Gree Air Conditioner Error codes

Indoor Unit Display Errors Malfunctions Yellow Red

PH

  • The capacitor on control board malfunction.
  • Outdoor control board malfunction.
High DC Bus Voltage Protection 13 flashes and 1 sec Off Supply voltage on LI and N is above 265Vac

PL

  • The capacitor on control board malfunction.
  • Outdoor control board malfunction.
Low DC Bus Voltage Protection 12 flashes and 1 sec Off Supply voltage on LI and N is below 150Vac.

P5 Protection

  • Compressor malfunction.
Compressor Phase Current
Outdoor control board malfunction
IPM module malfunction.  
PU Capacitor Charging Malfunction Capacitor malfunction  
P7 Module Temperature Sensor Malfunction Outdoor control board malfunction  

P8

  • The heat sink (radiator) not tightly mounted.
  • Control board malfunction.
Module Temperature Protection Lack of thermal grease on the IPM module.  
H3 Compressor Overload Protection 8 flashes and 1 sec Off Wiring terminal OVC-COMP is loose

H5

  • Improper or Low voltage at the IPM module.
  • IPM module malfunction.
IPM Module Protection 4 flashes and 1 sec Off IPM module over heating.

H6

  • Fan motor or blower wheel bearings malfunction.
  • Control board malfunction.
Indoor DC Fan Motor Malfunction Loose connections between fan motor and control board  

H7

  • Control board malfunction
  • Compressor malfunction
Compressor De-Synchronized Malfunction Compressor voltage is not balance.  

HC

  • Reactor filter or PFC capacitor malfunction.
  • Control board malfunction.
Power Factor Correction (PFC) Protection 14 flashes and 1 sec Off Miswiring of the reactor filter and PFC capacitor.

13

  • Fan motor malfunction.
  • Control board malfunction.
Outdoor Fan Motor Malfunction 14 flashes and 1 sec Off Loose connections between fan motor and control board
IP Incompatible Indoor and Outdoor Units 16 flashes and 1 sec Off Indoor and outdoor units are not compatible.

LC

  • Control board malfunction.
  • Compressor malefaction.
Start-Up Malfunction Over charged with refrigerant  
Error Codes Malfunction Cause
U1 Compressor Phase-Current Control board malfunction
U2 DC Bus Voltage Level Dropping Malfunction Unstable supply voltage
U3 Current Detection Malfunction Control board malfunction

U4

  • Loose connections between the reversing valve and control
  • Reversing valve solenoid malfunction.
Reversing Valve Malfunction Voltage to reversing valve is less than 175V.
U9 Zero Crossing Detection Malfunction Outdoor control board malfunction
Error Codes Cause
LO Indoor Unit Error
L1 Indoor Fan Protection
L2 E-heater Protection
L3 Water Full Protection
L4 Power Supply Overcurrent Protection
L5 Anti-freezing Protection
L7 No Master Indoor Unit Error
L8 Power Insufficiency Protection
db Special Code: Project Debugging Code
dE Indoor Unit CO 2 Sensor Error
CO Communication Error
AJ Filter Cleaning Reminding
d8 Water Temperature Sensor Error
d9 Jumper Cap Error
dA Indoor Unit Network Address Error
dH Wired Controller Circuit Board Error
dC Capacity DIP Switch Setting Error
d1 Indoor Unit Circuit Board Error
d3 Ambient Temperature Sensor Error
d4 Inlet Pipe Temperature Sensor Error
d6 Outlet Pipe Temperature Sensor Error
dL Outlet Air Temperature Sensor Error
L9 Quantity Of Group Control Indoor Units Setting Error
LA Indoor Units Incompatibility Error
LH Low Air Quality Warning
LC Outdoor-Indoor Incompatibility Error
Indoor Unit Display Malfunction Name Yellow Red

E1

  • Blocked or dirty outdoor coil.
  • Extreme outdoor ambient conditions
System High Pressure    

E2

  • Indoor fan speed is too low.
  • The indoor coil is blocked or dirty.
Indoor Anti-Freeze Protection 3 flashes and 1 sec Off Low return airflow.

FO

  • Indoor coil temperature sensor no calibrated
  • Refrigerant flow is restricted (ex. valve, debris)
Refrigerant Leakage Protection 9 flashes and 1 sec Off Refrigerant leaks.
E4 Compressor High Discharge Temperature Protection 7 flashes and 1 sec Off  

E5

  • The supply voltage is too low and the system load is too high.
  • The indoor coil is blocked or dirty.
Overcurrent Protection 5 flashes and 1 sec Off The supply voltage is unstable.
E6 Communication Malfunction Continuous Communication cable is miswired between indoor and outdoor units.

E8

  • Refrigerant metering device malfunction.
  • Compressor malfunction.
High-Temperature Resistant Protection 6 flashes and 1 sec Off Incorrect refrigerant charge level.
EE EEPROM Memory Malfunction 11 flashes and 1 sec Off Control board malfunction.

C5

  • Incorrect or damaged jumper cap on the control board.
  • Indoor and outdoor units are not compatible.
System Configuration Malfunction No jumper cap inserted on the control board.  
F0 Pump Down or Gathering Refrigerant Status 17 flashes and 1 sec Off Optional Service Mode

F1

  • Indoor ambient temperature sensor damaged.
  • Control board malfunction.
Indoor Ambient Temperature Sensor Malfunction Loose or bad connection between sensor and control board.  

