26
| Troubleshooting/maintenance/repair
11.2 Troubleshooting
Table 14 Troubleshooting
Problem Possible causes
Corrective actions
Fan does not run
smoothly
Rotor imbalance Rebalancing by a specialist company
Soiling on the rotor Clean carefully, rebalance
Material decomposition on
the rotor due to aggressive
material conveyed
Contact Systemair
Rotor rotates in wrong
direction
Change direction of rotation (swap two phases in case of a 3–
phase motor)
Deformation of rotor due to
excessive temperature
Ensure that the temperature does not exceed the certified
value/Install new rotor
Air output of fan
too low
Rotor rotates in wrong
direction
Change direction of rotation (swap two phases in case of a 3–
phase motor)
Intake or pressure paths are
blocked
Remove the blockage
Thermal contacts/
resistors have
triggered
Motor overheated
Check the cooling impeller (if used), measure the motor
winding (if possible) / contact Systemair
Rotor rotates in wrong
direction
Change direction of rotation (swap two phases in case of a 3–
phase motor)
Motor blocked
Contact Systemair
Fan does not
reach nominal
speed
Electrical devices
(transformer, frequency
converter, etc.) set incorrectly
Check and possibly reset setting of the devices
Defective motor winding
Contact Systemair
Improperly aligned drive
motor
Contact Systemair
Motor does not
rotate
Mechanical blockage Remove the blockage
Incorrect supply voltage Check the supply voltage, re-establish the voltage supply
Incorrect connection
Disconnect from the power supply, correct the connection, see
circuit diagram
Temperature monitor has
responded
Allow the motor to cool down, find and resolve the cause of
the fault
Electronics/motor
overheated
Insufficient cooling Check, if the correct fan is used for your application/improve
cooling
Ambient temperature too
high
Check, if the correct fan is used for your application
Note:
For all other damage/defects, please contact Systemair. Defective fans must be completely replaced.
11.3 Maintenance
Draw up maintenance plan
♦ Draw up a regular maintenance plan.
♦ Document the work performed.
| 003
To Next Page
Loading...
Need help?
General