INSTALLATION OPERATION AND MAINTENANCE INSTRUCTION ROOF FANS CE002

9 Troubleshooting
Note:
If you cannot find a solution to your problem in this section, speak to Systemair technical support.
Problem Cause Solution
The product does not operate smoothly.
The fan impeller is not correctly
balanced.
Speak to Systemair technical support.
There is dirt on the fan impeller. Clean the fan impeller carefully. Refer
to 8.2 To clean the product.
The fan impeller has damages or
deformations because the transported
air contains aggressive media.
Speak to Systemair technical support.
The fan impeller does not turn in the
correct direction.
Make sure that the electrical connection
is correctly done.
The fan impeller has deformations
because of too high temperatures.
• Replace the fan impeller.
• Make sure that the temperature of
the transported air is not higher than
the value on the name plate.
There are unusually strong vibrations in
the product or the duct system.
Make sure that the product is correctly
installed. Do a check of the duct system.
The product is operated in a resonant
frequency range.
Increase or decrease the fan speed
until the product operates smoothly.
Refer to 6 Commissioning.
The air output is not sufficient.
The fan impeller does not turn in the
correct direction.
Make sure that the electrical connection
is correctly done.
The electrical connection is not
correctly done.
Make sure that the electrical connection
agrees with the wiring diagrams.
The air pressure is too low because of
incorrect installation.
Do the necessary changes in the duct
system and installed components to
increase the air pressure. Refer to 6
Commissioning.
The airflow shutters are closed or not
fully open.
Adjust the airflow shutters.
There is blockage in the air inlet or the
duct system.
Remove the blockage.
The product is not applicable for the
installation location.
Make sure that the product is applicable
for the installation location.
The motor power is decreased because
of too high temperature in the motor.
Note:
This is applicable for EC motors only.
• Do a check of the ambient
temperature.
• Make sure that the space around the
motor is sufficient to keep the
temperature down.
There is unusual noise when the
product starts or operates.
There is strain in the connections of the
duct system.
Loosen the connections, align the parts
of the duct system correctly and tighten
the connections.
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