Gree GUHD18ND3FO - Page 111

U-Match Series DC Inverter Service Manual
108
 PU Charging circuit error
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?
Tighten the PFC
wire or adjust the
sequence
Replace the
mainboard
Yes
No
Work normally
 ee driving board chip error
Yes
Yes
ee is displayed
on the wired
controller
Is the
jumper
loose？
Work Normally
Tighten the
jumper
Replace the
mainboard
No