP & DOWN RIGHT & LEFT RC4V9 - PES/SET P Remarks AUTO RESTART Including RECEIVER P.C. BOARD AUTO RESTART Including RECEIVER P.C. BOARD RIGHT & LEFT 9; -4. ACCESSORY AND REMOTE CONTROLLER PARTS E E REMOTE CONTROLLER REMOTE CONTROLLER HOLDER 6

63 -5. OUTDOOR UNIT STRUCTURAL PARTS MUZ-A09RV - E MUZ-ARV - E Part numbers that are circled are not shown in the illustration. Symbol NO. Part. Part Name in Wiring Diagram Q'ty/unit MUZ-A09RV- E MUZ-ARV- E M 75K 97 TW E56 55 TW E57 60 TW E56 5 TW E45 M J 50 TW E9 90 T M 69A 66 M 69A 66 M 40L 45 TW E56 5 TW E M 68V 96 M 0A 5 TW E56 9 TW E56 0 M K89 96 TW E56 94 TW E57 94 TOP PANEL MOTOR SUPPORT OUTDOOR HEAT EXCHANGER GRILLE FRONT PANEL PROPELLER FAN BASE COMPRESSOR STOP VALVE (LIQUID) STOP VALVE (GAS) SERVICE PANEL BACK PANEL PIPE ASSEMBLY 4-WAY VALVE CONDENSER NET SEPARATOR OUTDOOR FAN MOTOR CAPILLARY TUBE MUFFLER MUFFLER SPECIAL MC MF6 When servicing, cut the tube to the proper length as shown in the REFRIGERANT SYSTEM DIAGRAM. See page Remarks SNB09FJAH {6.5 {9.5 EXP. VALVE, CAPILLARY RA6V8- PC/SET{.0 {