3.3.5
EF---ODU DC fan motor failure
Shut off
Check the fan blade by
No
hand, can it rotate freely
Yes
Works normal?
Yes
No
Fan motor well
No
connect to PCB
Yes
Works normal?
Yes
No
•
For built-in control (5pins)
motor: check the V
m
=310V?
V
cc
=15V?
• For external control (3pins)
motor: test voltage btw U/V/W ,
normally from DC 20~200V.
Yes
Check the fan motor,
can it operate or not.
Works normal?
No
No
Yes
Replace fan motor
Works normal?
No
Replace ODU PCB
Yes
End