Koppel Aircon Error Codes
Koppel Error Codes
Koppel air conditioner error codes and probable causes, organized by product series.
Window Type
Viva Series
KWR-06R6A | KWR-07R6A
| Display | Failure |
|---|---|
| E1 | Failure of Room Temperature Sensor |
| E2 | Failure of Indoor Coil Pipe Temperature Sensor |
EVO Series
KWR-06R4A2 | KWR-07R4A2
| Display | Failure |
|---|---|
| E1 | Failure of Room Temperature Sensor |
| E2 | Failure of Indoor Coil Pipe Temperature Sensor |
Aera Window Type
Aera Window Type
| Display | Failure |
|---|---|
| E0 | Indoor unit EEPROM parameter error |
| AS | Room temperature sensor T1 is open circuit or has short circuited |
| LO | Room temperature sensor T1 is open circuit in fan-only mode |
| HI | Room temperature sensor T1 has short circuit in fan-only mode |
| HS | Electric heating sensor T5/T6 is open circuit or has short circuited |
| oS | Outdoor room temperature sensor T4 is open circuit or has short circuited |
| CS | Condenser coil temperature sensor T3 is open circuit or has short circuited |
| ES/• | Evaporator temperature sensor T2 is open circuit or has short circuited |
Super Inverter Window Type
KV09WR-ARF31 | KV12WR-ARF31
| Display | Failure |
|---|---|
| E0 | Indoor electric EEPROM error |
| E1 | Indoor and outdoor communication error |
| E3 | Indoor fan motor speed out of control |
| E4 | Room temperature sensor error |
| E5 | Evaporator temperature sensor error |
| EC | Refrigerant leakage detection |
| F0 | Current overload protection |
| F1 | Outdoor temperature sensor error |
| F2 | Condenser temperature sensor error |
| F3 | Exhaust temperature sensor error |
| F4 | Outdoor electric EEPROM error |
| P0 | IPM module error |
| P1 | Voltage too high/too low protection |
| P2 | Protection of IPM high temperature |
| P4 | Protection of compressor location |
| P7 | Outdoor IGBT sensor error |
Full DC Inverter Window Type
KV09WR-ARF31A | KV12WR-ARF31A
| Display | Failure |
|---|---|
| EH00 | Display board EEPROM parameter error |
| EH03 | Indoor fan speed is operating outside the normal range |
| EC51 | Main control board EEPROM parameter error |
| EC52 | Condenser coil temperature sensor T3 is open circuit or short circuited |
| EC53 | Outdoor room temperature sensor T4 is open circuit or short circuited |
| EC54 | Compressor discharge temperature sensor TP is open circuit or short circuited |
| EH60 | Room temperature sensor T1 is open circuit or short circuited |
| EH61 | Evaporator temperature sensor T2 is open circuit or short circuited |
| EC07 | Outdoor fan speed is operating outside the normal range |
| EH0b | Communication malfunction between main control board and display board |
| EL0C | Refrigerant leakage detection |
| PC00 | IPM malfunction or IGBT over-strong current protection |
| PC01 | Over voltage or over low voltage protection |
| PC02 | High temperature protection of IPM module |
| PC04 | Inverter compressor drive error |
Full DC Inverter Window Type
KV18WR-ARF31A | KV24WR-ARF31A
| Display | Failure |
|---|---|
| E0 | Indoor EEPROM malfunction |
| E1 | Communication malfunction between indoor and outdoor units |
| E3 | Indoor fan speed is operating outside the normal range |
| E4 | Indoor room temperature sensor T1 is open circuit or short circuited |
| E5 | Evaporator coil middle temperature sensor T2 is open circuit or short circuited |
| EC | Refrigerant leakage detection |
| F0 | Current overload protection |
| F1 | Outdoor room temperature sensor T4 is open circuit or short circuited |
| F2 | Condenser coil temperature sensor T3 is open circuit or short circuited |
| F3 | Compressor discharge temperature sensor TP is open circuit or short circuited |
| F4 | Outdoor EEPROM malfunction |
| P0 | IPM malfunction or IGBT over-strong current protection |
| P1 | Over voltage or over low voltage protection |
| P2 | High temperature protection of IPM module |
| P4 | Inverter compressor drive error |
Super Inverter DC Pro Window Type
0.75 HP / 1.0 HP / 1.5 HP
| Display | Failure |
|---|---|
| EH00 | Display board EEPROM parameter error |
| EH03 | Indoor fan speed is operating outside the normal range |
| EC51 | Main control board EEPROM parameter error |
