TECHNICAL & SERVICE MANUAL

Transcription

1 AIR CONDITIONERS 0 TECHNICAL & SERVICE MANUAL Models P0VMA(L)-E, P5VMA(L)-E, PVMA(L)-E, P40VMA(L)-E, P50VMA(L)-E, P6VMA(L)-E P7VMA(L)-E P80VMA(L)-E P00VMA(L)-E P5VMA(L)-E P40VMA(L)-E

2 Safety Precautions Read before installation and performing electrical work Thoroughly read the following safety precautions prior to installation. Observe these safety precautions for your safety. This equipment may have adverse effects on the equipment on the same power supply system. Contact the local power authority before connecting to the system. Symbol explanations WARNING This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death. CAUTION This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or damage to the unit. Indicates an action that must be avoided. Indicates important instructions. Indicates a parts that requires grounding. Indicates that caution must be taken with rotating parts. (This symbol is on the main unit label.) <Color: Yellow> Indicates that the parts that are marked with this symbol pose a risk of electric shock. (This symbol is on the main unit label.) <Color: Yellow> WARNING Carefully read the labels affixed to the main unit. WARNING Ask your dealer or a qualified technician to install the unit. Improper installation by the user may result in water leakage, electric shock, or fire. Properly install the unit on a surface that can withstand its weight. Unit installed on an unstable surface may fall and cause injury. Only use specified cables. Securely connect each cable so that the terminals do not carry the weight of the cable. Improperly connected cables may produce heat and start a fire. Take appropriate safety measures against wind gusts and earthquakes to prevent the unit from toppling over. Improper installation may cause the unit to topple over and cause injury or damage to the unit. Only use accessories (i.e., air cleaners, humidifiers, electric heaters) recommended by Mitsubishi Electric. Do not make any modifications or alterations to the unit. Consult your dealer for repair. Improper repair may result in water leakage, electric shock, or fire. Do not touch the heat exchanger fins with bare hands. The fins are sharp and pose a risk of cuts. In the event of a refrigerant leak, thoroughly ventilate the room. If gaseous refrigerant leaks out and comes in contact with an open flame, toxic gases will be generated. Properly install the unit according to the instructions in the Installation Manual. Improper installation may result in water leakage, electric shock, or fire. Have all electrical work performed by an authorized electrician according to the local regulations and the instructions in this manual. Use a dedicated circuit. Insufficient power supply capacity or improper installation of the unit may result in malfunctions of the unit, electric shock, or fire. HWE08B i

3 WARNING Keep electrical parts away from water. Wet electrical parts pose a risk of electric shock, smoke, or fire. Securely attach the control box cover. If the cover is not installed properly, dust or water may infiltrate and pose a risk of electric shock, smoke, or fire. Only use the type of refrigerant that is indicated on the unit when installing or relocating the unit. Infiltration of any other types of refrigerant or air into the unit may adversely affect the refrigerant cycle and may cause the pipes to burst or explode. When installing the unit in a small space, take appropriate precautions to prevent leaked refrigerant from reaching the limiting concentration. Leaked refrigerant gas will displace oxygen and may cause oxygen starvation. Consult your dealer before installing the unit. Consult your dealer or a qualified technician when moving or reinstalling the unit. Improper installation may result in water leakage, electric shock, or fire. After completing the service work, check for a refrigerant leak. If leaked refrigerant is exposed to a heat source, such as a fan heater, stove, or electric grill, toxic gases will be generated. Do not try to defeat the safety features of the unit. Forced operation of the pressure switch or the temperature switch by defeating the safety features for these devices, or the use of accessories other than the ones that are recommended by Mitsubishi Electric may result in smoke, fire, or explosion. Consult your dealer for proper disposal method. Do not use a leak detection additive. Precautions for handling units for use with R40A CAUTION Do not use the existing refrigerant piping. A large amount of chlorine that may be contained in the residual refrigerant and refrigerator oil in the existing piping may cause the refrigerator oil in the new unit to deteriorate. Use refrigerant piping materials made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and moisture. Contaminants in the refrigerant piping may cause the refrigerator oil to deteriorate. Store the piping materials indoors, and keep both ends of the pipes sealed until immediately before brazing. (Keep elbows and other joints wrapped in plastic.) Infiltration of dust, dirt, or water into the refrigerant system may cause the refrigerator oil to deteriorate or cause the compressor to malfunction. Use a small amount of ester oil, ether oil, or alkyl benzene to coat flares and flanges. Infiltration of a large amount of mineral oil may cause the refrigerator oil to deteriorate. Charge the system with refrigerant in the liquid phase. If gaseous refrigerant is drawn out of the cylinder first, the composition of the remaining refrigerant in the cylinder will change and become unsuitable for use. Only use R40A. The use of other types of refrigerant that contain chloride may cause the refrigerator oil to deteriorate. Use a vacuum pump with a check valve. If a vacuum pump that is not equipped with a check valve is used, the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerator oil to deteriorate. Prepare tools for exclusive use with R 40A. Do not use the following tools if they have been used with the conventional refrigerant: gauge manifold, charging hose, gas leak detector, check valve, refrigerant charge base, vacuum gauge, and refrigerant recovery equipment. If the refrigerant or the refrigerator oil that may be left on these tools are mixed in with R40A, it may cause the refrigerator oil in the new system to deteriorate. Infiltration of water may cause the refrigerator oil to deteriorate. Leak detectors for conventional refrigerants will not detect an R40A leak because R40A is free of chlorine. Do not use a charging cylinder. If a charging cylinder is used, the composition of the refrigerant in the cylinder will change and become unsuitable for use. Exercise special care when handling tools for use with R40A. Infiltration of dust, dirt, or water into the refrigerant system may cause the refrigerator oil to deteriorate. HWE08B ii

