2
7
Installation and Maintenance
Service Manual
2. PFC protection malfunction, capacity charging malfunction
Main checking points:
If the mainboard is broken;
If the wiring of the induction is connected well and if the induction is broken;
Flow chart:
Start
Check if power supply is normal
Power supply is abnormal?
Turn on the unit
after power supply
resumes normal
Replace the outdoor
mainboard
End
Yes
No
Start
Check If the power supply is normal
Power supply is abnormal
Check if the outdoor induction is broken
n
o
it
c
u
d
n
i
e
h
t
e
c
a
l
p
e
R
n
e
k
o
r
b
s
i
n
o
it
c
u
d
n
i
e
h
T
Replace the outdoor
mainboard
Malfunction is eliminated
End
Turn on the unit after the
power supply resumes to
normal situation
Yes
Yes
Yes
No
No
No
