imo fans atex006

Troubleshooting/maintenance/repair |
25
12.1 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
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 8 Installation, page 17.
Fan operation in resonant frequency range
Consider chapter 9.2 Variable-speed fans, page
22
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).
Contact Systemair
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.
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).
Contact Systemair
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.
Motor does not
rotate
Faulty supply voltage
Check the supply voltage, re-establish the
voltage supply.
Mechanical blockage Remove the blockage.
Frozen condensate blocking the impeller
Thaw and drain the condensate
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.
Improve cooling.
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