37
TROUBLESHOOTING CONTINUED
(4) Anti-high temperature and overload malfunction
Main checking points:
●
● Is the outdoor fan running normally;
Is the outdoor ambient temperature above the operating limit ;
● Are the indoor and outdoor heat exchangers dirty or blocked;
Flow chart:
Start
Is the outdoor ambient temperature
above 125°F
yes
yes
yes
no
no
no
The system is not designed to
operate above 125°F - this is
normal system protection
Is the indoor or outdoor heat
exchanger dirty or blocked
Correct the heat exchanger
problem
Is the outdoor fan working correctly
Is the outdoor fan motor connected
correctly
Replace fan capacitor
Replace outdoor fan
motor
Replace outdoor
mainboard
End
yes
yes
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