Munters WM54 - Troubleshooting; Common Symptoms and Corrective Actions

36 | © Munters AB, 2019
9. TROUBLESHOOTING
WARNING
Moving parts, disconnect power before servicing.
WARNING
High voltage, disconnect power before servicing.
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
• Fan not operating
• Fan control set above room temperature
• Blown Fuse or open circuit breaker
• Propeller blade contacting fan housing
• Fan control defecting
• Motor defective
• Set a lower temperature
• Replace fuse or reset breaker
• Realign motor in fan housing
• Repair or replace control
• Repair or replace motor
• Fan operating -
insufficient airflow
• Damper door jammed
• Guard dirty/clogged
• Clean damper door & fan housing
• Clean guard
• Excessive noise
• Propeller blade contacting fan housing
• Sand fan housing to remove high spot
• Excessive vibration
• Motor loose on mount
• Propeller damaged
• Motor or propeller shaft bent
• Tighten fasteners
• Replace propeller
• Repair or replace motor or propeller shaft
• Fan never turns off
• Override thermostat set incorrectly
• Control set for continuous operation
• Set to the correct temperature
• Set control correctly
It is normal that the damper does not open completely. No corrective actions are needed.