| EC52 | Condenser coil temperature sensor T3 is open circuit or short circuited |
| EC53 | Outdoor room temperature sensor T4 is open circuit or short circuited |
| EC54 | Compressor discharge temperature sensor T5 is open circuit or short circuited |
| EH60 | Room temperature sensor T1 is open circuit or short circuited |
| EH61 | Evaporator temperature sensor T2 is open circuit or short circuited |
| EC07 | Outdoor fan speed is operating outside the normal range |
| EH0b | Communication malfunction between main control board and display board |
| EL0C | Refrigerant leakage detection |
| PC00 | IPM malfunction or IGBT over-strong current protection |
| PC01 | Over voltage or over low voltage protection |
| PC02 | High temperature protection of IPM module |
| PC04 | Inverter compressor drive error |
| PC06 | Temperature protection of compressor discharge |
| PH91 | Low temperature protection of evaporator |
| PC0A | High temperature protection of condenser |
Split Wall Mounted - Non-Inverter
Basic Wall Mounted - R1, R2, R3, R4 Series (2.5HP)
| Failure phenomenon | Operation lamp | Timer lamp | Defrosting lamp | Auto lamp |
|---|---|---|---|---|
| Over current protection of the compressor occurs 4 times | Flash 5Hz | Flash 5Hz | Flash 5Hz | Flash 5Hz |
| Indoor room temp. sensor is open circuit or short circuit | Off | Flash 5Hz | Off | Off |
| Temp. sensor on indoor evaporator is open circuit or short circuit | Flash 5Hz | Off | Off | Off |
| Temp. sensor on outdoor condenser is open circuit or short circuit (without for cooling only models) | Off | Off | Flash 5Hz | Off |
| Outdoor unit protects (outdoor temp sensor, phase order etc.) | Off | Off | Flash 5Hz | Flash 5Hz |
| EEROM error | Off | Flash 5Hz | Off | Flash 5Hz |
| Indoor unit communication err | Off | Off | Off | Flash 5Hz |
Lamp key: Off = extinguished; Flash 5Hz = flashing at 5Hz. For cool-only models the defrosting lamp is replaced with a fan lamp, but the malfunction display remains.
Basic Wall Mounted - H Series, ERA Series & Low Profile
KSW-09R5B/KPC-09HH5B/(CA)/CF | KSW-12R5B/KPC-12HH5B/(CA)/CF | KSW-18R5/KPC-12HH5/(CA)/CF (as printed on slide) | KSW-24R5B/KPC-24HH5B/(CA)/CF
| LED display | Failure | Running light flash |
|---|---|---|
| E1 | RT Sensor Error | Blinks once, then repeats |
| E2 | Indoor Coil Sensor Error | Blinks twice, then repeats |
| E6 | Indoor Fan Motor Failure | Blinks six times, then repeats |
Basic Wall Mounted - Viva Series
KSW-09R5DA/KPC-09HH5DA | KSW-12R5DA/KPC-12HH5DA | KSW-18R5DA/KPC-18HH5DA | KSW-24R5DA/KPC-24HH5DA
| Display LED | Type of failure | Lamp flash |
|---|---|---|
| E1 | The failure of room temperature sensor | Once / cycle |
| E2 | The failure of indoor coil pipe temperature sensor | Twice / cycle |
| E4 | System abnormity | 4 times / cycle |
| E5 | The failure of outdoor pressure switch, relative wiring or circuit | 5 times / cycle |
| E6 | The failure of indoor fan motor | 6 times / cycle |
Wall Mounted Inverter - Indoor Error Codes
| Display | Failure |
|---|---|
| EH00 | Indoor unit EEPROM parameter error |
| EL01 | Indoor/outdoor unit communication error (for some models) |
| EH02 | Zero-crossing signal detection error |
| EH03 | Indoor fan speed is operating outside the normal range |
| EH60 | Indoor room temperature sensor T1 is open circuit or short circuited |
| EH61 | Evaporator coil temperature sensor T2 is open circuit or short circuited |
| EH0b | Communication error between display board and main board |
| EL0C | Refrigerant leak detected |
| EC52 | Condenser coil temperature sensor T3 or outdoor room temperature sensor T4 is open circuit or short circuited |
| EC07 | Outdoor fan speed is operating outside the normal range |
| PC03 | High pressure protection (for some models) |
Wall Mounted Inverter C Series - Indoor and Outdoor Error Codes
| Display | Failure |
|---|---|
| E0 | Indoor unit EEPROM parameter error |
| E1 | Indoor/outdoor units communication error |
| E2 | Zero-crossing signal error |
| E3 | Indoor fan speed has been out of control |
| E4 | Indoor room temperature sensor T1 open circuit or short circuit |
| E5 | Evaporator coil temperature sensor T2 open circuit or short circuit |
| EC | Refrigerant leakage detection |
| F0 | Overload current protection |