4 CONTENTS I Features [] Features... II Components and Functions [] Components and Functions... III Specfications [] Specifications... 4.Specfications... 4.Electrical component specifications... 7 IV Outlines and Dimensions [] Outlines and Dimensions... 8 [] Service Space... 0 V Wiring Diagram [] Wiring Diagram... VI Refrigerant System Diagram [] Refrigerant system diagram... VII Troubleshooting [] Troubleshooting... 4.Check methods... 4.DC fan motor (fan motor/indoor control board)... 8.Address switch setting Voltage test points on the control board Dipswitch setting (Factory setting)... VIII Disassembly Procedure [] Disassembly Procedure... 4.Control box... 4.Thermistor (Intake air)... 5.Drainpan Thermistor (Gas pipe) (Liquid pipe) Fan and fan motor Heat exchanger... 9 HWE08B

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6 [ I Features ] I Features [] Features Model Cooling capacity/heating capacity kw P0VMA(L)-E./.5 P5VMA(L)-E.8/. PVMA(L)-E.6/4.0 P40VMA(L)-E 4.5/5.0 P50VMA(L)-E 5.6/6. P6VMA(L)-E 7./8.0 P7VMA(L)-E 8.0/9.0 P80VMA(L)-E 9.0/0.0 P00VMA(L)-E./.5 P5VMA(L)-E 4.0/6.0 P40VMA(L)-E 6.0/8.0 HWE08B - -

7 [ II Components and Functions ] II Components and Functions [] Components and Functions. Indoor (Main) Unit () In case of rear inlet () In case of bottom inlet Air inlet Air inlet Air outlet Air outlet. Remote Controller [PAR-MAA] Once the operation mode is selected, the unit will remain in the selected mode until changed. () Remote Controller Buttons [Set Temperature] Button 7 [Vane Control] Button [Timer Menu] Button 8 [Ventilation] Button [Monitor/Set] Button [Operation] Button [Mode] Button 9 [Check/Clear] Button [Back] Button 0 [Test Run] Button 4 [Timer On/Off] Button [Filter] Button [Set Day] Button [ ] Button 5 [Louver] Button [ON/OFF] Button [Operation] Button Position of built-in room thermistor 6 [Fan Speed] Button 4 [Set Time] Button Keep the remote controller out of direct sunlight to ensure accurate measurement of room temperature. The thermistor at the lower right-hand section of the remote controller must be free from obstructions to ensure accurate measurement of room temperature. HWE08B - -

8 [ II Components and Functions ] () Remote Controller Display A Current time/timer time I Louver swing B Centralized control indicator J Ventilation C Timer OFF indicator K Filter sign D Timer mode indicator L Sensor position E Operation mode display: COOL, DRY, AUTO, FAN, HEAT M Room temperature F Function mode indicator N Vane setting G Preset temperature O Fan speed H Power indicator P Operation lamp HWE08B - -

9 [ III Specfications ] III Specfications [] Specifications. Specfications Model P0VMA(L)-E P5VMA(L)-E PVMA(L)-E P40VMA(L)-E Power supply Voltage V -phase Frequency Hz 50/60 Cooling capacity * kw Heating capacity * kw Power consumption * Cooling kw 0.06(0.04) 0.07(0.05) 0.09(0.07) Heating kw 0.04(0.04) 0.05(0.05) 0.07(0.07) Current consumption * Cooling A 0.5(0.4) 0.55(0.44) 0.64(0.5) Heating A 0.4(0.4) 0.44(0.44) 0.5(0.5) External finish Galvanized Dimensions Height mm 50 Width mm Depth mm 7 Net weight * kg () 6(5) Heat exchanger Cross fin(aluminium fin and copper tube) Fan Type Sirocco fan x Airflow rate (Low-Mid-High) External static pressure m /min Pa 5/50/70/00/50 Motor Output kw Air filter PP Honeycomb fabric (washable) Refrigerant pipe dimensions Gas (Brazed connection) mm[in.] ø.7[ø/] Liquid (Brazed connection) mm[in.] ø6.5[ø/4] Drain pipe dimensions mm[in.] O.D. [-/4] Operating noise(low-mid-high) 5Pa db (A) m Aux. duct.5m Measurement location m 50Pa Pa Pa Pa * Measured in anechoic room. Aux. duct 5Pa Pa m m 70Pa m 00Pa Measurement location * Measured in anechoic room. 50Pa * <Cooling> Indoor temperature: 7 CDB/9 CWB (8 FDB/66 FWB) Outdoor temperature: 5 CDB (95 FDB) <Heating> Indoor temperature: 0 CDB (68 FWB) Outdoor temperature: 7 CDB/6 CWB (45 FDB/4 FWB) * Figures in the parentheses indicate drainpump-less Model (L). HWE08B - 4 -

