Mitsubishi Electric SUZ-KA25VA Service Manual Download Page 88

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a How to check inverter/compressor

Are the voltages balanced?

Disconnect the connector (CN61) between
compressor and the intelligent power module
(IPM).

Replace the inverter P.C. board.

Check the voltage between terminals.

Check the compressor.

See

“Check of compressor”.

Yes

See

“Check of open phase”.

With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if

the inverter is normal by measuring the balance of voltage between the terminals.

The output voltage values have the tolerance of ± 20%.

<< Operation method>>
Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit. (TEST RUN OPERATION

: Refer to page 31 for SLZ/SUZ and page 37 for SEZ/SUZ.)

<<Measurement point>>
  At 3 points
  BLK (U) - WHT (V)
  BLK (U) - RED (W)
  WHT (V) - RED (W)

NOTE

: 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of the inverter P.C. board fl ashes 9 times. (Refer to 12-6-3. (KA25/35VA) or 12-6-7.)

Refer to

“Check of compressor operation

time”.
Does the compressor operate continuously?

Check the refrigerant circuit.

OK.

Yes

Refer to

“Check of compressor winding”.

Is the compressor normal?

Replace the compressor.

Yes

d Check of compressor

b Check of open phase

[SUZ-KA25/35VA(H)R1.TH SUZ-KA50VAR2.TH]

9-time flash

2.5-second OFF

Is the compressor
operation time more than
10 seconds?

Replace the compressor.

Yes

Summary of Contents for SUZ-KA25VA

Page 1: ...ON 8 5 NOISE CRITERIA CURVES 12 6 OUTLINES AND DIMENSIONS 13 7 WIRING DIAGRAM 15 8 REFRIGERANT SYSTEM DIAGRAM 23 9 PERFORMANCE CURVES 29 10 ACTUATOR CONTROL 57 11 SERVICE FUNCTIONS 58 12 TROUBLESHOOTING 58 13 DISASSEMBLY INSTRUCTIONS 103 14 PARTS LIST 113 15 RoHS PARTS LIST 119 Indication of model name NOTE This service manual describes technical data of the outdoor units RoHS compliant products h...

Page 2: ...A25VA E1 MFZ KA35VA E1 MFZ KA50VA E1 OC320 OC321 OB409 Indoor unit Service Manual No Service Ref Heat pump without electric heater KA25VA H TH KA25VA H R1 TH KA60VA 1 TH KA60VAR2 TH KA71VA 1 TH KA50VA 1 TH KA50VAR2 TH HWE0711 KA35VA H TH KA35VA H R1 TH NOTE Please refer to the service manual of indoor unit or the technical data book for the combination data Only MFZ KA VA series can be connected t...

Page 3: ... been deleted Muffler of gas pipe side has been changed Capillary tube of liquid pipe side has been added SUZ KA35VA H R1 TH 4 way valve and R V coil have been changed Specification of LEV body has been changed Stop valve has been changed 3 Precharged refrigerant amount has been changed 900g 800g SUZ KA25VA H R1 TH 4 Fan motor has been changed RC0J50 AL RC0J50 DB 5 Outdoor heat exchanger temperatu...

Page 4: ... been changed 4 Noise filter P C board has been changed 5 Length of fan motor lead wire has been changed 6 Shape of relay panel has been changed 7 Symbol on terminal block has been changed to S1 S2 S3 8 Control method between indoor and outdoor unit has been changed INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT This room air conditioner adopts an HFC refrigerant R410A which never dest...

Page 5: ...rque wrench Flare tool Flare gauge Vacuum pump adapter Electronic scale for refrigerant charging No Not substitutable for R410A Yes Substitutable for R410A No 12 7 mm and 15 88 mm 1 Tools dedicated for the air conditioner with R410A refrigerant The following tools are required for R410A refrigerant Some R22 tools can be substituted for R410A tools The diameter of the service port on the stop valve...

Page 6: ... 4 Air purge Do not discharge the refrigerant into the atmosphere Take care not to discharge refrigerant into the atmosphere during installation reinstallation or repairs to the refrigerant circuit Use the vacuum pump for air purging for the purpose of environmental protection 5 Additional charge For additional charging charge the refrigerant from liquid phase of the gas cylinder If the refrigeran...

Page 7: ...VA TH SUZ KA25VAH TH SUZ KA35VAH TH OUTDOOR UNIT Air inlet Piping Air outlet back and side Drain hose Drain outlet ACCESSORIES Drain socket Drain cap 33 1 2 SUZ KA50VA 1 TH SUZ KA60VA 1 TH SUZ KA71VA 1 TH SUZ KA50VAR2 TH SUZ KA60VAR2 TH SUZ KA50VA TH SUZ KA50VA1 TH SUZ KA50VAR2 TH SUZ KA60VA TH SUZ KA60VA1 TH SUZ KA60VAR2 TH SUZ KA71VA TH SUZ KA71VA1 TH SUZ KA25VAR1 TH SUZ KA35VAR1 TH SUZ KA25VAHR...

Page 8: ...0 NEO22 Cooling 2 74 0 31 2 058 Heating 3 37 0 28 1 938 SUZ KA50VA TH SUZ KA50VA1 TH Single phase 230V 50Hz 6 75 0 30 SNB130FLDHorSNB130FLDH1 850 U V 0 45 U W 0 45 V W 0 45 RC0J60 AA WHT BLK 15 2 BLK RED 15 2 RED WHT 15 2 840 850 330 53 2 1 60 FLDH 450 FLDH1 600 NEO22 Cooling 6 45 2 940 1 650 53 51 800 480 Heating 6 05 2 940 2 210 55 53 800 620 Capa city SUZ KA35VA H R1 TH 840 760 2 880 800 630 3 ...

Page 9: ...gle phase 230V 50Hz 6 75 0 30 SNB130FGBH T 900 U V 0 98 U W 0 98 V W 0 98 RC0J60 AA WHT BLK 15 2 BLK RED 15 2 RED WHT 15 2 840 850 330 53 2 1 60 450 NEO22 Cooling 6 45 2 940 1 650 53 51 800 480 Heating 6 05 2 940 2 210 55 53 800 620 Single phase 230V 50Hz 9 75 0 30 SNB130FLDH or SNB130FLDH1 850 U V 0 45 U W 0 45 V W 0 45 RC0J60 AA WHT BLK 15 2 BLK RED 15 2 RED WHT 15 2 840 850 330 53 2 1 80 FLDH 4...

Page 10: ...nts Specifications and rating conditions of main electric parts Model Item Smoothing capacitor Current transformer Current transformer Fuse Fuse Fuse Intelligent power module High pressure switch Intelligent power module Reactor Expansion valve coil Power factor controller Resistor Resistor Resistor Solenoid coil relay Terminal block Terminal block Relay R V coil CB1 2 3 CT1 2 CT61 F64 F801 F911 H...

Page 11: ... DC 12 V LEV 23 mH L61 Reactor Current detecting resistor R61 45 mΩ 5 W 1 element 2 elements R61 R62 2 elements R825 R937 R938 R939 R937A R937B Current limiting PTC thermistor PTC64 PTC65 3 P TB1 TB2 Terminal block Relay X63 X64 21S4 R V coil TR821 IGBT H X66 Heater protector 26H 25 A 600 V 15 A 600 V 20 A 600 V 100 mΩ 5 W 180 mΩ 5 W 25 mΩ 5 W 430 mΩ 2 W 1 1 Ω 2 W 33 Ω 3 A 250 V 20 A 250 V AC 220 ...