| F1 | Outdoor ambient temperature sensor T4 open circuit or short circuit |
| F2 | Condenser coil temperature sensor T3 open circuit or short circuit |
| F3 | Compressor discharge temperature sensor T5 open circuit or short circuit |
| F4 | Outdoor unit EEPROM parameter error |
| P0 | IPM malfunction or IGBT over-strong current protection |
| P1 | Over voltage or over low voltage protection |
| P2 | High temperature protection of IPM module |
| P4 | Inverter compressor drive error |
Split Wall Mounted - Inverter
Wall Mounted - Inverter Residential 1st & B Series - Indoor unit codes
| Operation lamp | Timer lamp | Display | LED status |
|---|---|---|---|
| Flash 1 time | Off | E0 | Indoor unit EEPROM parameter error |
| Flash 2 times | Off | E1 | Indoor / outdoor units communication error |
| Flash 3 times | Off | E2 | Zero-crossing signal error |
| Flash 4 times | Off | E3 | Indoor fan speed has been out of control |
| Flash 5 times | Off | E4 | Open circuit or short circuit of indoor room temperature T1 sensor |
| Flash 6 times | Off | E5 | Open circuit or short circuit of evaporator coil temperature T2 sensor |
| Flash 7 times | Off | EC | Refrigerant Leakage Detection |
Lamp key: Light = on; Off = off; Flash = flash at 4Hz, stop 4s.
Wall Mounted - Inverter Residential 1st & B Series - Outdoor unit codes
| Operation lamp | Timer lamp | Display | LED status |
|---|---|---|---|
| Flash 1 time | Light | F0 | Over current protection |
| Flash 2 times | Light | F1 | Open circuit or short circuit of outdoor ambient T4 temperature sensor |
| Flash 3 times | Light | F2 | Open circuit or short circuit of condenser coil temperature T3 sensor |
| Flash 4 times | Light | F3 | Open circuit or short circuit of compressor discharge T5 temperature sensor |
| Flash 5 times | Light | F4 | Outdoor unit EEPROM parameter error |
| Flash 1 time | Flash | P0 | IPM malfunction or IGBT over-strong current protection |
| Flash 2 times | Flash | P1 | Over voltage or over low voltage protection |
| Flash 3 times | Flash | P2 | High temperature protection of compressor top |
| Flash 5 times | Flash | P4 | Inverter compressor drive error |
Lamp key: Light = on; Off = off; Flash = flash at 4Hz, stop 4s.
Light Commercial Products - Floor Mounted
Floor Mounted - E0 Series
| Error code | Meaning | Remark |
|---|---|---|
| F | Room sensor fails (short / open circuit) | Slide shows a display glyph next to this code - verify on slide 46 |
| FE | Freeze sensor fails (short / open circuit) | |
| F | There is freeze at the indoor coil | Slide shows a display glyph next to this code - verify on slide 46 |
| LC | Lock control panel |
Light Commercial Products - Non-Inverter
Basic & Chilled Water Ceiling Mounted - R1 Series (Micontech KCM-xxR1)
KCM-xxR1
| Indicator | Possible cause |
|---|---|
| Cooling mode: all lights blinking | Air & coil thermistor is open or short circuit |
| Cooling mode: all lights blinking | Dirty air filter |
| Cooling mode: all lights blinking | Icing on evaporator |
Basic Ceiling / Floor Mounted - Indoor Display Error Codes
KCM-36R3
| No. | Type | Contents | LED flashing | Remark |
|---|---|---|---|---|
| 1 | Normal | Standing-by | Operation lamp flashes at 0.5Hz | Nothing wrong with the unit when LED indicate these contents |
| 2 | Normal | System Off | All lamps are off | |
| 3 | Normal | System startup | Operation lamp on | |
| 4 | Normal | Forced cooling | Operation lamp flashes at 5Hz, Timer lamp on | |
| 5 | Protection | Outdoor unit malfunction | All lamps flashing at 5Hz | Recover automatically after errors are eliminated (for T3 malfunction of 5HP, can't recover automatically) |
| 6 | Error | Room temperature sensor checking channel is abnormal | Timer lamp flashing at 5Hz | |
| 7 | Error | Evaporator sensor checking channel is abnormal | Operation lamp flashing at 5Hz | |
| 8 | Error | Condenser sensor checking channel is abnormal | Defrosting lamp flashing at 5Hz | |
| 9 | Error | Communication of EEPROM malfunction | Operation lamp and timer lamp flashing at 5Hz | |
| 10 | Error | Water level alarm / pump sensor malfunction | Alarm lamp flashes at 5Hz |
T3: outdoor condenser temperature sensor. T4: outdoor ambient temperature sensor.
