Gree GUHD09NK3FO Service Manual page 96

PU Charging circuit error
Yes
Replace the
mainboard
ee driving boar
ee is displayed
on the wired
Replace the
mainboard
Work Normally
PU is displayed on
the wired controller
PU is displayed in
the mainboard 88
indicating lamp
Is the PFC wire
tightened or is the
sequence right?
Work normally
controller
Yes
Is the
Yes
jumper
loose
No
No
Tighten the PFC
wire or adjust the
sequence
Tighten the
jumper
U-Match Series DC
Inverter Service Manual
93