10 [ III Specfications ] Model P50VMA(L)-E P6VMA(L)-E P7VMA(L)-E P80VMA(L)-E Power supply Voltage V -phase Frequency Hz 50/60 Cooling capacity * kw Heating capacity * kw Power consumption * Cooling kw 0.(0.09) 0.(0.0) 0.4(0.) Heating kw 0.09(0.09) 0.0(0.0) 0.(0.) Current consumption * Cooling A 0.74(0.6).0(0.90).5(.04) Heating A 0.6(0.6) 0.90(0.90).04(.04) External finish Galvanized Dimensions Height mm 50 Width mm Depth mm 7 Net weight * kg 6(5) () Heat exchanger Cross fin(aluminium fin and copper tube) Fan Type Sirocco fan x Sirocco fan x Airflow rate (Low-Mid-High) m /min External static pressure Pa 5/50/70/00/50 Motor Output kw Air filter Refrigerant pipe dimensions Gas (Brazed connection) Liquid (Brazed connection) PP Honeycomb fabric (washable) mm[in.] ø.7[ø/] ø5.88[ø5/8] mm[in.] ø6.5[ø/4] ø9.5[ø/8] Drain pipe dimensions mm[in.] O.D. [-/4] Operating noise(low-mid-high) 5Pa db (A) Aux. duct 50Pa Pa m.5m m 00Pa Measurement location 50Pa * Measured in anechoic room. Aux. duct 5Pa Pa m m 70Pa m 00Pa Measurement location * Measured in anechoic room. 50Pa * <Cooling> Indoor temperature: 7 CDB/9 CWB (8 FDB/66 FWB) Outdoor temperature: 5 CDB (95 FDB) <Heating> Indoor temperature: 0 CDB (68 FWB) Outdoor temperature: 7 CDB/6 CWB (45 FDB/4 FWB) * Figures in the parentheses indicate drainpump-less Model (L). HWE08B - 5 -

11 [ III Specfications ] Model P00VMA(L)-E P5VMA(L)-E P40VMA(L)-E Power supply Voltage V -phase Frequency Hz 50/60 Cooling capacity * kw Heating capacity * kw Power consumption * Cooling kw 0.4(0.) 0.4(0.) 0.6(0.4) Heating kw 0.(0.) 0.(0.) 0.4(0.4) Current consumption * Cooling A.47(.6).05(.94).(.0) Heating A.6(.6).94(.94).0(.0) External finish Galvanized Dimensions Height mm 50 Width mm Depth mm 7 Net weight * kg 4(4) 46(45) Heat exchanger Cross fin(aluminium fin and copper tube) Fan Type Sirocco fan x Airflow rate (Low-Mid-High) External static pressure m /min Pa 5/50/70/00/50 Motor Output kw 0.44 Air filter PP Honeycomb fabric (washable) Refrigerant pipe dimensions Gas (Brazed connection) mm[in.] ø5.88[ø5/8] Liquid (Brazed connection) mm[in.] ø9.5[ø/8] Drain pipe dimensions mm[in.] O.D. [-/4] Operating noise(low-mid-high) 5Pa db (A) Aux. duct 50Pa Pa m.5m m 00Pa Measurement location 50Pa * Measured in anechoic room. Aux. duct 5Pa Pa m m 70Pa m 00Pa Measurement location * Measured in anechoic room. 50Pa * <Cooling> Indoor temperature: 7 CDB/9 CWB (8 FDB/66 FWB) Outdoor temperature: 5 CDB (95 FDB) <Heating> Indoor temperature: 0 CDB (68 FWB) Outdoor temperature: 7 CDB/6 CWB (45 FDB/4 FWB) * Figures in the parentheses indicate drainpump-less Model (L). HWE08B - 6 -

