GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
26
No. Error code Error
12 F6 ODU tube temperature sensor error
13 H3 Compressor overload protection
14 PL Bus low-voltage protection
15 PH Bus high-voltage protection
16 PA ODU AC current protection
17 H5 IPM module current protection
18 H6 DC fan error
19 HC PFC overcurrent protection
20 Lc Compressor startup failure
21 P0 Driver reset protection
22 P5 Compressor phase over-current protection
23 Pc Driver current error
24 H7 Compressor out-of-step protection
25 P7 Module temperature sensor circuit failure
26 ee Drive memory chip error
27 PU Capacitor charging failure
28 A1 Outdoor fan IPM module protection
29 AC Outdoor fan startup failure
30 UL Outdoor fan overcurrent protection
31 AE Outdoor fan current detection circuit error
32 AJ Outdoor fan out-of-step protection
If malfunction occurs during operation, LCD temperature display zone will show the failure information. If
several malfunctions occur at the same time, their corresponding error codes will be shown in turn. When
malfunction occurs, please shut off the unit and send for professional personnel to repair. For example, E1 (as
shown below) indicates high pressure protection.
3.4 Troubleshooting
3.4.1 “E1” Compressor High-Pressure Protection
Error display
ODU mainboard LED displayer
Error judgment condition and method
It is judged through the action of high-pressure switch. If the high-pressure switch is cut off, it is judged that
high-pressure is too high and the system stops operation for protection.
Possible reason:
■Cut-off valve of ODU or IDU is not fully opened.
■High-pressure switch is abnormal.
■Outdoor or indoor fan is not working properly.
■IDU filter or air duct is blocked (heating mode).
■Ambient temperature is too high.
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