Page 12: ...D OF HEARING FOR CONTINUOUS NOISE COOLING FUNCTION SPL dB A LINE FAN SPEED HEATING 47 48 Test conditions Cooling Dry bulb temperature 35 Wet bulb temperature 24 Heating Dry bulb temperature 7 Wet bulb temperature 6 OUTDOORUNIT MICROPHONE 1m High Med SUZ KA35VA TH SUZ KA35VAH TH COOLING FUNCTION SPL dB A LINE High FAN SPEED HEATING 53 55 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000...

Page 13: ...5 Gas refrigerant pipe joint Refrigerant pipe flared 9 52 4 3 3 5 2 holes 10 21 Drain hole 33 SUZ KA25 KA35VAH REQUIRED SPACE Basically open 100mm or more without any obstruction in front and on both sides of the unit 350mm or more 200mm or more 100mm or more 100mm or more Open two sides of left right or rear side Drain hole 42 SUZ KA25 KA35VA Unit mm OUTDOOR UNIT SUZ KA25VA TH SUZ KA25VAH TH SUZ ...

Page 14: ...m or more if the back both sides and top are open 350mm or more 100mm or more Service panel Gas refrigerant pipe joint Refrigerant pipe flared 12 7 SUZ KA50VA 15 88 SUZ KA60 KA71VA Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 SUZ KA50 KA60VA 9 52 SUZ KA71VA REQUIRED SPACE Drain holes 33 OUTDOOR UNIT SUZ KA50VA TH SUZ KA50VA1 TH SUZ KA50VAR2 TH SUZ KA60VA TH SUZ KA60VA1 TH SUZ KA60VAR...

Page 15: ...STOR TRANSFORMER RELAY REVERSING VALVE COIL EXPANSION VALVE COIL NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector MODELS WIRING DIAGRAM F61 GRN N 230V 12 24V 230V 50Hz CIRCUIT BREAKER PE RED BLU WHITE GRN YLW TB1 POWER SUPPLY L N TB2 S3 S1 TO I...

Page 16: ...KA25VAR1 TH SUZ KA35VAR1 TH NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block ...

Page 17: ... VALVE COIL DEFROST HEATER HEATER PROTECTOR NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block Connector MODELS WIRING DIAGRAM IC932 F901 CT 4 3 NR64 NR63 GRN DSA61 LDE 2 3 1 4 5 CN601 LDY GRN MF RT65 RT64 RT62 RT61 3 1 2 4 5 2 1 3 2 1 2 4 5 1 3 CN931 CN93...

Page 18: ...A25VAHR1 TH SUZ KA35VAHR1 TH NOTES 1 About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block ...

Page 19: ... CN2 2 7 TAB4 V MC W U V WHT RT61 RT62 RT68 LEV MODELS WIRING DIAGRAM OUTDOOR UNIT Terminal block Connector 3 Symbols below indicate 2 Use copper conductors only for field wiring diagram for servicing refer to the indoor unit electric wiring 1 About the indoor side electric wiring NOTES SYMBOL NAME SYMBOL NAME CURRENT TRANSFORMER FUSE T1AL 250V LEV EXPANSION VALVE COIL L REACTOR IPM INTELLIGENT PO...

Page 20: ...lectric wiring 1 About the indoor side electric wiring NOTES SYMBOL NAME SYMBOL NAME SMOOTHING CAPACITOR FUSE T20AL 250V LEV EXPANSION VALVE COIL L61 REACTOR HC930 IPM INTELLIGENT POWER DEVICE C61 62 63 DIODE MODULE DB61 DB65 CT CURRENT TRANSFORMER F701 F801 F901 INTELLIGENT POWER MODULE F61 DSA SURGE ABSORBER FAN MOTOR CIRCUIT PROTECTION RT61 DISCHARGE TEMP THERMISTOR R937A B MF MC COMPRESSOR R82...

Page 21: ... 2 CURRENT TRANSFORMER HC930 INTELLIGENT POWER MODULE F911 F801 FUSE T3 15AL 250V SMOOTHING CAPACITOR CB1 3 FAN MOTOR POWER FACTOR CONTROLLER NOISE FILTER RT61 DISCHARGE TEMP THERMISTOR RS1 4 RESISTOR R937A B RESISTOR MF MC COMPRESSOR R64A B RESISTOR PFC NF NR64 VARISTOR AMBIENT TEMP THERMISTOR SOLENOID COIL RELAY 21S4 REVERSING VALVE COIL X64 RELAY TB1 TERMINAL BLOCK TB2 TERMINAL BLOCK RT65 FIN T...

Page 22: ...MC W U V WHT RT61 RT62 RT68 LEV MODEL WIRING DIAGRAM OUTDOOR UNIT Terminal block Connector 3 Symbols below indicate 2 Use copper conductors only for field wiring diagram for servicing refer to the indoor unit electric wiring 1 About the indoor side electric wiring NOTES SYMBOL NAME SYMBOL NAME CURRENT TRANSFORMER FUSE T1AL 250V LEV EXPANSION VALVE COIL L REACTOR IPM INTELLIGENT POWER MODULE HPS HI...

Page 23: ...coil heating ON cooling OFF Strainer 100 Muffler Muffler Ambient temperature thermistor RT65 Muffler OUTDOOR UNIT SUZ KA25VAR1 TH SUZ KA25VAHR1 TH Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve with strainar Stop valve with service port Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in heating Refrigerant pipe ø9 52...

Page 24: ...3 0 ø1 8 600 2 LEV Ambient temperature thermistor Muffler Capillary tube ø3 0 ø2 0 240 Outdoor heat exchanger temperature thermistor Muffler RT65 RT68 Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve with strainer Stop valve with service port Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in hea...

Page 25: ... Muffler 100 Strainer 100 Receiver Outdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65 Strainer 100 Unit mm SUZ KA50VAR2 TH Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve with strainer Stop valve with service port Capillary tube ø3 6 ø2 4 50 Compressor 4 way valve Refrigerant pip...

Page 26: ... Receiver Outdoor heat exchanger temperature thermistor RT68 Strainer 100 Strainer 100 Ambient temperature thermistor RT65 Unit mm Unit mm SUZ KA60VAR2 TH Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve with service port Capillary tube 3 6 2 4 50 Refrigerant flow in cooling Compressor 4 way valve Refrige...

Page 27: ...AR1 TH SUZ KA25VAHR1 TH Refrigerant Piping Max length A Height difference should be within 12m regardless of which unit indoor or outdoor position is high Max Height difference 12m Indoor unit SLZ SEZ Outdoor unit MAX HEIGHT DIFFERENCE Refrigerant piping Max length m A 20 Gas 9 52 Liquid 6 35 Piping size O D mm Models SUZ KA25VA TH SUZ KA35VA TH SUZ KA25VAH TH SUZ KA35VAH TH SUZ KA25VAR1 TH SUZ KA...

Page 28: ... TH Model Piping size O D mm Refrigerant piping length one way Outdoor unit precharged 15m 160 160 20m 260 260 25m 360 360 30m 460 460 7m 0 0 10m 60 60 Model SUZ KA50VA TH SUZ KA50VA1 TH SUZ KA50VAR2 TH SUZ KA60VA TH SUZ KA60VA1 TH SUZ KA60VAR2 TH 1 600 1 800 ADDITIONAL REFRIGERANT CHARGE R410A g Calculation Xg 20g m o Refrigerant piping length m 7 SUZ KA50VA TH SUZ KA50VA1 TH SUZ KA50VAR2 TH SUZ ...

