Trouble and Remedy for Rosenberg Fans when motor failure to start
Motor symptom: Failure to start
Possible causes:
· Electrical supplies – phase
· failure due to blown fuse
· Electrical supply – low voltage
· Faulty contact in controlgear
· Overload
Remedy when motor failure to start
· Trace and remove fault renew blown fuse
· Switch off offending heavy load or refer to Supply Authority
· Renew faulty contacts
· Reduce loading or replace with larger motors
· Remove foreign object or align impeller if touching casing or replace faulty bearings
Trouble and Remedy for Rosenberg Fans when motor tripping
Motor symptom: Motor tripping
Possible causes:
· Motor over heated
· Over Current
· Motor overloaded
Remedy when motor tripping
· Clean motor cover & ensure cooling fan is running
· Coils burnt/shorted to rewind motor coils
· Ground and replace bearings imbalance supply
· Repair control panel
Trouble and Remedy for Rosenberg Fans when motor excessive hum
Motor symptom: Excessive hum
Possible causes:
· Uneven gas
· Winding fault
· Rotor mechanically
· Unbalanced
· Foreign matter fouling air gap
Remedy when motor excessive hum:
· Replacement bearings
· Rewind or effect winding repair
· Dynamically balance rotor
· Dismantle and clear air gap
Trouble and Remedy for Rosenberg Fans when motor regular clicking noise
Motor symptom: Regular clicking noise
Possible causes:
Bearing worn due to lack of lubrication or excessive overload
Remedy
Fit replacement bearings and renew grease with recommended grade
Trouble and Remedy for Rosenberg Fans when motor knocking or rumbling noise
Motor symptom: Knocking or rumbling noise
Possible causes:
· Bearing slack in housings
· Bearing moving on shaft
Remedy
Fit replacement end shields or liners in bearing housings
Build up shaft diameter at bearing position or sleeve shaft to achieve correct diameter or fit replacement shaft
Trouble and Remedy for Rosenberg Fans when motor Excessive vibration
Motor symptom: Excessive vibration
Possible causes:
· Foreign matter in bearing housing
· Buildup of dust or damage to impeller
· Rotor/impeller imbalance
Remedy when motor Excessive vibration
· Wash out bearing and housing with paraffin or equivalent and renew grease with recommended grade
· Clean impeller, replace if damage
The contact addresses are to be found in the attachment, or else please phone +49 (0)7940 / 0917 186 894 or email toinfo@rosenberg.com.vn