Troubleshooting - Gree GUD24W2/D-D(U) Service Manual

GREE
No. Error code
12 F6
13 H3
14 PL
15 PH
16 PA
17 H5
18 H6
19 HC
20 Lc
21 P0
22 P5
23 Pc
24 H7
25 P7
26 ee
27 PU
28 A1
29 AC
30 UL
31 AE
32 AJ
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.
DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
ODU tube temperature sensor error
Compressor overload protection
Bus low-voltage protection
Bus high-voltage protection
ODU AC current protection
IPM module current protection
DC fan error
PFC overcurrent protection
Compressor startup failure
Driver reset protection
Compressor phase over-current protection
Driver current error
Compressor out-of-step protection
Module temperature sensor circuit failure
Drive memory chip error
Capacitor charging failure
Outdoor fan IPM module protection
Outdoor fan startup failure
Outdoor fan overcurrent protection
Outdoor fan current detection circuit error
Outdoor fan out-of-step protection
Error
26