Page 29: ...ndoor air wet dry bulb temperature difference on the side of the chart on page shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service How to measure the indoor air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air inlet as shown in...

Page 30: ...ency Outdoor intake air Dry bulb temperature 10 5 0 5 10 15 20 25 30 35 40 45 46 Outdoor intake air Dry bulb temperature Indoor intake air Wet bulb temperature 10 5 0 5 10 15 20 25 30 35 40 45 46 Indoor air Wet bulb temperature difference degree SUZ KA25VA H 6 4 5 9 5 4 5 0 4 5 4 1 at Rated frequency Outdoor intake air Dry bulb temperature Outdoor intake air Dry bulb temperature Indoor intake air ...

Page 31: ... 1 5 1 0 0 5 0 0 Correction of Heating total input Input correction factors The operational frequency of compressor 0 50 100 150 Hz 2 0 1 5 1 0 0 5 0 0 0 50 100 150 Hz Correction of Heating capacity Capacity correction factors The operational frequency of compressor SUZ KA25VA H SUZ KA35VA H SUZ KA35VA H SUZ KA35VA H SUZ KA35VA H SUZ KA25VA H SUZ KA25VA H SUZ KA25VA H SUZ KA50VA SUZ KA50VA SUZ KA5...

Page 32: ...A50VA MPa Gauge kgf Gauge 18 32 15 20 50 25 60 30 70 35 C 0 2 0 4 0 6 0 8 1 0 1 2 1 4 Ambient temperature C Ambient humidity Outdoor low pressure SUZ KA50VA 2 4 6 8 10 12 14 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 Both indoor and outdoor unit are under the same temperature humidity condition 2 Air flow High speed 3 Operation TEST RUN OPERATION Dry bulb temperature Relative h...

Page 33: ... the side of the chart on page shows the difference between the indoor intake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service How to measure the indoor air wet bulb dry bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air inlet as shown in the figure and at least 2 sets of wet and dry b...

Page 34: ...Indoor air Wet bulb temperature difference degree SUZ KA35VA H at Rated frequency Outdoor intake air Dry bulb temperature 10 5 0 5 10 15 20 25 30 35 40 45 46 Outdoor intake air Dry bulb temperature Indoor intake air Wet bulb temperature 10 5 0 5 10 15 20 25 30 35 40 45 46 Indoor air Wet bulb temperature difference degree SUZ KA25VA H at Rated frequency Outdoor intake air Dry bulb temperature Outdo...

Page 35: ... 5 22 6 20 7 18 9 17 0 15 1 13 2 11 3 SUZ KA50VA at Rated frequency 25 3 23 3 21 4 19 4 17 5 15 5 13 6 11 7 SUZ KA60VA at Rated frequency Indoor air Dry bulb temperature difference degree Indoor intake air Dry bulb temperature Outdoor intake air Wet bulb temperature Outdoor intake air Wet bulb temperature Indoor intake air Dry bulb temperature 25 3 23 3 21 4 19 4 17 5 15 5 13 6 11 7 SUZ KA71VA at ...

Page 36: ...of Cooling capacity Capacity correction factors The operational frequency of compressor Correction of Cooling total input Input correction factors The operational frequency of compressor 0 50 100 150 Hz 0 0 0 5 1 0 1 5 2 0 1 5 1 0 0 5 0 0 Correction of Heating total input Input correction factors The operational frequency of compressor 0 50 100 150 Hz 2 0 1 5 1 0 0 5 0 0 0 50 100 150 Hz Correction...

Page 37: ...2 18 Outdoor unit current A Ambient temperature C Ambient humidity SUZ KA25VA H MPa Gauge kgf Gauge 18 32 15 20 50 25 60 30 70 35 C 0 2 0 4 0 6 0 8 1 0 1 2 1 4 Ambient temperature C Ambient humidity Outdoor low pressure SUZ KA71VA 2 4 6 8 10 12 14 Ambient temperature C Ambient humidity 15 20 50 25 60 30 70 35 C 4 6 8 10 12 32 18 Outdoor unit current A SUZ KA71VA Dry bulb temperature Relative humid...

Page 38: ... 5 3 0 2 5 2 0 1 5 1 0 2 5 10 15 20 25 SUZ KA71VA Outdoor unit current A Ambient temperature C 13 0 12 0 11 0 10 0 9 0 8 0 7 0 2 5 10 15 20 25 SUZ KA35VA H Outdoor unit current A Ambient temperature C 4 0 3 5 3 0 2 5 2 0 1 5 1 0 2 5 10 15 20 25 SUZ KA50VA Outdoor unit current A Ambient temperature C 7 0 6 0 5 0 4 0 3 0 2 0 1 0 2 5 10 15 20 25 SUZ KA60VA Outdoor unit current A Ambient temperature C...

Page 39: ...0 60 628 3 23 1 94 0 60 662 3 15 1 89 0 60 683 3 05 1 83 0 60 718 3 45 1 66 0 48 662 3 35 1 61 0 48 697 3 30 1 58 0 48 718 3 20 1 54 0 48 738 2 94 2 94 1 00 552 2 81 2 81 1 00 580 2 70 2 70 1 00 607 2 60 2 60 1 00 635 3 06 2 70 0 88 580 2 94 2 59 0 88 614 2 85 2 51 0 88 628 2 75 2 42 0 88 656 3 19 2 42 0 76 600 3 08 2 34 0 76 638 3 00 2 28 0 76 656 2 88 2 19 0 76 683 3 35 2 14 0 64 628 3 23 2 06 0...

Page 40: ...2 25 0 92 676 2 25 2 07 0 92 718 2 08 1 91 0 92 745 2 58 2 06 0 80 704 2 40 1 92 0 80 738 2 23 1 78 0 80 780 2 73 1 85 0 68 731 2 55 1 73 0 68 773 2 38 1 62 0 68 800 2 88 1 61 0 56 759 2 70 1 51 0 56 794 2 55 1 43 0 56 828 3 03 1 33 0 44 787 2 85 1 25 0 44 821 2 68 1 18 0 44 856 2 45 2 35 0 96 676 2 25 2 16 0 96 718 2 08 1 99 0 96 745 2 58 2 16 0 84 704 2 40 2 02 0 84 738 2 23 1 87 0 84 780 2 73 1...

Page 41: ... 71 943 3 99 2 83 0 71 965 3 85 2 73 0 71 1007 4 46 2 63 0 59 922 4 31 2 54 0 59 981 4 20 2 48 0 59 1007 4 03 2 37 0 59 1049 4 69 2 20 0 47 965 4 52 2 12 0 47 1018 4 41 2 07 0 47 1049 4 27 2 01 0 47 1102 4 83 1 69 0 35 1018 4 69 1 64 0 35 1071 4 62 1 62 0 35 1102 4 48 1 57 0 35 1134 4 11 3 58 0 87 848 3 94 3 43 0 87 890 3 78 3 29 0 87 933 3 64 3 17 0 87 975 4 29 3 22 0 75 890 4 11 3 08 0 75 943 3 ...

