Chigo
Chigo Air Conditioners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E0
Indoor unit displays E0, and the air conditioner will not start or respond to remote commands.
Indoor Unit EEPROM/Memory Communication Fault
E1
Indoor unit shows E1, and the compressor does not start; the fan may still run.
High-Pressure Protection / Refrigerant System Overpressure
E2
Indoor unit displays E2, and cooling stops intermittently; the unit may blow only fan air.
Evaporator Coil Freeze Protection / Anti-freeze Protection
E3
Indoor unit shows E3, and the compressor stops shortly after starting; the outdoor unit may shut down.
Low-Pressure Protection / Refrigerant Undercharge
E4
Indoor unit displays E4, and the unit stops cooling or heating; the compressor may not start.
Compressor Discharge Overheat / High-Temperature Protection
E5
Indoor unit shows E5, and the compressor does not run; sometimes accompanied by outdoor unit clicking.
Overcurrent Protection / Compressor Overload
E6
Indoor unit displays E6, and the system does not start or stops shortly after starting.
Communication Failure Between Indoor and Outdoor Units
E7
Indoor unit shows E7, and the outdoor unit does not respond; no compressor or fan operation.
Mode Conflict / Indoor-Outdoor Mismatch or Reversed Wiring
E8
Indoor unit displays E8 and stops cooling; the fan may continue to run.
Indoor Fan Motor Fault / Overload Protection
E9
Indoor unit shows E9 and may shut down; it is sometimes accompanied by water leakage from the indoor unit.
Full Drain Pan / Water Level Protection (if equipped) or EEPROM Error (model-dependent)
F0
Indoor unit displays F0, and cooling performance is poor or intermittent.
Indoor Ambient Temperature Sensor Fault
F1
Indoor unit shows F1, and the unit may run erratically, not reaching the set temperature.
Indoor Evaporator Coil Temperature Sensor Fault
F2
Indoor unit displays F2 and may stop cooling or show abnormal defrost behavior in heat mode.
Outdoor Ambient Temperature Sensor Fault
F3
Indoor unit shows F3, and heating or cooling cycles are unstable; defrost may not work correctly.
Outdoor Condenser Coil Temperature Sensor Fault
F4
Indoor unit displays F4, and compressor operation is inhibited or intermittent.
Compressor Discharge Temperature Sensor Fault
F5
Indoor unit shows F5, and the outdoor fan may not operate correctly; the system may overheat or shut down.
Outdoor Fan Motor Feedback / Speed Sensor Fault
F6
Indoor unit displays F6 and compressor operation is limited; unit may not reach set temperature.
Compressor Current / IPM Module Protection (Inverter Models)
F7
Indoor unit shows F7 and the system may not start or may shut down unexpectedly.
Phase Loss / Phase Sequence Error (Three-Phase Models)
F8
Indoor unit displays F8 and compressor speed is limited; poor cooling or heating.
Inverter Module Overheat / Heatsink Temperature Protection
F9
Indoor unit shows F9 and unit may not respond correctly to set temperature; erratic operation.
Indoor Humidity or Secondary Sensor Fault (model-dependent)
H1
Indoor unit displays H1 and heating is delayed; outdoor unit may be in defrost mode.
Defrost Operation Indicator / Defrost Mode
H3
Indoor unit shows H3 and compressor stops; system shuts down to protect itself.
Compressor Overload Protection (Thermal Trip)
H4
Indoor unit displays H4 and the system may not start; sometimes after a power interruption.
EEPROM / Memory Error on Indoor PCB
H5
Indoor unit shows H5 and the outdoor unit does not start.
IPM (Inverter Power Module) Protection / Malfunction
H6
Indoor unit displays H6 and the indoor fan does not run or runs erratically.
Indoor Fan Motor Hall Sensor / Feedback Fault
P0
Indoor unit shows P0 and the compressor does not start or runs at limited capacity.
DC Bus Voltage Protection (Too High or Too Low)
P1
Indoor unit displays P1, and the system may shut down during operation.
Low Voltage Protection
P2
Indoor unit shows P2, and compressor operation is restricted; the unit may stop.
High Temperature Protection of Compressor or IPM
P4
Indoor unit displays P4, and the unit may not start or may shut down quickly.
Inverter Compressor Drive Fault / Phase Error
Symptom
A strong musty or moldy smell from the indoor Chigo air conditioner when it starts.
Odor / Biological Growth in Indoor Unit
Symptom
Chigo air conditioner frequently turns on and off (short cycling) without reaching the set temperature.
Short Cycling / Control or Capacity Issue
Symptom
Frost or ice is forming on the indoor evaporator coil or suction line of the Chigo unit.