12 [ III Specfications ]. Electrical component specifications Component Symbol P0VMA(L)-E P5VMA(L)-E PVMA(L)-E Room temperature TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ thermistor Liquid pipe thermistor TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Gas pipe thermistor TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Fuse FUSE 50V 6.A Fan motor 8-pole, Output 85W SIC-70CW-D885- Linear expansion valve LEV VDC Stepping motor drive port diameter ø. (0~000 pulse) Power supply terminal block Transmission terminal block TB TB5 TB5 (L, N, ) 50V 0A (, ) 50V 5A, (M, M, S) 50V 0A Drain float switch DS Open/short detection Initial contact resistance 500 mω or less Component Symbol P40VMA(L)-E P50VMA(L)-E P6VMA(L)-E P7VMA(L)-E P80VMA(L)-E Room temperature TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ thermistor Liquid pipe thermistor TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Gas pipe thermistor TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Fuse FUSE 50V 6.A Fan motor 8-pole, Output 85W SIC-70CW-D885-8-pole, Output W SIC-70CW-D8- Linear expansion valve LEV VDC Stepping motor drive port diameter ø. (0~000 pulse) Power supply terminal block Transmission terminal block TB (L, N, ) 50V 0A TB5 TB5 (, ) 50V 5A, (M, M, S) 50V 0A Drain float switch DS Open/short detection Initial contact resistance 500 mω or less Component Symbol P00VMA(L)-E P5VMA(L)-E P40VMA(L)-E Room temperature TH thermistor Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Liquid pipe thermistor TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Gas pipe thermistor TH Resistance 0 C/5kΩ, 0 C/9.6kΩ, 0 C/6.kΩ, 5 C/5.4kΩ, 0 C/4.kΩ, 40 C/.0kΩ Fuse FUSE 50V 6.A Fan motor 8-pole, Output 44W SIC-0CW-D844- Linear expansion valve LEV VDC Stepping motor drive port diameter ø. (0~000 pulse) Power supply terminal block Transmission terminal block TB TB5 TB5 (L, N, ) 50V 0A (, ) 50V 5A, (M, M, S) 50V 0A Drain float switch DS Open/short detection Initial contact resistance 500 mω or less HWE08B - 7 -

13 [ IV Outlines and Dimensions ] IV Outlines and Dimensions [] Outlines and Dimensions. P0, 5,, 40, 50, 6, 7, 80, 00, 5, 40VMA-E Less than 700mm Model A B C D P0,5,VMA-E P40, 50VMA-E P6,7,80VMA-E P00,5VMA-E P40VMA-E E 7 F G H J K L 00 M N P Air Filter Gas pipe Liquid pipe ø.7 ø6.5 ø5.88 ø (Actual length) Less than 00mm Drain hose (I.D.ø) <accessory> A B (Suspension bolt pitch) C G K x (M - ) = N L Air inlet 40 0 D (Duct) 0 00 x (E - ) = F 00 P - ø.9 6 J K x E - ø.9 Suspension bolt hole 4-4 x 0 Slot Air outlet (Suspension bolt pitch) (Duct) Refrigerant piping Brazing connection (liquid) Drain pipe (O.D.ø) x - ø.9 Refrigerant piping Brazing connection (gas) Control box Drain pump Terminal block (Transmission) Drain pipe (O.D.ø) (Spontaneous draining) Terminal block (Power source) 0 K J P - ø.9 6 J K K x (M - ) = N L K J Note Use M0 suspension bolts. (not supplied) Provide an access door for maintenance at the bottom. The dimensions in the table are those of the P6, 7, 80, 00, 5, 40VMA-E models, which have fans. The P0~50VMA-E model have fans. 4 To connect an intake duct, uninstall the air filter on the unit, and install a locally procured air filter on the intake duct on the intake side. HWE08B - 8 -

14 [ IV Outlines and Dimensions ]. P0, 5,, 40, 50, 6, 7, 80, 00, 5, 40VMAL-E Model A B C D P0,5,VMAL-E P40, 50VMAL-E P6,7,80VMAL-E P00,5VMAL-E P40VMAL-E E 7 F G H J K L 00 M N P Gas pipe Liquid pipe ø.7 ø6.5 ø5.88 ø P - ø.9 64 (Suspension bolt pitch) Refrigerant piping Brazing connection (liquid) (Duct) 00 7 x - ø.9 Refrigerant piping Brazing connection (gas) Drain pipe (O.D.ø) 8 0 Air Filter Control box Terminal block (Transmission) Terminal block (Power source) 0-0 (Actual length) D (Duct) 00 x (E - ) = F 6 J A B (Suspension bolt pitch) C G x E - ø.9 Suspension bolt hole 4-4 x 0 Slot Air outlet Air inlet Drain hose (I.D.ø) <accessory> 4 0 K x (M - ) = N K L K J K K x (M - ) = N L K J J P - ø.9 Note Use M0 suspension bolts. (not supplied) Provide an access door for maintenance at the bottom. The dimensions in the table are those of the P6, 7, 80, 00, 5, 40VMAL-E models, which have fans. The P0~50VMAL-E model have fans. 4 To connect an intake duct, uninstall the air filter on the unit, and install a locally procured air filter on the intake duct on the intake side. HWE08B - 9 -

