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© Munters Corporation, February 2019
QM1061r1
Troubleshooting
7.
Fan Operating-
Insuf
fi
cient
Air
fl
ow
Excessive
Vibration
Excessive Noise
1. Fan control set above room
temperature
2. Blown fuse or open circuit breaker
3. Propeller blade contacting fan
housing
4. Fan control defective
5. Motor defective
1. Shutter jammed
2. Guard dirty
3. Frequency drive improperly adjusted
4. Incorrect Belt Tension/worn belt
1. Propeller blade contacting fan housing
2. Motor bearing or shaft bearing defective
3. Frequency drive improperly adjusted
4. Variable speed control defective
1. Motor loose on mount
2. Propeller damaged
3. Motor Shaft Bent
1. Set to a lower temperature
2. Replace fuse or reset breaker
3. Realign motor in fan housing
4. Repair or replace control
5. Repair or replace motor
1. See operation, Step 2 for adjustments guidelines
2. Clean guard
3. See operation, Step 2 for adjustments guidelines
4. See Maintenance Section, Belt Tensioning
1. Adjust bearing position to realign propeller
2. Repair or replace motor or shaft bearings
3. See operation, Step 2 for adjustments guidelines
4. Repair or replace control
1. Tighten fasteners
2. Replace propeller
3. Repair or replace motor or propeller shaft
Fan Not Operating
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Fan never turns off
1. Override thermostat set incorrectly
2. Control set for continuous operation
1. Set to the correct temperature
2. Set speed control correctly
WARNING
!
Disconnect Power
Before Servicing
WARNING
!
Moving Parts, Disconnect
Power Before Servicing.
WARNING
!
Moving Parts: Disconnect
Power Before Servicing.