Daikin SM-12-012 Service Manual Download

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Service Manual SM-Inverter_(i)

Description

DC voltage out of range

Supposed Cause

Supply voltage not as specified

DC voltage detection circuit defective

Troubleshooting

Description

Communication error (between indoor and outdoor)

Supposed Cause

Faulty outdoor unit PCB

Faulty indoor unit PCB

Indoor unit – outdoor unit signal transmission error due to wiring error.

Indoor unit – outdoor unit signal transmission error due to disturbed power supply
waveform.

Indoor unit- Outdoor unit signal transmission error due to breaking of wire in the
connection wires between the indoor and outdoor units.

Troubleshooting

Check the supply
voltage

Supply voltage as
specified?

Change outdoor
PCB

Correct the
power supply

Summary of Contents for SM-12-012

Page 1: ...Service Manual SM Inverter_ i Air Conditioners Service Manual Split Inverter SM 12 012...

Page 2: ...1B9 High Quality Efficiency Daikin DC Inverter compressor High Performance Daikin Inverter Controller 5 speed Step less Fan operation New Inverter only Remote Control Piping Length Elevation Model Max...

Page 3: ...nction kindly cut off the jumper J_AUTO as highlighted in attachment Please be informed that after disable auto random restart unit is not able to restart with last state memory after power resume fro...

Page 4: ...r using handset The operating modes are Cool Heat Fan Auto Dry Cool Mode When Tr Ts 1 5 C Comp Indoor Fan and Outdoor Fan ON When Tr Ts 2 C Compressor and Outdoor Fan OFF Tr Room Temperature Ts Set Te...

Page 5: ...r cut off point compressor will stop FAN MODE Only High Medium and Low fan speeds are allowed When changing cool mode to fan mode the compressor will stop and OD fan stops based on fan OFF control Com...

Page 6: ...onse to indoor once the valid data is received If the data communication line between indoor and outdoor disrupted for 15s continuously compressor will stop OD fan stop with fan OFF timer ID LED blink...

Page 7: ...overall current protection preheating operation control Heat sink Used for capturing heat sink temperature Suction pipe Used for EXV SH suction pipe SH protection control in heating Gas pipe Used for...

Page 8: ...orator AUTO RESTART Factory pre set Allow unit to automatically resume the same operating mode it was in before a power failure 4 WAY VALVE CONTROL Change over switching is only carried out during ope...

Page 9: ...speed with higher outdoor air temperature Heat mode Higher fan speed with lower outdoor air temperature When compressor stops fan OFF delay 30 seconds is carried out INDOOR COIL FREEZE PREVENTION Only...

Page 10: ...o prevent liquid flood back to the compressor To limit starting current When compressor starts to rotate from OFF to ON compressor rotation is set to run gradually to each upper limit at a specific ti...

Page 11: ...terval LIMIT ROTATION Determine from Upper limit rotation A minimum value was determined among the upper limits rotation i e protection controls Lower limit rotation A maximum value was determined amo...

Page 12: ...ower upper limit is canceled and returned to command rotation HIGH PRESSURE PROTECTION To prevent high pressure in the system Compressor operating frequency is adjusted based on upper limit of coil te...

Page 13: ...he first time this control starts and set the current frequency as upper limit At the same time running frequency start to reduce by 1 step and so on until temperature falls between 99 C 109 C and 90...

Page 14: ...on cut in when the input current exceeds L1 for 2 seconds ARXN RXN LV1B 9 Compressor will stop and it is considered total current overload If input current L3 the compressor frequency is reset based o...

Page 15: ...less Handset BRC52A61 A62 Using wireless handset BRC52A61 A62 to retrieve error code 1 Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds until indication flashes on the handset temperature d...

Page 16: ...controller 2 Replace battery again into remote controller 3 Press Mode ON OFF buttons together 4 The 00 will show at temperature section 5 Press Mode button to 5 00 6 Press Power On toward the indoor...