Page 42: ...3 15 2 61 0 83 1102 2 91 2 41 0 83 1145 3 61 2 56 0 71 1081 3 36 2 39 0 71 1134 3 12 2 21 0 71 1198 3 82 2 25 0 59 1124 3 57 2 11 0 59 1187 3 33 1 96 0 59 1230 4 03 1 89 0 47 1166 3 78 1 78 0 47 1219 3 57 1 68 0 47 1272 4 24 1 48 0 35 1208 3 99 1 40 0 35 1261 3 75 1 31 0 35 1314 3 43 2 98 0 87 1039 3 15 2 74 0 87 1102 2 91 2 53 0 87 1145 3 61 2 70 0 75 1081 3 36 2 52 0 75 1134 3 12 2 34 0 75 1198 ...

Page 43: ...62 3 13 2 60 2 02 1 36 3 83 3 35 2 83 2 25 1 60 4 04 3 57 3 06 2 49 1 85 4 24 3 78 3 28 2 73 2 10 4 45 4 00 3 51 2 97 2 34 4 66 4 22 3 73 3 20 2 59 4 86 4 43 3 96 3 44 2 84 4 97 5 24 4 97 5 24 5 52 4 97 5 24 5 52 4 97 5 24 5 52 5 80 5 24 5 52 5 80 4 97 5 24 5 52 5 80 6 07 4 97 5 24 5 52 5 80 6 07 4 97 5 24 5 52 5 80 6 07 4 97 5 24 5 52 5 80 6 07 4 97 5 24 5 52 5 80 6 07 4 97 5 24 5 52 5 80 6 07 4 ...

Page 44: ...46 0 34 0 22 0 74 0 62 0 50 0 38 0 26 0 78 0 66 0 54 0 42 0 30 0 82 0 70 0 58 0 46 0 34 0 86 0 74 0 62 0 50 0 38 0 90 0 78 0 66 0 54 0 42 0 94 0 82 0 70 0 58 0 46 1695 1744 1695 1744 1826 1695 1744 1826 1695 1744 1826 1875 1744 1826 1875 1695 1744 1826 1875 1940 1695 1744 1826 1875 1940 1695 1744 1826 1875 1940 1695 1744 1826 1875 1940 1695 1744 1826 1875 1940 1695 1744 1826 1875 1940 1695 1744 18...

Page 45: ...13 2 94 2 00 0 68 650 2 85 1 94 0 68 664 2 75 1 87 0 68 694 3 19 1 79 0 56 635 3 08 1 72 0 56 675 3 00 1 68 0 56 694 2 88 1 61 0 56 723 3 35 1 47 0 44 664 3 23 1 42 0 44 701 3 15 1 39 0 44 723 3 05 1 34 0 44 759 3 45 1 10 0 32 701 3 35 1 07 0 32 737 3 30 1 06 0 32 759 3 20 1 02 0 32 781 2 94 2 47 0 84 584 2 81 2 36 0 84 613 2 70 2 27 0 84 642 2 60 2 18 0 84 672 3 06 2 21 0 72 613 2 94 2 12 0 72 65...

Page 46: ... 96 0 80 715 2 25 1 80 0 80 759 2 08 1 66 0 80 788 2 58 1 75 0 68 745 2 40 1 63 0 68 781 2 23 1 51 0 68 825 2 73 1 53 0 56 774 2 55 1 43 0 56 818 2 38 1 33 0 56 847 2 88 1 27 0 44 803 2 70 1 19 0 44 840 2 55 1 12 0 44 876 3 03 0 97 0 32 832 2 85 0 91 0 32 869 2 68 0 86 0 32 905 2 45 2 06 0 84 715 2 25 1 89 0 84 759 2 08 1 74 0 84 788 2 58 1 85 0 72 745 2 40 1 73 0 72 781 2 23 1 60 0 72 825 2 73 1 ...

Page 47: ...71 943 3 99 2 83 0 71 965 3 85 2 73 0 71 1007 4 46 2 63 0 59 922 4 31 2 54 0 59 981 4 20 2 48 0 59 1007 4 03 2 37 0 59 1049 4 69 2 20 0 47 965 4 52 2 12 0 47 1018 4 41 2 07 0 47 1049 4 27 2 01 0 47 1102 4 83 1 69 0 35 1018 4 69 1 64 0 35 1071 4 62 1 62 0 35 1102 4 48 1 57 0 35 1134 4 11 3 58 0 87 848 3 94 3 43 0 87 890 3 78 3 29 0 87 933 3 64 3 17 0 87 975 4 29 3 22 0 75 890 4 11 3 08 0 75 943 3 9...

Page 48: ... 15 2 61 0 83 1102 2 91 2 41 0 83 1145 3 61 2 56 0 71 1081 3 36 2 39 0 71 1134 3 12 2 21 0 71 1198 3 82 2 25 0 59 1124 3 57 2 11 0 59 1187 3 33 1 96 0 59 1230 4 03 1 89 0 47 1166 3 78 1 78 0 47 1219 3 57 1 68 0 47 1272 4 24 1 48 0 35 1208 3 99 1 40 0 35 1261 3 75 1 31 0 35 1314 3 43 2 98 0 87 1039 3 15 2 74 0 87 1102 2 91 2 53 0 87 1145 3 61 2 70 0 75 1081 3 36 2 52 0 75 1134 3 12 2 34 0 75 1198 3...

Page 49: ... 33 3 82 3 26 2 64 1 94 4 56 4 05 3 51 2 90 2 21 4 78 4 29 3 75 3 16 2 48 5 01 4 52 4 00 3 42 2 75 5 23 4 76 4 24 3 68 3 02 5 46 4 99 4 49 3 93 3 28 5 63 5 23 4 74 4 19 3 55 5 40 5 70 5 40 5 70 6 00 5 40 5 70 6 00 5 40 5 70 6 00 6 30 5 70 6 00 6 30 5 40 5 70 6 00 6 30 6 60 5 40 5 70 6 00 6 30 6 60 5 40 5 70 6 00 6 30 6 60 5 40 5 70 6 00 6 30 6 60 5 40 5 70 6 00 6 30 6 60 5 40 5 70 6 00 6 30 6 60 5...

Page 50: ... 53 0 41 0 29 0 81 0 69 0 57 0 45 0 33 0 85 0 73 0 61 0 49 0 37 0 89 0 77 0 65 0 53 0 41 0 93 0 81 0 69 0 57 0 45 0 97 0 85 0 73 0 61 0 49 1 00 0 89 0 77 0 65 0 53 1851 1905 1851 1905 1994 1851 1905 1994 1851 1905 1994 2047 1905 1994 2047 1851 1905 1994 2047 2118 1851 1905 1994 2047 2118 1851 1905 1994 2047 2118 1851 1905 1994 2047 2118 1851 1905 1994 2047 2118 1851 1905 1994 2047 2118 1851 1905 1...

Page 51: ... 76 4 20 3 59 2 91 2 14 5 01 4 46 3 86 3 19 2 43 5 26 4 72 4 13 3 48 2 73 5 51 4 98 4 40 3 76 3 02 5 75 5 23 4 67 4 04 3 32 6 00 5 49 4 94 4 33 3 61 6 19 5 75 5 21 4 61 3 91 5 94 6 27 5 94 6 27 6 60 5 94 6 27 6 60 5 94 6 27 6 60 6 93 6 27 6 60 6 93 5 94 6 27 6 60 6 93 7 26 5 94 6 27 6 60 6 93 7 26 5 94 6 27 6 60 6 93 7 26 5 94 6 27 6 60 6 93 7 26 5 94 6 27 6 60 6 93 7 26 5 94 6 27 6 60 6 93 7 26 5...

