MANUAL AW AR EBM003 MIN

Troubleshooting/maintenance/repair |
13
11.1 Troubleshooting
Table 6 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
Material decomposition on the
impeller due to aggressive
material conveyed.
Contact Systemair
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of
a 3– phase 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/check the duct system,
see 7 Installation, page 5.
Fan operation in resonant
frequency range
Consider chapter 8.3 Variable-speed fans, page 11
Air output of fan too
low
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of
a 3– phase motor).
Wrong wiring configuration (e.g.
Y instead of Delta).
Check and possibly correct the wiring configuration.
Pressure losses too high. Optimize the line routing.
Flow regulators not or only
partly open.
Check opening position on site.
Intake or pressure ducts are
blocked.
Remove the blockage.
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 (swap two phases in case of
a 3– phase motor).
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.
Capacitor (if used) not or not
correctly connected.
Connect the capacitor correctly.
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.
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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