Basic Ceiling / Floor Mounted - Outdoor PCB LED Error Display
KPC60-JH1 (ceiling / floor mounted) | KPC36-JH3 (ceiling cassette)
| Error | LED1 | LED2 | LED3 |
|---|---|---|---|
| Phase sequence | Flash | Off | Off |
| Lack of phase (A,B) | Flash | Off | Off |
| Lack of phase (C) | Off | Off | Off |
| Protection of low pressure | Flash | Flash | Off |
| Overload of current | Off | Off | Flash |
| Communication malfunction | Flash | Off | Flash |
| Open-circuit and short-circuit trouble of T3 | Off | Flash | Flash |
| Open-circuit and short-circuit trouble of T4 | Off | Flash | Off |
| High temperature protection of condenser | Flash | Flash | Flash |
If LED1-LED3 are flashing slowly, the system is in stand-by. T3: outdoor condenser temperature sensor. T4: outdoor ambient temperature sensor.
Basic Ceiling Cassette - R2 Series - Indoor Display Error Codes
KCA-24R2 | KCA-36R2
| No. | Fault | Indoor LED indicator |
|---|---|---|
| 1 | Power source fault | RUN lamp flash 1 time, and ALARM lamp illuminates |
| 2 | Communication of wire controller fault | RUN lamp flash 2 time, and ALARM lamp illuminates |
| 3 | Communication of outdoor unit fault | RUN lamp flash 2 time, and ALARM lamp illuminates |
| 4 | Room temp. sensor error | RUN lamp flash 3 time, and ALARM lamp illuminates |
| 5 | Evaporator temp. sensor error | RUN lamp flash 4 time, and ALARM lamp illuminates |
| 6 | Condenser temp. sensor error | RUN lamp flash 6 time, and ALARM lamp illuminates |
| 7 | Outdoor unit protection alarm | RUN lamp flash 7 time, and ALARM lamp illuminates |
| 8 | Compressor high pressure / overload protection alarm | RUN lamp flash 8 time, and ALARM lamp illuminates |
| 9 | Compressor low pressure protection alarm | RUN lamp flash 9 time, and ALARM lamp illuminates |
| 10 | Condenser water level switch alarm | RUN lamp flash 10 time, and ALARM lamp illuminates |
| 11 | Evaporator coil anti-freeze protection (in cooling mode) | RUN lamp flash 12 time, and ALARM lamp illuminates |
| 12 | Evaporator coil high temperature (in heat mode) | RUN lamp flash 12 time, and ALARM lamp illuminates |
| 13 | Condenser coil high temperature | RUN lamp flash 13 time, and ALARM lamp illuminates |
| 14 | Unit running failure | RUN lamp flash 15 time, and ALARM lamp illuminates |
| 15 | Indication to clean filter | TIMER lamp flashes 3 times, and DEFROSTING/PREHEATING lamp illuminates |
| 16 | Crankcase heater is activated | TIMER lamp flashes 4 times, and DEFROSTING/PREHEATING lamp illuminates |
Basic Ceiling Cassette - R2 Series - Outdoor PCB Fault Indicator
KCA-24R2 | KCA-36R2
| No. | Fault | Outdoor fault indicator alarm |
|---|---|---|
| 1 | Power source fault | Flashes 1 time |
| 2 | Evaporator temp. sensor error | Flashes 4 times |
| 3 | Compressor overload protection | Flashes 5 times |
| 4 | Compressor high pressure protection | Flashes 6 times |
| 5 | Compressor low pressure protection | Flashes 7 times |
| 6 | Compressor outdoor protection alarm | Flashes 8 times |
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