15 Min. 00 mm Min. 00 mm [ IV Outlines and Dimensions ] [] Service Space.P0, 5,, 40, 50, 6, 7, 80, 00, 5, 40VMA(L)-E Secure enough access space to allow for the maintenance, inspection, and replacement of the motor, fan, drain pump, heat exchanger, and electric box in one of the following ways. Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects. () When a space of 00 mm or more is available below the unit between the unit and the ceiling (Fig. ) Create access door and ( mm each) as shown in Fig.. (Access door is not required if enough space is available below the unit for a maintenance worker to work in.) () When a space of less than 00 mm is available below the unit between the unit and the ceiling (At least 0 mm of space should be left below the unit as shown in Fig..) Create access door diagonally below the electric box and access door below the unit as shown in Fig. 4. or Create access door 4 below the electric box and the unit as shown in Fig. 5. Electric box Min. 00 mm Min. 0 mm Supply air Intake air Ceiling beam Access door ( ) Viewed from the direction of the arrow A Ceiling Electric box Min. 0 mm Min.0 mm Ceiling beam Supply air Intake air Access door Viewed from the direction of the arrow B Ceiling R Access door ( ) Access door ( ) Electric box Bottom of indoor unit 00~00 Q 50~ (Viewed from the direction of the arrow A) Maintenance access space 50 S Q 450 T 50 Q Fig. Fig. Unit: mm Fig Min. 00 mm Access door ( ) Electric box 00~00 Bottom of indoor unit Access door 777 (Viewed from the direction of the arrow B) Maintenance access space Fig. 4 Model P0,5,VMA(L)-E P40,50VMA(L)-E P6,7,80VMA(L)-E P00,5VMA(L)-E P40VMA(L)-E Electric box Bottom of indoor unit Access door (Viewed from the direction of the arrow B) Fig. 5 Q R 50~50 50~50 50~50 400~ ~600 S (mm) T Maintenance access space HWE08B - 0 -

16 [ V Wiring Diagram ] V Wiring Diagram [] Wiring Diagram. P0, 5,, 40, 50, 6, 7, 80, 00, 5, 40VMA(L)-E M LEV SW5 SWC SWA SW4 SW4 SW SW CN CN t t TH (Red) CN7 LED LED SW SW (Blue) CNA OFF SW SWE ON CN90 CN44 CN4F (Red) CN0 (Green) CN5 CN5 CNXB CN CN4F 4 t A TH TH FS FOR P VMA-E REFER TO "A" FOR P VMAL-E (Red) CN05 CNA (Black) (Blue) CNM CNXC I.B. (Blue) CNXA 4 M ~ Drainpump INSIDE SECTION OF CONTROL BOX TB5 S (SHIELD) ACL M M TB5 5 (Red) CND P.B. TB L N DSA F0 U ZNR0 ZNR0 U (Blue) CNP X0 (Blue) X0 DC80-40V Rectifier circuit CNXB CNXC CNXA CNMF ONLY FOR P VMA-E MS ~ Fan motor TO MA REMOTE CONTROLLER TO OUTDOOR UNIT BC CONTROLLER REMOTE CONTROLLER TO NEXT INDOOR UNIT PULL BOX FUSE (6A) BREAKER (6A) POWER SUPPLY AC0-40V 50,60Hz HWE08B - -

17 [ V Wiring Diagram ] Table. SYMBOL EXPLANATION SYM- BOL NAME SYM- BOL NAME SYM- BOL I.B. Indoor controller board CN Connector (Remote switch) SW (I.B.) P.B. Power supply board CN4 Connector (HA terminal-a) SW (I.B.) TB Power source terminal block CN5 Connector (Centrally control) SW4 (I.B.) TB5 Transmission terminal block CN5 Connector (Remote indication) SW5 (I.B.) TB5 Transmission terminal block CN90 Connector (Wireless) SWE (I.B.) F0 Fuse AC 50V 6.A CN05 Connector (IT terminal) SW (I.B.) ZNR0, 0 Varistor CNA Connector (0-0V Analog input) SW (I.B.) DSA Arrester FS Float switch SW4 (I.B.) X0 Aux. relay TH Thermistor (inlet air temp.detection) X0 Aux. relay TH Thermistor (piping temp.detection / liguid) ACL AC reactor (Power factor improvement) TH CN7 Connector (Damper) SW (I.B.) Thermistor (piping temp. detection / gas) Switch (for mode selection) SWA (I.B.) SWC (I.B.) NAME Switch (for capacity code) Switch (for mode selection) Switch (for model selection) Switch (for mode selection) Connector (emergency operation) Switch (s digit address set) Switch (0ths digit address set) Switch (BRANCH No.) Switch (for static pressure selection) Switch (for static pressure selection) Note Wiring to TB, TB5, and TB5 indicated by the double-dashed lines is on-site work. terminal block, connector. HWE08B - -

18 [ VI Refrigerant System Diagram ] VI Refrigerant System Diagram [] Refrigerant system diagram (A) (G) (B) (D) (I) (H) (E) (F) (E) (C) (A) (B) (C) (D) (E) (F) (G) (H) (I) Gas pipe thermistor TH Gas pipe Liquid pipe Brazed connections Strainer (#00 mesh) Linear expansion valve Liquid pipe thermistor TH Heat exchanger Room temperature thermistor TH Capacity P0, 5,, 40, 50VMA(L)-E P6, 7, 80, 00, 5, 40VMA(L)-E Gas pipe ø.7 [/] ø5.88 [5/8] Liquid pipe ø6.5 [/4] ø9.5 [/8] HWE08B - -

