Anti-High Temperature And Overload Malfunction - York DHM42CMB21S Service Manual

(4) Anti-high temperature and overload malfunction

Main checking points:
● If the outdoor ambient temperature is within the normal range.
● If the outdoor fan is running normally.
● If the indoor and outdoor radiation environment is good.
Flow chart:
If the outdoor fan is working normally
26
Start
If the outdoor ambient temperature
is above 53
no
If the indoor and outdoor radiation
is insufficient
no
yes
Replace outdoor
mainboard
End
It is a normal protection, please
yes
operate the unit after the outdoor
ambient temperature has changed
yes
Improve the radiation
environment of the unit
no
Check if the terminal of the fan is
connected well, if the fan is broken
Replace fan capacitor
Replace outdoor fan