KDB-GOM
Series
- 64 -
6
# 09
Failure
Abnormal RPM
No
Symptoms and Causes
Solutions
Reference
1
Fan unit RPM is too slow.
- Replace the fan unit.
<Fig. 1>
2
The fan does not rotate.
- Check whether the fan unit coil is short-
circuited. Measure the resistance and if it
displays infinite level (“0” level is normal) the
coil is short-circuited and the fan unit has to be
replaced.
3
The fan RPM check board (phase control
sensor) is out or defective.
- If the phase control sensor is out, reassemble
it. If the check board is defective, replace the
fan unit.
4
The connection of the connector terminal
is defective.
- Reassemble the connector terminal.
- If the symptoms remain after performing the
above, replace the controller.
<Fig. 1>
Phase control sensor
Measure
resistance
Fan Assembly