F2

  • Indoor coil temperature sensor damaged.
  • Control board malfunction.
Indoor Coil Temperature Sensor Malfunction Loose or bad connection between the sensor and control board.  

F3

  • Outdoor ambient temperature sensor damaged.
  • Control board malfunction.
Outdoor Ambient Temperature Sensor Malfunction 6 flashes and 1 sec Off Loose or bad connection between sensor and control board.

F4

  • Outdoor coil temperature sensor damaged
  • Control board malfunction.
Outdoor Coil Temperature Sensor Malfunction 5 flashes and 1 sec Off Loose or bad connection between sensor and control board.
Malfunctions Indoor Unit Display Yellow Red
X fan Mode AL Operation status  
  1. Indoor Evap Coil Temperature Sensor Malfunction
  2. Indoor Evap Coil temperature sensor damaged
  3. Control board malfunction
b5 Loose or bad connection between sensor and control board  
Gas valve temperature sensor is open/short circuited b7 Hardware malfunction  
System Configuration Malfunction:

  1. Incorrect or damaged jumper cap on control board
  2. Indoor and outdoor units are not compatible
C5 No jumper cap inserted on the control board  
Communication wire error or electronic expansion valve malfunction dd Operation status  
Wrong connection of communication wire or malfunction of the electronic expansion valve dn Hardware malfunction  
System High Pressure:

  1. Blocked or dirty outdoor
  2. Extreme outdoor ambient conditions
E1 Overcharged with refrigerant  
  1. Indoor Anti-Freeze Protection
  2. Indoor fan speed is too low
  3. The indoor coil is blocked or dirty
E2 3 flashes Lav return airflow
Low-Pressure Protection
The pressure sensor is damaged
E3 9 flashes Lav on refrigerant
Compressa High Discharge Temperature Protection E4 7 flashes and 1 sec Off  
Compressa High Discharge Temperature Protection E4 7 flashes and 1 sec Off  
  1. Overcurrent Protection
  2. The supply voltage is too low and the system load is too high
  3. The indoor coil is blocked a dirty
E5 5 flashes and 1 sec Off The supply voltage is unstable
Communication Malfunction E6 Continuous Communication cable is miswired between indoor and outdoor units
Mode conflict (Indoor units calling for simultaneously Heating and Cooling) E7 Operation status  
Error codes Cause
H1 Means defrosting status. It’s the normal phenomenon.
C5 Please contact qualified professionals for service.
F1
F2
Error Codes Faults Causes
F1 Indoor Ambient Temp. Sensor Short/Open of the Indoor Ambient Temperature Sensor
F2 Indoor Evaporator Temp Sensor Short/Open of the Indoor Evaporator Temperature Sensor
F3 Outdoor Ambient Temp Sensor Short/Open of the Outdoor Ambient Temperature Sensor
F4 Outdoor Coil Temp Sensor Short/Open of the Condenser Coil Temperature Sensor
F5 Outdoor Discharge Air Temp Sensor Short/Open of the Outdoor Discharge Temperature Sensor
b5 Liquid Valve Inlet Temp Sensor Short/Open of the Liquid Valve Temperature Sensor
b7 Suction/Gas Valve Outlet Temp Sensor Short/Open of the Gas/Suction Valve Temperature Sensor
C5 Indoor Configuration Jumper Missing Configuration Jumper on Indoor Control Board
E1 High Pressure Protection Too much refrigerant or High Ambient conditions or low airflow.
E4 High Discharge Temp Protection Compressor Discharge High-Temperature Protection
E5 High Current Protection Power Supply is Not Stable and Voltage Range too large
E6 Communication Error Communication Failure or miswired between Indoor/Outdoor
E8 Overload Protection Overload Protection
E9 Indoor Condensate Full Indoor condensate pan is full and needs to be drained.
H3 Compressor Overheat Protection Compressor Thermal Overload Protection
H5 IPM Protection Module Current Protection(namely IPM Protection)
H6 Indoor fan Malfunction Indoor Fan Stopped or Running too Slow
H7 Motor Desvnchronizinq Compressor Desvnchronizinq
He PFC Error PFC Protection
Lc Startup Failure Compressor Startup Failure
Ld Phase Loss Compressor phase Failure/Reverse Protection
LP Indoor/Outdoor Mismatch Indoor and Outdoor Units Unmatched (Model or Capacity)
P5 Compressor Current Protection Phase Over-Current Protection
P7 Radiator Temp Sensor Error Short/Open Circuit of the Module Temperature Sensor
P8 Radiator Overheat Protection Module Temperature Protection
U7 4-Way Valve Malfunction Bad Connection, Solenoid Failure or Valve Malfunction
Error Codes Cause Solution
E2 is displayed One of the sensors on the appliance is faulty. Call the Service Centre.
E3 is displayed One of the sensors on the appliance is faulty. Call the Service Centre.
Symbol PUMP is displayed The condensation discharge pump is missing. Check the hose is correctly positioned.
Symbol Drop is displayed The tank is missing. Replace the tank.
The tank is full. Empty the tank.  
The tank is incorrectly positioned. Position the tank correctly.  
“--” is displayed The temperature in the room is very low. Increase room temperature.