Troubleshooting - Gree GWHD(18)ND3CO Installation 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 Info Code
Mode Conflict E7
Defrosting H1
Error codes are an indicator of a system malfunction or failure.The following list of error codes and descriptions:
Equipment Fault Error Codes
Indoor Ambient Temp. Sensor F1
Indoor Evaporator Temp Sensor F2
Outdoor Ambient Temp Sensor F3
Outdoor Coil Temp Sensor F4
Outdoor Discharge Air Temp Sensor F5
Liquid Valve Inlet Temp Sensor b5
Suction/Gas Valve Outlet Temp Sensor b7
Indoor Configuration Jumper C5
High Discharge Temp Protection E4
High Current Protection E5
Communication Error E6
Overload Protection E8
Compressor Overheat Protection H3
IPM Protection H5
Indoor fan Malfunction H6
Motor Desynchronizing H7
PFC Error Hc
Startup Failure Lc
Phase Loss Ld
Indoor/Outdoor Mismatch LP
Compressor Current Protection P5
Radiator Temp Sensor Error P7
Radiator Overheat Protection P8
4-Way Valve Malfunction U7
Possible Causes
Some Indoor Units are Requesting Heat and Some cooling.
Defrosting Indoor Coil during Heating Mode
Possible Causes
Short/Open of the Indoor Ambient Temperature Sensor
Short/Open of the Indoor Evaporator Temperature Sensor
Short/Open of the Outdoor Ambient temp Sensor
Short/Open of the condenser coil Temperature Sensor
Short/Open of the Outdoor Discharge Temperature Sensor
Short/Open of the liquid valve Temperature Sensor
Short/Open of the gas valve Temperature Sensor
Missing Configuration Jumper on Indoor Control Board
Compressor Discharge high Temperature Protection
Power Supply is not Stable and Voltage Range is too Large
Mis-wired or Communication Failure between the Indoor and Outdoor units
Overload Protection
Compressor Thermal Overload Protection
Module Current Protection(namely IPM Protection)
Indoor Fan Stopped or Running too Slow
Compressor Desynchronizing
PFC Protection
Compressor Startup Failure
Compressor phase Failure/Reverse Protection
Indoor and Outdoor Units Unmatched (Model or Capacity)
Phase Over-Current Protection
Short/Open Circuit of the Module Temperature Sensor
Module Temperature Protection
Bad Connection, Solenoid Failure or Valve Malfunction
APPENDIX A
Authorized Indoor Unit Combinations
18,000 BtuH Indoor Unit Size
Dual Configuration
2 Zones
24,000 BtuH Indoor Unit Size
Dual Configuration
2 Zones
Tri-Configuration
3 Zones
30,000 BtuH Indoor Unit Size
Dual Configuration
2 Zones
Tri-Configuration
3 Zones
Quad-Configuration
3 Zones
27
30,000 BtuH
9K+9K
9K+12K
Dual Configuration
9K+9K 2 Zones
9K+12K
9K+9K
9K+12K
9K+18K
12K+12K
12K+18K
18K+18K
9K+9K+9K
9K+12K+12K
9K+9K+12K
9K+9K+18K
12K+12K+12K
Tri-Configuration
3 Zones
9+9
9+12
12+12
9+18
12+18
18+18
9+9+9
9+9+12
9+12+12
9+9+18
12+12+12
9+12+18
12+12+18
Quad-Configuration
9+9+9+9
3 Zones
9+9+9+12
9+9+12+12
Indoor Unit Size
9+9
9+12
9+18
9+21
9+24
12+12
12+18
12+21
12+24
18+18
18+21
18+24
21+21
21+24
24+24
9+9+9
9+9+12
9+9+18
9+9+21
9+9+24
9+12+12
9+12+18
9+12+21
9+12+24
9+18+18
9+18+21
9+18+24
9+21+21
12+12+12
12+12+18
12+12+21
12+12+24
12+18+18
12+18+21
18+18+18
9+9+9+9
9+9+9+12
9+9+9+18
9+9+9+21
9+9+9+24
9+9+12+12
9+9+12+18
9+9+12+21
9+9+18+18
9+12+12+12
9+12+12+18
12+12+12+12
28