36
Service Manual
VMH 30, 36 SerieS
Heat Controller
34
9.2.3 Fan speed has been out of control
9.2.4 Open or short circuit of temperature sensor diagnosis and solution.
Yes
Replace outdoor PCB
Yes
Check the connections between the sensors
and the PCB. Are the connections good?
Replace the sensor and check if
the errors happen again?
Is the fan motor connector and
connection good?
The unit does not work normally
Turn off the unit, rotate the cross
fan. Does it rotate freely?
No
Disassemble the connection between
fan and motor, check if the
left
bearing is
normal. If not, change the bearing. If
yes, follow the below step.
Replace the fan motor
Yes
Replace the PCB
No
Yes
Is the voltage being applied to the
fan motor?
Yes
Shut off the power supply and turn on 5 seconds later
