Troubleshooting/maintenance/repair |
11
Troubleshooting cont'd
Grinding sounds
when starting or
operating the fan
Check if the duct connections of
the fan are strained.
Loosen the duct connections and realign it.
Thermal contacts/
resistors have
triggered
Impeller rotates in wrong
direction.
Change direction of rotation if possible, otherwise contact
Systemair.
Missing phase
In case of a 3 phase standard motor (not EC), check if all 3
phase are present.
Motor overheated
Check the cooling impeller (if used), measure the motor
winding (if possible) / contact Systemair.
Motor blocked
Contact Systemair
Fan does not reach
nominal speed
Defective motor winding
Contact Systemair
Control units (if used) such as
frequency converter or
transformer are set incorrectly.
Correct the settings of the control units.
Mechanical blockage
Remove the blockage.
Frozen condensate blocking the
impeller
Thaw and drain the condensate
Motor does not
rotate
Faulty supply voltage
Check the supply voltage, re-establish the voltage supply.
Faulty 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
Improve cooling.
Overloaded motor
Check if the correct fan is used for your application.
Ambient temperature too high
Check if the correct fan is used for your application.
Note:
For all other damage/defects, please contact Systemair.
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