Page 52: ... 53 0 41 0 29 0 81 0 69 0 57 0 45 0 33 0 85 0 73 0 61 0 49 0 37 0 89 0 77 0 65 0 53 0 41 0 93 0 81 0 69 0 57 0 45 0 97 0 85 0 73 0 61 0 49 1 00 0 89 0 77 0 65 0 53 2038 2097 2038 2097 2195 2038 2097 2195 2038 2097 2195 2254 2097 2195 2254 2038 2097 2195 2254 2332 2038 2097 2195 2254 2332 2038 2097 2195 2254 2332 2038 2097 2195 2254 2332 2038 2097 2195 2254 2332 2038 2097 2195 2254 2332 2038 2097 2...

Page 53: ...3 0 44 2362 8 95 3 94 0 44 2435 8 66 3 81 0 44 2558 27 26 9 80 3 14 0 32 2362 9 51 3 04 0 32 2485 9 37 3 00 0 32 2558 9 09 2 91 0 32 2632 28 18 8 34 7 01 0 84 1968 7 99 6 71 0 84 2066 7 67 6 44 0 84 2165 7 38 6 20 0 84 2263 28 20 8 70 6 26 0 72 2066 8 34 6 01 0 72 2189 8 09 5 83 0 72 2239 7 81 5 62 0 72 2337 28 22 9 05 5 43 0 60 2140 8 73 5 24 0 60 2276 8 52 5 11 0 60 2337 8 17 4 90 0 60 2435 28 2...

Page 54: ...4 8 17 3 59 0 44 2706 7 67 3 37 0 44 2829 7 24 3 19 0 44 2952 27 26 8 59 2 75 0 32 2804 8 09 2 59 0 32 2927 7 60 2 43 0 32 3050 28 18 6 96 5 84 0 84 2411 6 39 5 37 0 84 2558 5 89 4 95 0 84 2657 28 20 7 31 5 27 0 72 2509 6 82 4 91 0 72 2632 6 32 4 55 0 72 2780 28 22 7 74 4 64 0 60 2608 7 24 4 35 0 60 2755 6 75 4 05 0 60 2854 28 24 8 17 3 92 0 48 2706 7 67 3 68 0 48 2829 7 24 3 48 0 48 2952 28 26 8 ...

Page 55: ...KA25VA L SUZ KA25VA H at Rated frequency CAPACITY 3 0 kW INPUT 830 W SLZ KA35VA L SUZ KA35VA H at Rated frequency CAPACITY 4 0 kW INPUT 1100 W SLZ KA50VA L SUZ KA50VA at Rated frequency CAPACITY 5 0 kW INPUT 1550 W OUTDOOR W B INDOOR 10 D B 5 0 5 10 15 20 15 21 26 OUTDOOR W B INDOOR 10 D B 5 0 5 10 15 20 15 21 26 3 15 3 00 2 70 1008 1085 1163 3 80 3 60 3 35 1209 1287 1364 4 45 4 25 3 95 1364 1426 ...

Page 56: ...INPUT 5 Q INPUT 10 Q INPUT 15 Q INPUT 20 Q INPUT 15 21 26 5 10 4 86 4 37 1534 1652 1770 6 16 5 83 5 43 1841 1959 2077 7 21 6 89 6 40 2077 2171 2289 8 26 7 86 7 45 2242 2336 2454 9 32 8 91 8 51 2384 2454 2572 10 29 9 88 9 48 2454 2525 2643 11 34 10 89 10 53 2502 2620 2714 SEZ KC25VA SUZ KA25VA H at Rated frequency CAPACITY 3 0 kW INPUT 830 W SEZ KA35VA SUZ KA35VA H at Rated frequency CAPACITY 4 0 k...

Page 57: ...FF ON OFF COOL 5 seconds HEAT 5 seconds ON or OFF ON or OFF 10 1 Outdoor fan motor control The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running SUZ KA25VA H R1 TH SUZ KA35VA H R1 TH e s o p r u P r o s n e S Actuator Compressor LEV Outdoor fan m...

Page 58: ...oubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and turn off the breaker 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and t...

Page 59: ...e failure mode recall function by the following procedures With the remote controller headed towards the indoor unit press any button that is not used in this failure mode recall function e g TIMER button OR Turn OFF the power supply and turn ON it again Press RESET button of the remote controller Judgment of indoor outdoor abnormality 1 Press OPERATE STOP ON OFF button of the remote controller th...

Page 60: ... E9 Indoor outdoor unit communication error Transmitting error Outdoor unit 2 UP Compressor overcurrent interruption 3 U3 U4 Open short of outdoor unit thermistors 4 UF Compressor overcurrent interruption When compressor locked 5 U2 Abnormal high discharging temperature insufficient refrigerant 6 U1 Ud Abnormal high pressure 63H worked Overheating protection operation 7 U5 Abnormal temperature of ...

Page 61: ...t occurs in the output of the intelligent power module IPM When the compressor winding shorts out When 14A SUZ KA25VA H 24A SUZ KA35VA H current flow into intelligent power module IPM When waveform of compressor current is distorted When discharge temperature exceeds 116 When the indoor coil themistor TH5 exceeds 70 in HEAT mode When the defrost thermistor exceeds 70 in COOL mode When discharge te...

Page 62: ...t circuit is detected in the thermistor during operation or when an open circuit is detected in the thermistor after 5 minutes in cooling and 10 minutes in heating of compressor start up When nonvolatile memory data cannot be read properly unit stops When the communication between boards protection stop is continuously performed twice Communication error occurs between the electronic control P C b...

Page 63: ...switch HPS during operation When the indoor coil thermistor TH5 exceeds 70 in HEAT mode When the outdoor heat exchanger thermistor exceeds 70 in COOL mode When the frequency of the compressor is kept 80Hz or more and discharge temperature is kept under 39 for more than 20 minutes When outdoor fan has stopped within 30 seconds 3 times in a row after outdoor fan start up unit stops When IPM protecti...

Page 64: ...or exceeds 70 C in HEAT mode Temperature defrost thermistor exceeds 70 C in COOL mode Check refrigerant circuit and refrigerant amount Check stop valve Fin temperature P C board temperature 7 time flash 2 5 seconds OFF Temperature of fin temperature thermistor on the inverter P C board exceeds 75 80 C or temperature of P C board temperature thermistor on the inverter P C board exceeds 70 75 C Chec...

Page 65: ...ompressor Replace inverter P C board Check refrigerant circuit and refrigerant amount Refer to 12 5 Check of LEV Check around outdoor unit Check outdoor unit air passage Refer to 12 5 Check of outdoor fan motor Check refrigerant circuit and refrigerant amount Check stop valve The unit is normal but check the following Check if indoor filters are clogged Check if refrigerant is short Check if indoo...

Page 66: ...ion 8 times Goes out Converter protection Replace the power board Bus bar voltage protection 1 Replace the power board Bus bar voltage protection 2 13 times Goes out Outdoor fan motor Refer to 12 5 Check of outdoor fan motor Lighting 8 times Current sensor protection Replace the power board Lighting 11 times Communication between P C boards protection Check the connecting wire between outdoor elec...

