Gree UM600PH/A-M, Service Manual

Page: 103 / 121

GREE Duct type Ducted Type Split Air-Conditioner Units
103
Possible cause: ——
Troubleshooting: ——
(40) “nC” cooling only model
Display: ODU mainboard displays .
Applicable model: all models.
Condition and method for fault judgement: The code represents the cooling only status, which
prompts that the system has been set as cooling only status, the IDU can only conduct cooling
operation.
Possible cause: ——
Troubleshooting: ——
(41) “nE” negative code
Error display: ODU mainboard displays .
Applicable model: all models.
Condition and method for fault judgement:
The code is negative code that prompts the data
displayed later is negative.
Possible cause: ——
Troubleshooting: ——
(42) “nF” fan model
Error display:
ODU mainboard displays .
Applicable model: all models.
Condition and method for fault judgement: The code represents fan status, which prompts that
the system has been set as fan status, the IDU can only conduct fan mode operation.
Possible cause: ——
Troubleshooting: ——
(43) “P0” malfunction driven board for compressor
Error display: IDU wired controller displays .
Applicable model: all models.
Condition and method for fault judgement: View the error code via IDU wired controller, if the IDU
wired controller displays PO, then view the display of dual-8 nixie tube of main control board of ODU.
According to the error code of main control board can estimate the the specific error of driven board of
compressor, and then conduct troubleshooting by referring to specific troubleshooting methods.
Possible causes:
1) Reset protection for the driven module of compressor (dual-8 nixie tube of main control
board of ODU displays P3).