57
Installation and Maintenance
Service Manual
6.High temperature prevention protection ; high power ; system is abnormal
Main check points:
(1) outdoor temperature (2) fan (3)air inlet and air outlet of indoor/outdoor unit
NOTE:The control board as below means the control board of outdoor unit.
Y
N
Y
N
Y
N
Overload protection,
high temperature
prevention protection
Is the outdoor ambient temperature
higher than 53℃？
Normal protection. Please operate
it when the outdoor ambient
temperature is improved.
After the complete unit is disconnected
from the power for 20mins
Is the radiation of indoor unit
and outdoor unit is not good?
Improve the unit's
radiation environment.
Check whether the fan terminal
OFAN is connected well
Measure any two
terminal with the ohmmeter and resistance
is less than 1,000ohm.
Check whether the outdoor
fan operates normally?
Replace the fan capacitor C1
Replace the outdoor fan
Replace the control board
End
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