Page 67: ...heck the following points Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled Twice Lighting Once Lighting When the discharge temperature exceeds 100 during operation When the frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 39 for more than 20 minutes When the outdoor heat exchan...

Page 68: ...eeds 70 75 C Check around outdoor unit Check outdoor unit air passage fan motor 10 5 time flash 2 5 seconds OFF High pressure protec tion Indoor coil thermistor exceeds 70 C in HEAT mode Defrost thermistor exceeds 70 C in COOL mode Check refrigerant circuit and refrig erant amount Check stop valve 11 8 time flash 2 5 seconds OFF Compressor synchro nous abnormality The waveform of compressor curren...

Page 69: ...ld the thermistor with your hands to warm it up Refer to 12 6 Test point diagram and voltage 12 6 1 or 12 6 3 Inverter P C board for the chart of thermistor Defrost thermistor RT61 Fin temperature thermistor RT64 31 41 Measure the resistance between the terminals with a tester Part temperature 20 C 40 C Compressor Defrost heater SUZ KA VAH Measure the resistance with a tester Part temperature 20 C...

Page 70: ...trol P C board or 12 6 7 Inverter P C board for the chart of thermistor Color of the lead wire Color of the lead wire Discharge temperature thermistor RT62 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Refer to 12 6 Test point diagram and voltage 12 6 4 Outdoor electronic control P C board or 12 6 7 Inverter P C board for the chart of the...

Page 71: ...asuring the balance of voltage between terminals Operation method Start cooling or heating operation by pressing the EMERGENCY OPERATION switch on the indoor unit test run mode refer to page 31 for SLZ SUZ and 37 for SEZ SUZ Measurement point Measure AC voltage between the lead wires at 3 points BLK U WHT V BLK U RED W WHT V RED W NOTE 1 Output voltage varies according to power supply voltage 2 Me...

Page 72: ...sor operation time more than 10 seconds No Check the refrigerant circuit Yes Connect the compressor and activate the inverter Then measure the time until the inverter stops due to over current Operation method For wireless remote controller use model Start heating or cooling operation by pressing the EMERGENCY OPERATION switch on the indoor unit Test run mode For wired remote controller use model ...

Page 73: ...connected or R V coil is open voltage is generated between the terminal pins of the connector although no signal is being transmitted to R V coil Check if CN721 is connected Unit operates COOL mode even if it is set to HEAT mode Unit operates HEAT mode even if it is set to COOL mode The thermistors in the outdoor unit are abnormal Check of outdoor thermistors G SUZ KA25 35VA H TH Measure the resis...

Page 74: ...o No Replace the indoor electronic control P C board No Yes No Indoor outdoor connecting wire Replace the inverter P C board DB61 280V 370V DC Inverter P C board Solder side Is there voltage 230V AC between the indoor terminal block S1 and S2 Rectify indoor outdoor connecting wire Does POWER lamp on the indoor unit light up Does the voltage between each terminal repeat 5V and 0V DC by turns Does t...

Page 75: ...ick click Do you feel the expansion valve vibrate on touching it Does the resistance of LEV have the characteristics Refer to 12 4 Measure each voltage between connector pins of CN724 on the inverter P C board 1 Pin Pin 2 Pin Pin 3 Pin Pin 4 Pin Pin Is there about 3 5V AC between each NOTE Measure the voltage by an analog tester No Yes Yes Yes No Replace the expansion valve Yes No No Properly fix ...

Page 76: ...ng electric continuity 1 Does the resistance of ambient temperature thermistor have the characteristics Refer to 12 6 1 2 Is the resistance of defrost heater normal Refer to 12 4 3 Does the heater protector remain conducted not open 4 Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors 26H CN726 CN722 H 2 1 2 1 2 3 Outdoor base gets frozen SUZ KA2...

Page 77: ... 10 time No No Is the fuse F901 blown on the inverter P C board Replace the inverter P C board CN931 CN932 Inverter P C board Solder side Check the corresponding parts following LED indication Refer to 12 3 Operate the outdoor unit by starting EMERGENCY OPERATION Check the connection of the connectors CN931 CN932 of outdoor fan motor If the connection is poor make it correct Check the outdoor fan ...

Page 78: ... is S2 and S3 1 B Turn ON the power supply Check the wiring Make them correct Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage Replac...

Page 79: ...trol P C board during the operation Be sure to confirm the wiring is correct before the operation starts 3 Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C board is normal LED blinks 6 times after 3 minutes Lighted or not lighted No Yes No Yes 2 Be careful of the residual voltage of smo...

Page 80: ...om antennas receiver 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON...

Page 81: ...in power supply circuit Is there voltage of 230V AC in the power supply terminal block Is the output voltage from the noise filter P C board 230V AC Is the input voltage to the outdoor electronic control P C board 325V DC Check the power supply cable Replace the outdoor electronic control P C board Replace the noise filter P C board Is fuse F64 blown Is the input voltage to the power board 230V AC...

Page 82: ...ere amplitude of 10 to 20V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage Replace the indoor electronic control P C board Replace the inverter P C board or the outdoor electronic control P C board 2 Is there any error of the indoor outdoor connecting wire such as the damage of th...

Page 83: ...ing ON After 3 minutes LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C board is normal LED blinks 6 times after 3 minutes Lighted or OFF No Yes No Yes 2 Be careful of the residual voltage of smoothing capacitor Be sure to release the failure mode recall function after checking Yes Yes No Yes Turn OFF the power supply Check once more if the indoor outdoor c...

Page 84: ...nector CN912 in noise filter P C board Is there normal resistance to R V coil 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning on the power supply start EMERGENCY OPERATION in COOL mode Is there voltage of 230V AC between pin1 and pin 2 at connector CN912 1 Turn off power supply of indoor and outdoor unit and disconnect the connector CN781 in the outdoor electronic co...

Page 85: ...rning on the power supply start EMERGENCY OPERATION Is output balanced Clarify the causes by counting time until the inverter stops 0 to 10 seconds compressor rare short 10 to 60 seconds compressor lock 60 seconds to 5minutes refrigerant circuit defective 5 minutes or more normal Measure the voltage between each lead wire leading to the compressor U BLK V WHT V WHT W RED W RED U BLK Is voltage out...

Page 86: ... electronic control P C board Disconnect the connector in the outdoor electronic control P C board or the outdoor power board see below table and measure the resistance of thermistor Is the thermistor normal Does thermistor operate 10 minutes or more though the thermistor abnormality is not displayed Replace the thermistor Normal Replace the outdoor electronic control P C board Check of outdoor fa...

Page 87: ...UZ KA60VAR2 TH SUZ KA71VA 1 TH Outdoor unit does not operate at all or stops immediately due to overcurrent Check of current limiting resistor Y Turn ON the power supply and press EMERGENCY OPERATION switch Replace the outdoor electronic control P C board or power P C board or the compressor Replace the noise filter P C board or the outdoor electronic control P C board Does the rush current limiti...

Page 88: ...sing EMERGENCY OPERATION switch on the indoor unit TEST RUN OPERATION Refer to page 31 for SLZ SUZ and page 37 for SEZ SUZ Measurement point At 3 points BLK U WHT V BLK U RED W WHT V RED W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this check LED of the inverter P C board flashes 9 times Refer to 12 6 3 KA25 35VA or 12 6 7 Re...