Page 17: ...M Inverter_ i 17 Using wired handset BRC51A61 A62 The error will show at the LCD display BRC51A61 can retrieved last state memory by Press SLEEP TIMER ACTIVE simultaneously for 5 seconds and the error...

Page 18: ...BNORMAL 6 A7 AIR SWING MOTOR LOCK x 7 C4 INDOOR HEAT EXCHANGER THERMISTOR SHORT OPEN 8 C9 INDOOR ROOM THERMISTOR SHORT OPEN 9 E1 OUTDOOR PCB ERROR x 10 E5 COMPRESSOR OVERLOAD x 11 E6 COMPRESSOR LOCK S...

Page 19: ...T OPEN MISPLACED 22 J6 OUTDOOR HEAT EXCHANGER THERMISTOR SHORT OPEN 23 L3 ELECTRICAL BOX TEMPERATURE RISE compressor off x 24 L4 HEAT SINK OVERHEAT compressor on 25 L5 IPM ERROR IGBT ERROR output over...

Page 20: ...r unit PCB abnormality Supposed Cause 1 Faulty indoor PCB 2 Faulty connector connection at indoor Troubleshooting A3 Description Water Pump Error Supposed Cause 1 Faulty drain pump or float switch 2 I...

Page 21: ...eeze protection or High Pressure Control Supposed Cause 1 Indoor air filter heat exchanger block due to dust accumulation 2 Indoor air short circuit 3 Indoor coil thermistor faulty 4 Indoor PCB faulty...

Page 22: ...Service Manual SM Inverter_ i 22...

Page 23: ...Service Manual SM Inverter_ i 23 A6 Description Fan Motor or Related Abnormality Supposed Cause 1 Indoor fan motor winding short or the motor lead wire broken 2 Indoor PCB faulty Troubleshooting...

Page 24: ...n Indoor Coil Thermistor short open Supposed Cause 1 Thermistor connector faulty 2 Indoor PCB faulty Troubleshooting C9 Description Indoor Room Thermistor Short Open Supposed Cause 1 Thermistor connec...

Page 25: ...s Noise Momentary voltage drop Momentary power failure 2 Damage of EEPROM 3 Faulty outdoor unit PCB Troubleshooting Check the outdoor condition Power on and off again Error Again Replace outdoor PCB N...

Page 26: ...Service Manual SM Inverter_ i 26...

Page 27: ...27 E3 Description High Pressure protection Supposed Cause 1 faulty high pressure switch connector or wire harness 2 Indoor filter outdoor coil dirty 3 Outdoor fan not running unit overcharge stop val...

Page 28: ...i 28 E4 Description Low Pressure protection Supposed Cause 1 faulty high pressure switch connector or wire harness 2 Indoor filter outdoor coil dirty 3 Outdoor fan not running unit overcharge stop val...

Page 29: ...Description Compressor Overload detected through compressor OL Supposed Cause Refrigerant Shortage 4 way valve malfunction Outdoor unit PCB defective Water mixed in the local piping Electronic expans...

Page 30: ...f the power Disconnect the harness U V and W Normal Check with the inverter checker Correct the power supply Turn off the power and reconnect the harness Turn on the power again and get the system res...

Page 31: ...Service Manual SM Inverter_ i 31 E7 Description DC Fan Lock Supposed Cause Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Troubleshooting...

Page 32: ...short circuit Troubleshooting Input current flowing above its stop level Replace the outdoor unit Yes No Yes Turn off the power and disconnect the harness U V and W Check with the inverter checker Me...

Page 33: ...Supposed Cause EXV faulty EXV connected wrongly Troubleshooting EA Description 4 way valve error Supposed Cause Thermistor defective Connector in poor contact 4 way valve defective Outdoor PCB defecti...

Page 34: ...connector Resistance between harness about 3k Reconnect Replace outdoor unit PCB Check the 4 way valve switching output Functioning No Yes No Yes Any thermsistor disconnected Thermistor functioning R...

