Gree GUHD09NK3FO Service Manual page 93

U-Match Series DC
Inverter Service Manual
P8 IPM or PFC over-temperature protection
PH DC busbar over-voltage protection
PL DC busbar under-voltage protection
90
P8 is displayed on
the wired controller
P8 is displayed in the
mainboard 88
Indicating lamp
Yes
IPM or PFC module
of mainboard
tightened
Replace the
mainboard
Work normally
PH or PL is displayed on
the wired controller
PH or PL is displayed in
the mainboard 88
indicating lamp
Is input voltage
ranged from 185VAC
Yes to 264VAC?
Replace the
mainboard.Does
it work normally?
No
Replace the
compressor normally
Is the
No
Tighten the IPM
or PFC module
No
Yes
Please cut off the
Work
power and notify the
power company.