Page 89: ... RT64 Between CN642 pin1 and pin2 Ambient temperature RT65 Between CN643 pin1 and pin2 Outdoor heat exchanger temperature RT68 Between CN644 pin1 and pin3 Replace the thermistor except RT64 When RT64 is abnormal replace the inverter P C board or the outdoor power board Replace the inverter P C board or the outdoor power board No No Is the thermistor normal Refer to 12 6 3 or 12 6 7 Reconnect the c...

Page 90: ...tween the compressor and the intelligent power module Turn ON the power supply and press EMERGENCY OPERATION switch twice HEAT mode Disconnect connector CN61 between the compressor and the intelligent power module Turn ON the power supply and press EMERGENCY OPERATION switch once COOL mode SUZ KA25 35VA H R1 TH SUZ KA50VAR2 TH Is the resistance between each ter minal of outdoor fan motor normal Re...

Page 91: ...ed operations 1 Turn OFF the power supply and turn ON it again 2 Press RESET button on the remote controller 1 Regardless of normal or abnormal condition a short beep is emitted once the signal is received Measure each voltage between connector pins of CN724 on the inverter P C board 1 Pin Pin 2 Pin Pin 3 Pin Pin 4 Pin Pin Is there about 3 5 VAC between each NOTE Measure the voltage by an analog t...

Page 92: ...f the LEV coil with a hand Yes Check the outdoor fan motor Refer to i Is the fuse F901 blown on the in verter P C board Check the connection of the connectors CN931 CN932 of the outdoor fan mo tor If the connection is poor make it correct Operate the outdoor unit by starting EMERGENCY OPERATION Check the LED indication on the in verter P C board Does the LED flash 10 times Replace the inverter P C...

Page 93: ...outdoor electronic control P C board repeat 3 6 second OFF and 0 8 second ON quick blinking 3 Yes No Lighted or not lighted Replace the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of ...

Page 94: ...lectronic control P C board repeat 3 6 second OFF and 0 8 second ON quick blinking 3 Yes No Lighted or not lighted Replace the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20 ...

Page 95: ... condition combination of specific conditions such as antennas or wiring Check the following before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the...

Page 96: ...RT64 CN642 Ambient temperature thermistor RT65 CN643 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN641 LEV connector CN724 230V AC DB61 Connecting wire with power P C board CN725 Jumper wire for change in defrost setting JS Front side of unit DB61 280V 370V DC Smoothing capacitor C63C Smoothing capacitor C63A Smoothing capacitor C63B Rotational frequency feedback signal of ...

Page 97: ... M R V coil CN721 230V AC 230V AC Back side of unit SUZ KA25VAH SUZ KA35VAH SUZ KA25VA TH SUZ KA35VA TH SUZ KA25VAH TH SUZ KA35VAH TH Front side of unit Connecting wire with inverter P C board CN726 Refer to 12 5 M 230V AC Varistor NR63 Varistor NR62 Varistor NR64 ...

Page 98: ...temperature thermistor RT64 CN642 Ambient temperature thermistor RT65 CN643 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN641 LEV connector CN724 DB61 DC 260 300 V Front side of unit AC 230 V Smoothing capacitor C62 Output to drive compressor LDU LDV LDW Fuse F701 250 V 3 15 A Smoothing capacitor C61 Smoothing capacitor C63 Fuse F901 250 V 3 15 A R V coil CN721 230 VAC Jump...

Page 99: ... DC pulse wave GND power board CN781 CN795 12V DC pulse wave LEV 20 10 0 10 20 30 40 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 200 180 160 140 120 100 80 60 40 20 0 Resistance k Resistance k Temperature Temperature Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Fin temperature thermistor RT64 0 10 20 30 40 50 60 70 80...

Page 100: ... 50Hz Output CN901 To electronic control P C board F64 FUSE 2A 250V F911 FUSE 1A 250V 12 6 5 Noise filter P C board SUZ KA50VA 1 TH SUZ KA60VA 1 TH SUZ KA60VAR2 TH SUZ KA71VA 1 TH CN902 To power board CN903 To power board 230V AC50Hz Output NR64 VARISTOR ...

Page 101: ...ss signal 3 4 Not used 6 5 15V 7 5 15V Signal reception From electronic control P C board 5V DC pulse wave CN3 Fin temperature thermistor RT64 325 370V DC Output Red White Connect to the compressor Voltage among phases 5V to 180V Connect to the earth CN5 Primary current detection Connect to the noise filter CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board...

Page 102: ...se F901 250 V 3 15 A R V coil CN721 230 VAC LED monitor lamp Output to drive outdoor fan motor CN932 AC 230 V Outdoor heat exchanger temperature thermistor RT68 CN644 Signal of outdoor fan motor CN931 20 10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Temperature Discharge t...

Page 103: ...nnector has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly The terminal which has the locking mechanism can be detached as shown below There are two types Refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the te...

Page 104: ...w fixing the power P C board See Photo 4 10 Disconnect all connectors and lead wires on the power P C board 11 Remove the power P C board from the inverter assembly 4 Removing the discharge temperature thermistor and defrost thermistor 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the power supply and indoor outdoor connecting wire and remove the back panel Refer to 1 3 ...

Page 105: ...4 way valve 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the power supply and indoor outdoor connecting wire and remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa 5 Detach the welded p...

Page 106: ...4 Remove the screws fixing the top panel 5 Remove the top panel 6 Remove the screws fixing the cabinet 7 Remove the cabinet 8 Remove the screws fixing the back panel 9 Remove the back panel Photo 1 Photo 2 Back panel Service panel Screws of the top panel Screws of the cabinet Screws of the top panel Screw of the service panel Direction to remove Screws of the cabinet Hooks Screw of the cabinet H S...

Page 107: ...Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil 3 Remove the R V coil Photo 5 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following con n...

Page 108: ...lve 1 Remove the cabinet and panels Refer to 1 2 Remove the inverter assembly Refer to 2 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa 4 Detach the welded part of the suction and the discharge pipe connected with compressor 5 Remove the nuts of compressor legs 6 Remove the compressor 7 Detach the welded part of pipes connec...

Page 109: ...move the service panel 5 Remove the top panel 6 Remove the valve cover 7 Remove the screws of the cabinet 8 Remove the cabinet 9 Remove the screws of the back panel 10 Remove the back panel Photo 2 Photo 1 Photo 3 Screw of the top panel Screws of the cabinet Screws of the cabinet Screws of the top panel Screws of the cabinet Screw of the service panel Screw of the valve cover Screw of the motor su...

Page 110: ... lead wire to the reactor and the following connectors Inverter P C board CN721 R V coil CN932 Fan motor CN641 Defrost thermistor and discharge temperature ther mistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor CN724 LEV 3 Remove the compressor connector CN61 4 Remove the screws fixing the relay panel Photo 5 5 Remove the inverter assembly Photo 6 6 Re...

Page 111: ... thermistor discharge temper ature thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Refer to 2 4 Pull out the defrost thermistor from its holder Photo 8 5 Pull out the discharge temperature thermistor from its holder Photo 7 6 Pul...

Page 112: ...ded part of the suction and the discharge pipe connected with compressor Photo 11 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the welded part of 4 way valve and pipe Photo 10 OPERATING PROCEDURE PHOTOS Photo 10 7 Removing the reactor 1 Remove the top panel Refer to 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor Photo 12 Screws of th...

