39
Installation and Maintenance
Service Manual
Start
Check If the power supply is normal
Power supply is abnormal
Check if the outdoor induction is broken
n
o
it
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c
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l
p
e
R
n
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k
o
r
b
s
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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
For 21/24/28K
