An error code is a way for an HVAC system (like a mini-split or central unit) to communicate that something isn’t working properly.
Instead of just shutting down with no explanation, the system will flash a specific code — usually letters and numbers — on a display or indicator light.
Each error code points to a specific issue, like:
Electrical problems
Sensor malfunctions
Communication failures between components
Refrigerant pressure issues
Motor faults
Temperature problems
Code | Issue |
|---|---|
EH-00/EH-0A | Indoor unit EEPROM parameter error |
EL-01 | Indoor / outdoor unit communication error |
EH-bA | Communication error between indoor unit and indoor external fan module |
EH-30 | Parameters error of indoor external fan |
EH-31 | Upper indoor fan speed is operating outside of the normal range(for new console type) |
EH-32 | Lower indoor fan speed is operating outside of the normal range(for new console type) |
EH-35 | Phase failure of indoor external fan |
EH-36 | Indoor external fan current sampling bias fault |
EH-37 | Indoor external fan zero speed failure |
EH-38 | Indoor external fan stall failure |
EH-39 | Out of step failure of indoor external fan |
EH-3A | Low voltage protection of indoor external fan DC bus |
EH-3b | Indoor external fan DC bus voltage is too high fault |
EH-3E | Indoor external fan overcurrent fault |
EH-3F | Indoor external fan module protection/hardware overcurrent protection |
EH-03 | The indoor fan speed is operating outside of the normal range |
EC-51 | Outdoor unit EEPROM parameter error |
EC-52 | Condenser coil temperature sensor T3 is in open circuit or has short circuited |
EC-53 | Outdoor room temperature sensor T4 is in open circuit or has short circuited |
EC-54 | Compressor discharge temperature sensor TP is in open circuit or has short circuited |
EC-55 | IGBT temperature sensor TH is in open circuit or has short circuited |
EC-0d | Outdoor unit malfunction |
EH-60 | Indoor room temperature sensor T1 is in open circuit or has short circuited |
EH-61 | Evaporator coil temperature sensor T2 is in open circuit or has short circuited |
EC-71 | Outdoor external fan overcurrent fault |
EC-75 | Outdoor external fan module protection/hardware overcurrent protection |
EC-72 | Outdoor external fan phase failure |
EC-74 | Outdoor external fan current sampling bias fault |
EC-73 | Zero speed failure of outdoor unit DC fan |
EC-07 | The outdoor fan speed is operating outside of the normal range( |
EH-b5 | Intelligent eye communication failure |
EL-0C | Refrigerant leak detected |
EH-0b | Communication error between indoor two chips |
EH-0b | Communication error between display board and main board(for new console type) |
EH-0E | Water-level alarm malfunction |
EH-0F | Intelligent eye malfunction |
FH-07 | Communication malfunction between indoor unit and auto-lifting panel |
PC-00 | IPM malfunction or IGBT over-strong current protection |
PC-10 | Over low voltage protection |
PC-11 | Over voltage protection |
PC-12 | DC voltage protection |
PC-02 | Top temperature protection of compressor or High temperature protection of IPM module |
PC-40 | Communication error between outdoor main chip and compressor driven chip |
PC-41 | Current Input detection protection |
PC-42 | Compressor start error |
PC-43 | Lack of phase (3 phase) protection |
PC-44 | Outdoor unit zero speed protection |
PC-45 | 341PWM error |
PC-46 | Compressor speed malfunction |
PC-49 | Compressor over current protection |
PC-06 | Compressor discharge temperature protection |
PC-08 | Outdoor current protection |
PH-09 | Anti-cold air in heating mode |
PC-0F | PFC module malfunction |
PC-30 | System overpressure protection |
PC-31 | System pressure is too low protection |
PC-03 | Pressure protection |
PC-0L | Outdoor low ambient temperature protection |
PH-90 | Evaporator coil temperature over high protection |
PH-91 | Evaporator coil temperature over low Protection |
PC-0A | Condenser high temperature protection |
PH-0C | Indoor unit humidity sensor failure |
LH-00 | Frequency limit caused by T2 |
LH-30 | Indoor external fan current limit |
LH-31 | Indoor external fan voltage limit |
LC-01 | Frequency limit caused by T3 |
LC-02 | Frequency limit caused by TP |
LC-05 | Frequency limit caused by voltage |
LC-03 | Frequency limit caused by current |
LC-06 | Frequency limit caused by PFC |
LC-30 | Frequency limit caused by high pressure |
LC-31 | Frequency limit caused by low pressure |
LH-07 | Frequency limit caused by remote controller |
| - - | Indoor units mode conflict(match with multi outdoor unit) |
nA | No malfunction and protection |
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