Problem
Solution
Fan does not run
Check power supply and motor-circuit switch. If problem not found, check motor. If
motor has separate coils, check both speeds.
Volume of airflow too low
Check direction of rotation. If necessary, change motor rotation direction by inter-
changing two phases. Check intake area for blockage. Check operating point and
execution of the system.
Motor-circuit switch has been
triggered
Check the motor specifications. If OK, check electrical supply (mains) and motor
(short circuit, damage in storage, impeller blocked or scraping); contact customer
service.
Abnormal noises
The development of noise in a fan depends to a great extent on the installation
situation and the operating conditions. This is why no generally applicable data
on noise can be given; such data is always relative to the conditions of measure-
ment. For details, please check our data sheets.
Possible sources of error:
•
Bearing damage on motor; impeller blocked or scraping
•
Impeller unbalanced or damaged
•
Impeller blades at non-matching angles
•
Impeller running in the stalling range
•
Loose components
Have the motor or, if necessary, the entire fan repaired.
Vibrations
Check operating point and execution of the system. If the actual overall resistance
of the system is higher than specified, this can cause some fan models to operate
in the stalling range.
Contact the manufacturer‘s customer service center.
Change for damage or dust deposits on impeller.
Check welding seams on housing.
When in doubt, contact the manufacturer‘s customer service center.
15
Decommissioning, Disposal
Danger!
Live cables and connections.
Danger of personal injury from electrical current.
Have all electrical work performed by a qualified electrician.
Danger!
Danger of personal injury if the fan falls.
Make sure the area is inaccessible to unauthorized persons while dismantling the fan.
Use suitable hoisting devices and fastening equipment.
Do not stand under the load during transport.
Disconnect the equipment from power before decommissioning the fan.
Put the motor out of service and dispose of it as described in the manufacturer‘s operating instructions.
After final decommissioning of the fan, dispose of all materials in accordance with the applicable laws and regulations.
37
Jet Fans