Evaporator Icing / Freeze-Up
Symptom
Loud humming, grinding, or metallic noise from the outdoor Chigo condenser unit.
Outdoor Mechanical Noise / Fan or Compressor Fault
Symptom
Loud rattling or buzzing noise from the indoor Chigo unit during operation.
Indoor Mechanical Noise / Vibration
Symptom
The Chigo air conditioner does not heat in Heat mode; it blows only cool or lukewarm air.
No Heating / Heat Pump Fault
Symptom
The Chigo air conditioner emits a burning smell or visible smoke.
Overheating / Electrical Burning
Symptom
The Chigo air conditioner trips the circuit breaker immediately or shortly after starting.
Breaker Tripping / Overcurrent or Short Circuit
Symptom
The display on the indoor Chigo unit is flashing or segments are missing; the unit may still operate.
Display Board / LED Panel Fault
Symptom
The indoor unit does not power on at all; there are no lights or display on the Chigo air conditioner.
No Power / Dead Indoor Unit
Symptom
The indoor unit is running but provides no cooling; air from the vents is not cold even after 15–20 minutes.
Insufficient Cooling / Underperformance
Symptom
The indoor unit runs, but airflow is very weak even on high fan speed.
Low Airflow / Indoor Fan Performance Issue
Symptom
The outdoor unit coil is heavily iced over in heating mode, resulting in poor heating performance.
Outdoor Coil Icing / Defrost Failure
Symptom
The outdoor unit is not running while the indoor fan blows air; there is no cooling or heating.
Outdoor Unit Non-Operation
Symptom
The remote control does not operate the Chigo indoor unit; there is no response to button presses.
Remote Control / IR Receiver Failure
Symptom
Water is leaking from the front or bottom of the indoor Chigo wall-mounted unit.
Indoor Water Leakage / Condensate Drain Blockage
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E0 |
Indoor unit displays E0, and the air conditioner will not start or respond to remote commands.
|
Indoor Unit EEPROM/Memory Communication Fault | View Details |
| E1 |
Indoor unit shows E1, and the compressor does not start; the fan may still run.
|
High-Pressure Protection / Refrigerant System Overpressure | View Details |
| E2 |
Indoor unit displays E2, and cooling stops intermittently; the unit may blow only fan air.
|
Evaporator Coil Freeze Protection / Anti-freeze Protection | View Details |
| E3 |
Indoor unit shows E3, and the compressor stops shortly after starting; the outdoor unit may shut down.
|
Low-Pressure Protection / Refrigerant Undercharge | View Details |
| E4 |
Indoor unit displays E4, and the unit stops cooling or heating; the compressor may not start.
|
Compressor Discharge Overheat / High-Temperature Protection | View Details |
| E5 |
Indoor unit shows E5, and the compressor does not run; sometimes accompanied by outdoor unit clicking.
|
Overcurrent Protection / Compressor Overload | View Details |
| E6 |
Indoor unit displays E6, and the system does not start or stops shortly after starting.
|
Communication Failure Between Indoor and Outdoor Units | View Details |
| E7 |
Indoor unit shows E7, and the outdoor unit does not respond; no compressor or fan operation.
|
Mode Conflict / Indoor-Outdoor Mismatch or Reversed Wiring | View Details |
| E8 |
Indoor unit displays E8 and stops cooling; the fan may continue to run.
|
Indoor Fan Motor Fault / Overload Protection | View Details |
| E9 |
Indoor unit shows E9 and may shut down; it is sometimes accompanied by water leakage from the indoor unit.
|
Full Drain Pan / Water Level Protection (if equipped) or EEPROM Error (model-dependent) | View Details |
| F0 |
Indoor unit displays F0, and cooling performance is poor or intermittent.
|
Indoor Ambient Temperature Sensor Fault | View Details |
| F1 |
Indoor unit shows F1, and the unit may run erratically, not reaching the set temperature.
|
Indoor Evaporator Coil Temperature Sensor Fault | View Details |
| F2 |
Indoor unit displays F2 and may stop cooling or show abnormal defrost behavior in heat mode.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| F3 |
Indoor unit shows F3, and heating or cooling cycles are unstable; defrost may not work correctly.
|
Outdoor Condenser Coil Temperature Sensor Fault | View Details |
| F4 |
Indoor unit displays F4, and compressor operation is inhibited or intermittent.
|
Compressor Discharge Temperature Sensor Fault | View Details |
| F5 |
Indoor unit shows F5, and the outdoor fan may not operate correctly; the system may overheat or shut down.
