Fumex C 600HT, Manual

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9
FUMEX C 600HT
Manual
7 Troubleshooting
TROUBLESHOOTING GUIDE
Symptom Possible cause
1. Too much
vibration or noise.
Damaged impeller.
The fan is not mounted fully level.
Dirt or other accumulation on impeller that causes imbalance.
Other cause of imbalance in the impeller.
Parts rubbing against each other.
Ball bearing damage or wear.
Fault in measuring equipment that indicates imbalance.
Deformed motor shaft.
The impeller centre screw is loose or the screw to the motor cooling panel is loose.
The motor cooling panel is damaged.
2. Motor overload.
Contact between impeller and fan housing.
Ball bearing damage or wear.
Damage to the motor windings (e.g. overheating, degraded insulation, winding failure).
Fault on motor protection switch.
Fault on one of the motor phases.
The motor is exceeding the maximum permissible speed.
Too little resistance in the airflow.
3. Fan fails to start.
Contact between impeller and fan housing.
Foreign object inside fan.
Fault on one of the motor phases.
Starting equipment does not work as intended (e.g. Y/D starter).
Safety equipment reset has not occurred/faulty safety equipment.
Motor incorrectly connected or damaged.
Mains voltage too low.
4. Protective equipment
is activated during
operation and fan
overheats.
Extended start-up time.
Motor overload.
Motor start-ups too frequent.
Wrong protective equipment for the purpose.
Cross-sectional area of the connecting cables is incorrect.
Motor cooling inadequate, e.g. damage to the motor’s cooling fan.
Too little resistance in the airflow.
5. Too little flow.
Broken fan.
Frequency too low.
Object in ventilation or pipe system.
Damaged ball bearings.
Fan is operated in wrong direction of rotation.