Page 35: ...or defective Outdoor PCB defective Water mixed in the local piping EXV defective Stop Valve defective Troubleshooting F6 Description Heat exchanger overheat Supposed Cause The installation space is no...

Page 36: ...fan motor Change outdoor location Clean outdoor coil Check outdoor coil thermistor resistance Resistance normal Change thermistor Check refrigerant level EXV stop valve and condenser ambient temperatu...

Page 37: ...rvice Manual SM Inverter_ i 37 HO Description Compressor sensor system error Supposed Cause Reactor disconnection Compressor disconnection Outdoor unit PCB defective Compressor defective Troubleshooti...

Page 38: ...tdoor PCB defective Stop valve closed Input voltage out of specification Troubleshooting No No Yes Yes Check with inverter checker Check for short circuit Normal Check the electrolytic capacitor volta...

Page 39: ...Service Manual SM Inverter_ i 39 H8 Description AC current sensor error Supposed Cause Internal wiring broken Outdoor unit PCB defective Troubleshooting...

Page 40: ...tr short open J5 Suction pipe thermistor short open J6 Outdoor heat exchanger thermistor short open J7 Subcooling heat exchanger thermistor short open J8 Liquid pipe thermistor short open J9 Gas pipe...

Page 41: ...iption Outdoor control box overheat Supposed Cause Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connector in poor contact O...

Page 42: ...temperature rise due to short circuit Fin temperature rise due to defective outdoor unit fan Fin thermistor defective Connector in poor contact Outdoor unit PCB defective Silicon grease is not applie...

Page 43: ...to wrong internal wiring Over current due to abnormal supply voltage Over current due to defective PCB Error detection due to defective PCB Over current due to closed stop valve Over current due to co...

Page 44: ...44 U0 Description Insufficient gas Supposed Cause Refrigerant shortage Refrigerant leakage Stop valve closed EXV defective Discharge pipe thermistor defect Indoor and outdoor unit coil thermistor not...

Page 45: ...Service Manual SM Inverter_ i 45 Troubleshooting...

Page 46: ...lty outdoor unit PCB Faulty indoor unit PCB Indoor unit outdoor unit signal transmission error due to wiring error Indoor unit outdoor unit signal transmission error due to disturbed power supply wave...

Page 47: ...Service Manual SM Inverter_ i 47...

Page 48: ...nication error outdoor PCB IPM PCB Supposed Cause Wrong models interconnected Wrong indoor unit PCB mounted Indoor unit PCB defective Wrong outdoor unit PCB mounted or defective Troubleshooting Check...

Page 49: ...Service Manual SM Inverter_ i 49 ATXN FTXN 25 35 LV1B 9 ARXN RXN 25 35 LV1B 9 4 0 Wiring Connection...

Page 50: ...Service Manual SM Inverter_ i 50 ATXN FTXN 50 60 LV1B 9 ARXN RXN50 60 LV1B 9...

Page 51: ...Service Manual SM Inverter_ i 51 Refrigerant Diagram ATXN FTXN 25 35 50 60 LV1B 9...

Page 52: ...Service Manual SM Inverter_ i 52 ARXN RXN 25 35 50 60 LV1B 9 Appendix Resistance value when 25 C...

Page 53: ...Inverter_ i 53 ARXN RXN50 60 LV1B 9 ARXN RXN 25 35 LV1B 9 Indoor Wall Mounted 10K 10K Ceiling Concealed Ceiling Cassette Ceiling Mounted 10K Outdoor 10K 20K Table 1 Resistance R25 10K ohm Table 2 Resi...

Page 54: ...Service Manual SM Inverter_ i 54 Temperature C Resistance value k 20 211 0 15 150 0 10 116 5 5 88 0 0 67 2 5 51 9 10 40 0 15 31 8 20 25 0 25 20 0 30 16 0 35 13 0 40 10 6 45 8 7 50 7 2...

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