SystemAir 218463, Installation And Operating Instructions Manual

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Troubleshooting/maintenance/repair |
11
11 Troubleshooting/maintenance/repair
Safety information
♦ Observe 2 Important safety information , page 1
Troubleshooting
Problem Possible causes
Remedy
Fan does not run
smoothly
Impeller imbalance
Rebalancing by a specialist company if possible,
otherwise contact Systemair.
Soiling on the impeller Clean carefully, rebalance
Impeller rotates in wrong
direction.
AC motor
Change direction of rotation (swap two phases in case of
a 3– phase motor).
EC motor
Contact Systemair
Deformation of impeller due to
excessive temperature. Ensure that the temperature does not exceed the certified
value/Install new impeller.
Vibrations, oscillations
Check the installation of the fan.
Fan operation in resonant
frequency range Consider chapter 8.3 Variable-speed fans (Frequency
converter / EC motor) , page 9
Air output of fan too
low
Impeller rotates in wrong
direction.
AC motor
Change direction of rotation (swap two phases in case of
a 3– phase motor).
EC motor
Contact Systemair
Wrong wiring configuration (e.
g. Y instead of Delta).
Check and possibly correct the wiring configuration.
Grinding sounds
when starting or
operating the fan
Mechanical blockage Contact Systemair
Thermal contacts/
resistors have
triggered
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of
a 3– phase motor).
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.
Wrong wiring configuration (e.
g. Y instead of Delta).
Check and possibly correct the wiring configuration.
Motor blocked
Contact Systemair
Fan does not reach
nominal speed
Defective motor winding
Check the winding by resistance measurement (if
possible).
Contact Systemair
Control units (if used) such as
frequency converter or
transformer are set incorrectly.
Correct the settings of the control units.
Wrong wiring configuration. Check and possibly correct the wiring configuration.
Mechanical blockage Remove the blockage.
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.
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