19 [ VII Troubleshooting ] VII Troubleshooting [] Troubleshooting. Check methods. Component and check points () Thermistor Room temperature thermistor (TH) Liquid pipe thermistor (TH) Gas pipe thermistor (TH) Disconnect the connector and measure the resistance between terminals with a tester. (Ambient temperature 0 C - 0 C) Normal 4.kΩ - 9.6kΩ ) Thermistor characteristic graph Abnormal Open or short (Refer to the thermistor characteristic graph below.) Low-temperature thermistor Room temperature thermistor (TH) Liquid pipe thermistor (TH) Gas pipe thermistor (TH) Drain sensor (DS) Thermistor R 0 = 5 kω % Multiplier of B = 480 kω % Rt = 5 exp { 480( ) } 7+t 7 0 C 5kΩ 0 C 9.6kΩ 0 C 6.kΩ 5 C 5.kΩ 0 C 4.kΩ 40 C.0kΩ (A) Temperature ( C) (B) Resistance (kω) (B) (A) () Fan motor (CNMF) Refer to the page on "DC fan motor (fan motor/indoor control board)." () Linear expansion valve Disconnect the connector, and measure the resistance between terminals with a tester. Refer to the next page for details. M LEV (F) CN60 (E) (D) (C) 4 (B) 5 (A) 6 Normal Abnormal Open or short White-Red Yellow-Brown Orange-Red Blue-Brown 00 kω 0% (A) Brown (D) Orange (B) Red (E) Yellow (C) Blue (F) White HWE08B - 4 -

20 [ VII Troubleshooting ] ) Summary of linear expansion valve (LEV) operation The LEV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The LEV position changes in response to the pulse signal. Indoor control board and LEV connection (G) VDC (J) (A) 6 4 (C) (B) 5 (I) (F) M 5 (B) (D) 6 (A) (E) (C) (D) (E) (F) 4 (H) (A) Brown (F) White (B) Red (G) Control board (C) Blue (H) Connection (CN60) (D) Orange (I) Drive circuit (E) Yellow (J) Linear expansion valve Pulse signal output and valve operation Phase Output pulse number 4 ø ON OFF OFF ON ø ON ON OFF OFF ø OFF ON ON OFF ø4 OFF OFF ON ON The output pulse changes in the following order: When the valve closes -> -> -> 4 -> When the valve opens 4 -> -> -> -> 4 When the valve position remains the same, all output signals will be OFF. If any output signal is missing or if the signal remains ON, the motor vibrates and makes clicking noise. HWE08B - 5 -

21 [ VII Troubleshooting ] ) LEV operation (a) (a) (b) (c) (d) (e) Close Open Fully open valve (000 pulses) No. of pulses Extra tightning (80-00 pulse) (f) (f) Valve opening degree (b) (c) (d) (e) When the power is turned on, a pulse signal of 00 pulses is output (valve closure signal), to bring the valve to position A. When the valve is operating normally, it is free of vibration noise. If the valve locks or when it goes from point E to A in the figure, it makes louder noise than would be heard when there is an open phase. Check for abnormal sound/vibration by placing the metal tip of a screwdriver against the valve and the handle side against your ear. ) Troubleshooting Symptom Checking Criteria Remedy Circuit failure on the microcomputer Locked LEV Disconnected or shorted LEV motor coils Disconnect the connectors on the control board, and connect LEDs to test the circuit as shown below. k LED Pulse signals are output for 0 seconds when the main power is turned on. If there are LEDs that do not light up at all or remain lit after the pulses are turned off, there is a problem with the driving circuit. The motor will idle and make small clicking noise if it is run while the LEV is locked. If this clicking noise is heard both when the valve is fully closed and while it is being opened, it indicates a problem. easure the resistance between the coils with a tester (red-white, red-orange, brown-yellow, brown-blue). The normal range of resistance is 50 Ω 0% Replace the indoor control board if driving circuit failure is detected. Replace the LEV. Replace the LEV. HWE08B - 6 -

22 [ VII Troubleshooting ] Symptom Checking Criteria Remedy Valve closure failure (leaky valve) To check the LEV on the indoor unit, check the indoor unit liquid pipe temperature that appears on the operation monitor on the outdoor unit's multi control board while operating the indoor unit in question in the FAN mode and the other indoor units in the cooling mode. (A) Termistor (TH) Replace the LEV if the amount of leakage is great. (A) LEV Misconnections of connectors or contact failure Normally, the LEV is fully closed while the unit is in the FAN mode. If the valve is leaky, liquid pipe thermistor reading will be lower than normal. If it is significantly lower than the inlet temperature on the remote controller, valve closure failure is suspected. If the amount of leakage is insignificant, replacement of LEV is unnecessary unless it is causing a problem. Perform a visual check for disconnected connectors. Perform a visual check of lead wire color. Disconnect the connectors on the control board and perform a continuity test. (4) Drain-up mechanism Measure the resistance between the terminals with a tester. (coil temperature 0 C) Normal Abnormal 40 Ω Open or short (5) Drain float switch (CN4F) Disconnect the connector, and measure the resistance between terminals with a tester. (A) Moving part (A) 4 (B) (C) (A) (B) (C) Switch Magnet Position of the moving part Normal Abnormal Up Short (any position but short) Down Open (any position but open) HWE08B - 7 -