Page 113: ...02 127 382 E02 661 385 1 2 3 4 5 6 7 8 9 10 11 12 Symbol in Wiring Diagram Q ty unit DEFROST DISCHARGE 250V 20A 3P 3P Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 250V 3 15A Remarks Part No No Part Name L61 21S4 RT61 RT62 RT65 F61 TB1 TB2 F71 F801 NR62 NR63 NR64 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

Page 114: ...114 1 11 12 2 18 20 13 10 9 SUZ KA25VA TH SUZ KA35VA TH SUZ KA25VAH TH SUZ KA35VAH TH 14 2 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 3 4 5 6 7 8 19 17 23 21 22 24 16 15 14 ...

Page 115: ...1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 Symbol in Wiring Diagram Q ty unit Remarks Part No No Part Name SUZ KA25VA TH SUZ KA35VA TH SUZ KA25VAH TH SUZ KA35VAH TH CABINET GRILLE PROPELLER FAN BASE BASE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET STOP VALVE GAS STOP VALVE LIQUID SERVICE PANEL BACK PANEL EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE C...

Page 116: ...116 SUZ KA50VA TH SUZ KA60VA TH SUZ KA71VA TH 14 3 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 4 19 9 1 13 10 12 2 5 6 7 8 16 14 20 22 23 24 25 29 30 31 3 11 15 17 18 21 28 27 26 ...

Page 117: ...PRESSURE SWITCH COMPRESSOR RUBBER SET COMPRESSOR RUBBER SET COMPRESSOR COMPRESSOR STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID STOP VALVE LIQUID EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE COIL OIL SEPARATOR R V COIL 4 WAY VALVE VALVE COVER SERVICE PANEL OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD TERMINAL BLOCK TERMINAL BLO...

Page 118: ... SUZ KA60 VA TH SUZ KA71 VA TH E02 817 704 E02 444 705 1 2 DRAIN SOCKET DRAIN CAP 33 1 2 1 2 1 2 Outdoor unit 42 drain hole Soft vinyl chloride hose of 25mm inside diameter SUZ KA25VA TH SUZ KA35VA TH 14 4 DRAIN SOCKET Symbol in Wiring Diagram Q ty unit SUZ KA25VA TH SUZ KA35VA TH Remarks Parts No Parts Name E02 838 704 1 DRAIN SOCKET No 1 1 1 ...

Page 119: ... 382 E12 661 385 1 2 3 4 5 6 7 8 9 10 11 12 G G G G G G G G G G G G G G G G Symbol in Wiring Diagram Q ty unit DEFROST DISCHARGE 250V 20A 3P 3P Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 250V 3 15A Remarks Part No No Part Name L61 21S4 RT61 RT62 RT65 F61 TB1 TB2 F71 F801 NR62 NR63 NR64 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

Page 120: ...120 15 2 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 1 11 12 2 18 20 13 10 9 SUZ KA25VA TH SUZ KA35VA TH SUZ KA25VAH TH SUZ KA35VAH TH 3 4 5 6 7 8 19 17 23 21 22 24 16 15 14 ...

Page 121: ... 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 Symbol in Wiring Diagram Q ty unit Remarks Part No No Part Name SUZ KA25VA TH SUZ KA35VA TH SUZ KA25VAH TH SUZ KA35VAH TH CABINET GRILLE PROPELLER FAN BASE BASE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET STOP VALVE GAS STOP VALVE LIQUID SERVICE PANEL BACK PANEL EXPANSIO...

Page 122: ...122 15 3 OUTDOOR UNIT ELECTRICAL PARTS SUZ KA25VAR1 TH SUZ KA35VAR1 TH SUZ KA25VAHR1 TH SUZ KA35VAHR1 TH 10 6 1 2 5 3 7 8 9 4 ...

Page 123: ...STOR RT68 1 1 1 1 5 G E12 C34 490 R V COIL 21S4 1 1 1 1 6 G E12 735 241 FUSE HOLDER 1 1 1 1 7 G E12 735 382 FUSE F61 1 1 1 1 T20AL250V 8 G E12 D69 374 TERMINAL BLOCK TB1 1 1 1 1 3P 9 G E12 D70 374 TERMINAL BLOCK TB2 1 1 1 1 3P 10 G E17 573 451 INVERTER P C BOARD 1 Including heat sink and RT64 G E17 574 451 INVERTER P C BOARD 1 G E12 575 451 INVERTER P C BOARD 1 G E12 576 451 INVERTER P C BOARD 1 1...

Page 124: ...124 1 12 11 2 18 20 13 10 9 3 4 5 6 7 8 19 16 21 22 14 15 17 23 24 15 4 OUTDOOR UNIT UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS SUZ KA25VAR1 TH SUZ KA35VAR1 TH SUZ KA25VAHR1 TH SUZ KA35VAHR1 TH ...

Page 125: ...7 233 BACK PANEL 1 1 1 1 11 G E12 927 640 EXPANSION VALVE 1 1 1 1 12 G E12 927 493 EXPANSION VALVE COIL LEV 1 1 1 1 13 G E12 D65 961 4 WAY VALVE 1 1 1 1 14 G E12 928 079 THERMO HOLDER 1 G E12 930 079 THERMO HOLDER 1 15 G E12 928 525 CONDENSER WIRE NET 1 G E12 930 525 CONDENSER WIRE NET 1 16 G E12 B83 523 CONDENSER NET 1 G E12 929 523 CONDENSER NET 1 17 G E12 928 523 CONDENSER NET 1 G E12 930 523 C...

Page 126: ... SUZ KA71VA TH SUZ KA60VAR2 TH SUZ KA50VA1 TH SUZ KA60VA1 TH SUZ KA71VA1 TH 15 5 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 4 19 9 1 13 10 12 2 5 6 7 8 16 14 20 22 23 24 25 29 30 31 3 11 15 17 18 21 28 27 26 ...

Page 127: ...TOR R V COIL R V COIL 4 WAY VALVE 4 WAY VALVE VALVE COVER SERVICE PANEL OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK REACTOR NOISE FILTER P C...

Page 128: ...128 SUZ KA50VAR2 TH 15 6 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 4 17 1 12 9 11 2 5 6 7 8 15 13 18 27 28 30 3 10 14 16 25 26 22 23 24 19 20 21 29 ...

Page 129: ...2 851 640 EXPANSION VALVE 1 14 G E12 D58 493 EXPANSION VALVE COIL LEV 1 15 G E12 D58 490 R V COIL 21S4 1 16 G E12 C18 961 4 WAY VALVE 1 17 G E12 819 650 VALVE COVER 1 18 G E12 819 245 SERVICE PANEL 1 19 G E12 D58 306 THERMISTOR SET RT61 RT62 1 DEFROST DISCHARGE 20 G E12 D58 309 AMBIENT TEMPERATURE THERMISTOR RT65 1 21 G E12 C34 307 OUTDOOR HEAT EXCHANGER TEMPERATURE THERMISTOR RT68 1 22 G E12 735 ...

Page 130: ... SOCKET Symbol in Wiring Diagram Q ty unit SUZ KA Remarks Parts No Parts Name 25VA TH 25VAR1 TH 25VAH TH 25VAHR1 TH 35VA TH 35VAR1 TH 35VAH TH 35VAHR1 TH E12 838 704 1 G DRAIN SOCKET No 1 1 RoHS 1 HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN cCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Apr 2009 No OC322 REVISED EDITION E PDF 6 Distributed in Nov 2...

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Mitsubishi Electric SUZ-KA25VA, Service Manual

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