Gree GUHD18ND3FO - Page 109

U-Match Series DC Inverter Service Manual
106
 P8 IPM or PFC over-temperature protection
P8 is displayed on
the wired controller
P8 is displayed in the
mainboard 88
Indicating lamp
Is the
IPM or PFC module
of mainboard
tightened？
No
Work normally
Replace the
mainboard
Yes
Tighten the IPM
or PFC module
 PH DC busbar over-voltage protection
 PL DC busbar under-voltage protection