23 [ VII Troubleshooting ]. DC fan motor (fan motor/indoor control board). CAUTION A high voltage is applied to the connector for connection to the fan motor (CNMF). Do not unplug the connector CNMF with the unit energized to avoid damage to the indoor control board and fan motor.. Troubleshooting Symptom: Indoor unit fan does not run. Check fan motor connector contact (CNMF). Is the fan motor connector (CNMF) fully inserted? No Fix the connection. Yes Check the power supply. Measure the voltage at the indoor control board. 0-40VDC (same with the voltage between fan connector (+) and 4(-)) Power supply voltage VDC 5VDC (same with the voltage between fan connector 5 (+) and 4(-)) - 6.5VDC (same with the voltage between fan connector 6 (+) and 4(-)) [Values for Vsp are the values that are measured with the fan motor in operation. Vsp is 0V when the fan motor is stopped.] Is the voltage within the normal range? No Replace the indoor control board. Yes Check the fan motor position thermistor signal. Get the motor to make a full rotation or more, and measure the voltage at the test point VFG. (same with the voltage between fan connector 7 (+) and 4(-)) Are 0VDC and 5VDC displayed alternately? No Replace the motor. Yes Replace the indoor control board. HWE08B - 8 -

24 [ VII Troubleshooting ]. Address switch setting Make sure that power to the unit is turned off. (A) (B) ON OFF SW4 Please see the WIRING LABEL on the control box. (A) (B) Indoor unit control board Factory setting. When using an ME remote controller, set the address with the rotary switches (SW, SW). Address setting is not required when the unit remote controller is used. On-site address setting is required for the indoor units to run.. Address settings vary in different systems. Refer to the section on address setting in the outdoor unit installation manual.. Address is set with a combination of SW (0's digit) and SW ('s digit). To set the address to "," set SW to "0" and SW to "." To set the address to "5," set SW to "" and SW to "5." HWE08B - 9 -

25 [ VII Troubleshooting ] 4. Voltage test points on the control board. P0, 5,, 40, 50, 6, 7, 80, 00, 5, 40VMA(L)-E F0 Fuse(AC 50V 6.A) CNM CND Power supply voltage (0-40VAC) CNM For M-NET transmission cable connection (4-0VDC) SWE Emergency operation CNA CN4 CN5 CN5 SW SW4 SW Capacity setting Function setting Function setting SW SW4 CN0 CN4F CN44 SWE CN CNA CN5 CN5 CN4 Remote start/stop adapter For MA remote controller cable connection (0 - VDC (Between and.)) Remote display Centralized control JAMA standard HA terminal A CN44 Thermistor (liquid/gas temperature) SW CN Indoor controller board CN4F CN0 Float thermistor Thermistor (Inlet temperature) CND F0 CNMF Fan motor output - 4: 0-40 VDC 5-4: 5 VDC 6-4: VDC 7-4: Stop 0 or 5 VDC Run 7.5 VDC (0-5 pulse) CNP Drain-up mechanism output (00VAC) (*) V FG Voltage on the (-) side of PC5 and C5 (Same with the voltage between 7 (+) and 4 (-) of CNMF) CNP C5(*) V CC Vsp Voltage between the C5 pins 5 VDC (Same with the voltage between 5 (+) and 4 (-) of CNMF) Voltage between the C5 pins 0VDC (with the fan stopped) - 6.5VDC (with the fan in operation) (Same with the voltage between 6 (+) and 4 (-) of CNMF) CNMF PC5(*) C5(*) Power supply board HWE08B - 0 -

26 [ VII Troubleshooting ] 5. Dipswitch setting (Factory setting). Function setting () SW Switch position Function Switch setting ON OFF Active Thermistor (Intake air thermistor) Built-in thermistor on the remote controller Indoor unit Filter clogging detection Available Unavailable Filter life 500 hr 00 hr 4 Outdoor air intake Enabled Disabled 5 Remote display Thermo-ON signal Fan output 6 Humidifier operation During heating mode During heating operation 7 Fan speed Low Very low 8 Fan speed at heating Thermo-OFF Preset fan speed Follows the setting of SW-7 9 Auto restart after power failure Enabled Disabled 0 Power start/stop Enabled Disabled ) Adress board Factory setting () SW Switch position Function Switch setting ON OFF Unit type Cooling only Heat pump Heating 4-deg up Disabled Enabled ) Indoor control board Dipswitch settings must be made while the unit is stopped. Factory setting P0VMA(L)-E P5, 40, 6, 7, 80, 00, 5, 40VMA(L)-E P, 50VMA(L)-E HWE08B - -