|
Outdoor Fan Motor Feedback / Speed Sensor Fault | View Details |
| F6 |
Indoor unit displays F6 and compressor operation is limited; unit may not reach set temperature.
|
Compressor Current / IPM Module Protection (Inverter Models) | View Details |
| F7 |
Indoor unit shows F7 and the system may not start or may shut down unexpectedly.
|
Phase Loss / Phase Sequence Error (Three-Phase Models) | View Details |
| F8 |
Indoor unit displays F8 and compressor speed is limited; poor cooling or heating.
|
Inverter Module Overheat / Heatsink Temperature Protection | View Details |
| F9 |
Indoor unit shows F9 and unit may not respond correctly to set temperature; erratic operation.
|
Indoor Humidity or Secondary Sensor Fault (model-dependent) | View Details |
| H1 |
Indoor unit displays H1 and heating is delayed; outdoor unit may be in defrost mode.
|
Defrost Operation Indicator / Defrost Mode | View Details |
| H3 |
Indoor unit shows H3 and compressor stops; system shuts down to protect itself.
|
Compressor Overload Protection (Thermal Trip) | View Details |
| H4 |
Indoor unit displays H4 and the system may not start; sometimes after a power interruption.
|
EEPROM / Memory Error on Indoor PCB | View Details |
| H5 |
Indoor unit shows H5 and the outdoor unit does not start.
|
IPM (Inverter Power Module) Protection / Malfunction | View Details |
| H6 |
Indoor unit displays H6 and the indoor fan does not run or runs erratically.
|
Indoor Fan Motor Hall Sensor / Feedback Fault | View Details |
| P0 |
Indoor unit shows P0 and the compressor does not start or runs at limited capacity.
|
DC Bus Voltage Protection (Too High or Too Low) | View Details |
| P1 |
Indoor unit displays P1, and the system may shut down during operation.
|
Low Voltage Protection | View Details |
| P2 |
Indoor unit shows P2, and compressor operation is restricted; the unit may stop.
|
High Temperature Protection of Compressor or IPM | View Details |
| P4 |
Indoor unit displays P4, and the unit may not start or may shut down quickly.
|
Inverter Compressor Drive Fault / Phase Error | View Details |
| – |
A strong musty or moldy smell from the indoor Chigo air conditioner when it starts.
|
Odor / Biological Growth in Indoor Unit | View Details |
| – |
Chigo air conditioner frequently turns on and off (short cycling) without reaching the set temperature.
|
Short Cycling / Control or Capacity Issue | View Details |
| – |
Frost or ice is forming on the indoor evaporator coil or suction line of the Chigo unit.
|
Evaporator Icing / Freeze-Up | View Details |
| – |
Loud humming, grinding, or metallic noise from the outdoor Chigo condenser unit.
|
Outdoor Mechanical Noise / Fan or Compressor Fault | View Details |
| – |
Loud rattling or buzzing noise from the indoor Chigo unit during operation.
|
Indoor Mechanical Noise / Vibration | View Details |
| – |
The Chigo air conditioner does not heat in Heat mode; it blows only cool or lukewarm air.
|
No Heating / Heat Pump Fault | View Details |
| – |
The Chigo air conditioner emits a burning smell or visible smoke.
|
Overheating / Electrical Burning | View Details |
| – |
The Chigo air conditioner trips the circuit breaker immediately or shortly after starting.
|
Breaker Tripping / Overcurrent or Short Circuit | View Details |
| – |
The display on the indoor Chigo unit is flashing or segments are missing; the unit may still operate.
|
Display Board / LED Panel Fault | View Details |
| – |
The indoor unit does not power on at all; there are no lights or display on the Chigo air conditioner.
|
No Power / Dead Indoor Unit | View Details |
| – |
The indoor unit is running but provides no cooling; air from the vents is not cold even after 15–20 minutes.
|
Insufficient Cooling / Underperformance | View Details |
| – |
The indoor unit runs, but airflow is very weak even on high fan speed.
|
Low Airflow / Indoor Fan Performance Issue | View Details |
| – |
The outdoor unit coil is heavily iced over in heating mode, resulting in poor heating performance.
|
Outdoor Coil Icing / Defrost Failure | View Details |
| – |
The outdoor unit is not running while the indoor fan blows air; there is no cooling or heating.
|
Outdoor Unit Non-Operation | View Details |
| – |
The remote control does not operate the Chigo indoor unit; there is no response to button presses.
|
Remote Control / IR Receiver Failure | View Details |
| – |
Water is leaking from the front or bottom of the indoor Chigo wall-mounted unit.
|
Indoor Water Leakage / Condensate Drain Blockage | View Details |
No matching codes found
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