Malfunction Of Blocked Protection Of Idu Fan Motor L2 - Tadiran Telecom SMVH09A-2A1B1NA Service Manual

Troubleshooting

(2) Malfunction of Blocked Protection of IDU Fan Motor L2

Main detection points:
● SmoothlyIs the control terminal of PG motor connected tightly?
● SmoothlyIs the feedback interface of PG motor connected tightly?
● The fan motor can't operate?
● The motor is broken?
● Detectioncircuit of the main board is defined abnormal
Malfunction diagnosis process:
While power is off stir the blade
with a tool to see whether the
blade rotates smoothly
Check if the connection of PG
Check if the connection of PG
Turn on the unit again; measure
whether the output voltage on
control terminal for PG motor is
more than 50V within 1 min after
the louvers are opened
Replace the mainboard
40
Start
Tighten the screw; reassemble the blade, motor
and shaft bearing rubber base sub-assy to make
sure there is no foreign object between them
Yes
No
Yes
No
Yes
No
Yes
No
No
with the same model
End
No
Is malfunction
eliminated
No
Insert the control terminal
of PG motor tightly
Is malfunction
eliminated
No
Reinstall the blade
and motor correctly
Is malfunction
eliminated
Yes
Is the motor started up
No
Replace PG motor
Is malfunction
eliminated
Yes
Yes
Yes
Yes
Yes