Service Manual -
VMH 9/12/18/24 SU & VMH30/36S D Series
30
33
9.3.4 Fan speed has been out of control diagnosis and solution
(E3)
Error Code
E3/F5
Malfunction conditions
When indoor fan speed
remains
too low (300RPM) for certain
time, the unit will stop and the LED will display the failure.
Possible
causes
●
Wiring
error
●
Fan ass
embly
faulty
●
Fan motor faulty
●
PCB faulty
Troubleshooting:
Shut off the power supply,
fan rotates by hand
Is fan motor wiring correct
and solid?
Runs
Does Not Run
Measure the voltage for
the fan motor from the
main PCB. OK?