Troubleshooting - Munters VX55 Instruction Manual

Troubleshooting

5.1 Troubleshooting
! WARNING
High Voltage, disconnect
power before servicing.
SYMPTOM
• Fan Not Operating
• Fan Does Not Start
Caution: There is a 10 second
delay for the fan to start when
an 'On' command is present.
• Fan Operating -
Insuffi cient Airfl ow
• Excessive Noise
• Excessive Vibration
© Munters Corporation, August 2018
! WARNING
Moving parts, disconnect
power before servicing.
POSSIBLE CAUSES
• Fan control set above room
temperature
• Blown Fuse or open circuit breaker
• Propeller blade contacting fan
housing
• Fan control defective (i.e. Farm
Premium, etc.)
• Munters Drive motor/controller
issue
• Shutter or Damper door jammed
• Guard dirty/clogged
• 10-0V signal set incorrectly
• Propeller blade contacting fan
housing
• Motor loose on mount
• Propeller damaged
5.
CORRECTIVE ACTION
• Set to a lower temperature
• Replace fuse or reset breaker
• Realign motor in fan housing
• Repair or replace control
1. Verify AC voltage is present at fan.
2. Turn AC power off to fan for 1 minute
3. Verify Prop turns freely
a. If not contact Munters Product Support
b. If it turns freely go to next step
4. Turn AC power back on to fan
a. If starts up and runs, fan OK
•Periodically observe fan to verify it is still running
•If it continues to run, fan is OK
•If fan stops, look through clear window in drive
cover to check what drive display reads.
Contact Munters Product Support
b. If fan tries to start but stops, look through clear
window in drive cover to check what drive display
reads. Contact Munters Product Support
c. If fan doesn't try to start, verify 'On' command
signal is present at circuit board. Also, slide the
switch on the circuit board to the 'On' position.
• Clean shutter or damper door
• Clean guard
• Check and adjust 10-0V signal
• Sand fan housing to remove high spot
• Tighten fasteners
• Replace propeller
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