27 [ VII Troubleshooting ]. Capacity code setting () SW ) Indoor control board Dipswitch settings must be made while the unit is stopped. Factory setting The switches are set to correspond to the unit capacity. P0VMA(L)-E P5VMA(L)-E PVMA(L)-E P40VMA(L)-E P50VMA(L)-E P6VMA(L)-E P7VMA(L)-E P80VMA(L)-E P00VMA(L)-E P5VMA(L)-E P40VMA(L)-E. Model setting () SW4 ) Indoor control board Dipswitch settings must be made while the unit is stopped. Factory setting Please see the WIRING LABEL on the control box. Note: Changes made to the dipswitches SW, SW, and SW will become effective when the unit comes to a stop (remote controller off). There is no need to power cycle the unit. 4. Power voltage setting () SW5 ) Indoor control board Dipswitch settings must be operated with the main power turned OFF. Factory setting Please see the WIRING LABEL on the control box. Set SW5 to 40V side when the power supply is 40 volts. When the power supply is 0 and 0 volts, set SW5 to 0V side. HWE08B - -

28 [ VII Troubleshooting ] 5. External static pressure () SWA, SWC ) Indoor control board All models SWA 5Pa SWC SWA 50Pa SWC SWA 70Pa SWC SWA 00Pa SWC SWA 50Pa SWC Factory setting SWA SWC Note: Changes that are made to the dipswitches SWA and SWC immediately become effective regardless of the unit's operation status (RUN/STOP) or the remote controller status (ON/OFF). 6. s and 0ths digits () SW, SW (Rotary switch) The use of a network remote controller (PAR-F7MEA) requires address setting. ) Indoor control board Address settings must be made while the unit is stopped. Factory setting 7. Connection No. setting () SW4 (Rotary switch) This switch is used when the unit connected to an R series of outdoor unit. ) Indoor control board Factory setting Note: Changes to the dipswitches SW, SW, SW4, and SW5 must be made while the unit is stopped and the remote controller is OFF. HWE08B - -

29 [ VIII Disassembly Procedure ] VIII Disassembly Procedure [] Disassembly Procedure. Control box Exercise caution when removing heavy parts.. Removing the control box cover () Remove the three fixing screws on the cover (A) to remove it. Fig. (A) Fig. HWE08B - 4 -

30 [ VIII Disassembly Procedure ]. Thermistor (Intake air) Exercise caution when removing heavy parts.. Remove the control box cover according to the procedure in section [].. Remove the thermistor. () Pull out the thermistor holder (B) and thermistor (C) on the control box. (B), (C) Fig. HWE08B - 5 -

31 [ VIII Disassembly Procedure ]. Drainpan Exercise caution when removing heavy parts.. Removing the filter and the bottom plate () Push down the tab on the filter, and pull out the filter in the direction of the arrow. () Remove the fixing screws on the bottom plate (D), (E) to remove it. (D) (E) Fig.4. Removing the drainpan () Pull out the drain pan in the direction of the arrow. Fig.5 Note Drain the water out of the drain pan before removing it. HWE08B - 6 -

32 [ VIII Disassembly Procedure ] 4. Thermistor (Gas pipe) (Liquid pipe) Exercise caution when removing heavy parts.. Remove the drain pan according to the procedure in section [].. Removing the Heat exchanger cover () Remove the four fixing screws on the heat exchanger cover (F) to remove it. HEX (F) Fig.6. Removing the thermistor () Remove the thermistor (G) from the thermistor holder (H) on the copper tube. Thermistor size Liquid pipe: ø8mm Gas pipe: ø6mm (G), (H) Fig.7 HWE08B - 7 -

33 [ VIII Disassembly Procedure ] 5. Fan and fan motor Exercise caution when removing heavy parts.. Removing the filter and the bottom plate () Push down the tab on the filter, and pull out the filter in the direction of the arrow. () Remove the fixing screws on the bottom plate (J) to remove it. (J) Fig.8 (a) Tab. Removing the fan casing (bottom half) () Squeeze the tabs on the fan casing to remove it in the direction of arrow. (a) Fig.9. Removing the motor cable () Remove the motor cable threw the rubber bush. 4. Removing the fan motor and the Sirocco fan () Remove the two motor fixing screws to remove the motor and the Sirocco fan in the direction of arrow. Fig.0 () Remove the four fan case fixing screws to take the top half of the fan casing off. Fig. HWE08B - 8 -

34 [ VIII Disassembly Procedure ] 6. Heat exchanger Exercise caution when removing heavy parts.. Remove the drain pan according to the procedure in section [].. Remove the heat exchanger cover according to the procedure in section [4].. Removing the cover () Remove the five fixing screws on the cover (K) to remove it. (K) Fig. (K) Pipe support plate 4. Removing the Heat exchanger () Remove the fixing screws on the heat exchanger (M) to remove it. (M) Fig. HWE08B - 9 -

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36 HWE08B New publication effective Sep. 0 Specifications subject to change without notice