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1. Check if fan terminal
OFAN is connected well
2. Test if resistance value
of any two terminals is less
than 1k with ohmic meter
If the indoor and outdoor
fan work well?
After the unit de-
energized for 20min
Replace
control board
AP1
If the radiating of outdoor
and indoor unit is well?
Improve the
radiating
environment of
unit
Replace
outdoor fan
Y
Replace fan
capacitor C1
Anti-high temperature,
overload protection
Normal protection, please use
it after improve the outdoor
ambient temperature
If the outdoor ambient temperature is
higher than 53 ºC?
N
Y
N
Y
N
End
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