HVAC Toolkit

Gree Error Codes

Complete fault code reference for Gree mini-splits and air conditioners

Quick Reference: E = Main errors | F = Sensor faults | H = Hardware | C = Compressor | P = Protection

E-Series (Main Error Codes)

Code Description Possible Cause Solution
E0 EEPROM error Memory chip failure Replace PCB
E1 High pressure protection High head pressure, dirty coil, overcharge Clean condenser, check charge, verify fan
E2 Anti-freezing protection Evaporator coil freezing Check filter, airflow, refrigerant charge
E3 Low pressure protection Low refrigerant charge or restriction Find leak, repair, recharge system
E4 Compressor discharge temperature protection Compressor overheating Check superheat, charge, ambient conditions
E5 Compressor overcurrent protection High amp draw Check voltage, charge, compressor condition
E6 Communication error No communication between units Check communication wiring between indoor/outdoor
E7 Mode conflict Multi-split system mode conflict Set all indoor units to same mode
E8 Anti-high temperature protection Indoor coil overtemperature Check airflow, fan operation
E9 Anti-cold air protection Cold air protection in heating mode Normal operation - wait for coil to warm up

F-Series (Sensor Faults)

Code Description Possible Cause Solution
F0 Refrigerant leakage Low charge detected by system Find leak, repair, and recharge
F1 Indoor ambient temperature sensor fault Room thermistor open/short Check and replace room sensor
F2 Indoor coil temperature sensor fault Evaporator thermistor open/short Check and replace coil sensor
F3 Outdoor ambient temperature sensor fault Outdoor ambient thermistor failure Check and replace ambient sensor
F4 Outdoor coil temperature sensor fault Condenser thermistor failure Check and replace outdoor coil sensor
F5 Compressor discharge temperature sensor fault Discharge thermistor failure Check and replace discharge sensor
F6 AC current sensor overcurrent Current transformer fault Check CT sensor, replace outdoor PCB
F7 Outdoor exhaust temperature sensor fault Exhaust thermistor failure Check and replace exhaust sensor
F8 IPM overheat protection Inverter module too hot Check outdoor unit ventilation
F9 Outdoor fan motor fault Fan motor overcurrent or locked Check fan motor operation

H-Series (Hardware Faults)

Code Description Possible Cause Solution
H0 Electrostatic dust collector fault Dust collector module error Check dust collector, clean or replace
H1 Defrost mode Normal defrost operation Normal - wait for defrost to complete
H2 PFC protection Power factor correction fault Check power supply, replace PCB
H3 Compressor overcurrent protection Compressor drawing too much current Check compressor, charge, power
H4 IPM overheating protection Inverter power module too hot Check ventilation, reduce load
H5 IPM protection Inverter module fault Check compressor, replace outdoor PCB
H6 DC motor/fan motor protection DC fan motor fault Check indoor/outdoor fan motors
H7 Compressor desynchronization Inverter lost sync with compressor Reset power, check compressor
H8 Outdoor DC fan protection Outdoor DC fan motor fault Check outdoor fan motor
H9 PTC heater protection Auxiliary heater fault Check heater element and connections
HC PFC overcurrent protection Power factor correction overcurrent Check power supply, replace PCB

C-Series (Compressor Faults)

Code Description Possible Cause Solution
C0 Compressor phase sequence fault Incorrect phase sequence (3-phase) Swap any two phase wires
C1 Compressor overcurrent protection Excessive compressor current Check charge, voltage, compressor
C2 DC bus voltage fault Inverter bus voltage abnormal Check power supply, capacitors
C3 Phase current detection fault Current sensor error Check CT sensors, replace PCB
C5 Compressor shell over-temperature Compressor body too hot Check ambient, reduce load
C6 Inverter driver fault Inverter driver circuit error Replace outdoor PCB
C7 Compressor startup failure Compressor failed to start Check power, capacitor, compressor
C8 Compressor demagnetization Permanent magnet degradation Replace compressor
C9 Compressor rotor position fault Position detection error Check inverter, compressor winding

P-Series (Protection Codes)

Code Description Possible Cause Solution
P0 IPM over temperature protection Inverter module overheat Improve ventilation, reduce load
P1 High voltage protection Input voltage too high Check and correct supply voltage
P2 Low voltage protection Input voltage too low Check power supply
P3 Compressor terminal overheat Compressor terminal too hot Check terminal connections, tighten
P4 AC current overload protection System drawing too much current Check all components, reduce load
P5 Pressure ratio abnormal Unusual pressure ratio detected Check refrigerant charge, valves
P6 Overload protection System capacity overload Reduce load, check configuration
P7 DC bus high voltage protection Inverter bus voltage too high Check input power
P8 DC bus low voltage protection Inverter bus voltage too low Check power supply, capacitors
P9 Compressor over speed protection Compressor running too fast Check inverter control
PA 4-way valve fault Reversing valve stuck Check valve solenoid and operation
PH High pressure protection (sensor) Pressure transducer high Check charge, clean condenser
PL Low pressure protection (sensor) Pressure transducer low Check for leaks, add charge

LED Flash Codes

Code Description Possible Cause Solution
1 Flash High pressure protection HP switch activated Clean condenser, check charge
2 Flashes Anti-freeze protection Evaporator freezing Check airflow, filter, charge
3 Flashes Low pressure protection LP switch activated Find leak, add refrigerant
4 Flashes Compressor overheat Discharge temp high Check superheat, charge
5 Flashes Compressor overcurrent High amp draw Check compressor, voltage
6 Flashes Communication error Indoor-outdoor comm fault Check communication wiring
7 Flashes Mode conflict Multi-split mode conflict Set all units to same mode
8 Flashes Indoor coil overheat Heating mode overtemp Check fan operation

Gree Error Code Troubleshooting

Most Common Errors

  • • E6: Communication error - #1 most common, check wiring
  • • E1: High pressure - clean outdoor coil first
  • • F0: Low charge - find and repair leak
  • • E3: Low pressure - verify refrigerant charge

Reading Error Codes

  • • Codes display on indoor unit LED panel
  • • Remote control shows current fault code
  • • Check outdoor LED for additional codes
  • • Power cycle to clear temporary faults

E6 Communication Error Fix

E6 is the most common Gree error. Check the 3-wire communication cable between indoor and outdoor units. Verify connections at both terminal blocks. The wires should connect to matching terminal numbers (1 to 1, 2 to 2, 3 to 3 or S/C/N matching). Loose or corroded connections are the most frequent cause.