Troubleshooting - Gree GWHD(18)ND3CO User Manual

TROUBLESHOOTING

Troubleshooting
This unit has onboard diagnostics. Informational and error codes will be displayed on the LED display on the
front panel of the indoor unit in place of the temperature display.The unit will provide informational codes
to alert the user of special system operations. Informational codes are not signs of system malfunctions or
failures. The following is a list of system informational codes and descriptions:
Description
Mode Conflict
Defrosting
Error codes are an indicator of a system malfunction or failure.The following list of error codes and descriptions:
Equipment Fault
Indoor Ambient Temp. Sensor
Indoor Evaporator Temp Sensor
Outdoor Ambient Temp Sensor
Outdoor Coil Temp Sensor
Outdoor Discharge Air Temp Sensor
Liquid Valve Inlet Temp Sensor
Suction/Gas Valve Outlet Temp Sensor
Indoor Configuration Jumper
High Discharge Temp Protection
High Current Protection
Communication Error
Overload Protection
Compressor Overheat Protection
IPM Protection
Indoor fan Malfunction
Motor Desynchronizing
PFC Error
Startup Failure
Phase Loss
Indoor/Outdoor Mismatch
Compressor Current Protection
Radiator Temp Sensor Error
Radiator Overheat Protection
4-Way Valve Malfunction
Defrost
Info Code Possible Causes
E7 Some Indoor Units are Requesting Heat and Some cooling.
H1 Defrosting Indoor Coil during Heating Mode
Error Codes Possible Causes
F1 Short/Open of the Indoor Ambient Temperature Sensor
F2 Short/Open of the Indoor Evaporator Temperature Sensor
F3 Short/Open of the Outdoor Ambient temp Sensor
F4 Short/Open of the condenser coil Temperature Sensor
F5 Short/Open of the Outdoor Discharge Temperature Sensor
b5 Short/Open of the liquid valve Temperature Sensor
b7 Short/Open of the gas valve Temperature Sensor
C5 Missing Configuration Jumper on Indoor Control Board
E4 Compressor Discharge high Temperature Protection
E5 Power Supply is not Stable and Voltage Range is too Large
E6 Mis-wired or Communication Failure between the Indoor and Outdoor units
E8 Overload Protection
H3 Compressor Thermal Overload Protection
H5 Module Current Protection(namely IPM Protection)
H6 Indoor Fan Stopped or Running too Slow
H7 Compressor Desynchronizing
Hc PFC Protection
Lc Compressor Startup Failure
Ld Compressor phase Failure/Reverse Protection
LP Indoor and Outdoor Units Unmatched (Model or Capacity)
P5 Phase Over-Current Protection
P7 Short/Open Circuit of the Module Temperature Sensor
P8 Module Temperature Protection
U7 Bad Connection, Solenoid Failure or Valve Malfunction
H1 No Failure, System is Defrost Outdoor Coil
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