Gree FGR20Pd/DNa-X - Page 111

GREE Duct type split Air conditioner Inverter Series
109
Troubleshooting:
“PC” circuit malfunction
of driven current detection
for compressor
Try to cut off the power
for over 3 times, and then re-energize
the unit to check if the error
is eliminated
Driven board of compressor is
faulted
No
Replace the driven board of
compressor
Yes
(52) “PH” high voltage protection for driven DC bus bar of compressor
Error display: ODU mainboard displays .
Applicable model: all models.
Condition and method for fault judgement:Check if the voltage of input power cord for mainboard
is over 460V, if yes, the protection occurs.
Possible causes:
1) Voltage of input power cord is over 460V.
2) Driven board of compressor is faulted.
Troubleshooting:
“PH” high voltage
protection for driven DC
bus bar of compressor
Driven board of
compressor is faulted
Yes
Check if the voltage of input
power cord is over 460V?
No
Replace the driven board
of compressor
Yes
Adjust the voltage as
400V
(53) “PL” low voltage protection for driven DC bus bar of compressor
Error display:ODU mainboard displays .
Applicable model: all models.
Condition and method for fault judgement:Check if the voltage of input power cord for mainboard
is less than 320V, if yes, the protection occurs.
Possible causes:
1) Voltage of input power cord is less than 320V.
2) Driven board of compressor is faulted.