Problem
Cause
Solution
Thermal contacts, PTC or resistors are
released.
The fan impeller does not turn in the
correct direction.
Make sure that the electrical connection
is correctly done.
A phase loss occurred.
If the motor is a 3-phase motor, make
sure that no phase is missing.
Note:
This is not applicable for EC motors.
The motor is overheated.
• Do a check of the motor cooling
impeller.
• If it is possible, measure the
resistance to do a check of the motor
winding.
The capacitor is not connected or not
correctly connected.
Note:
This is not applicable for EC motors
or 3–phase AC motors.
Connect the capacitor correctly. Refer
to the included motor wiring diagram.
There is blockage in the motor.
Speak to Systemair technical support.
The fan speed does not get the nominal
value.
Defective motor winding.
If it is possible, measure the resistance
to do a check of the motor winding.
The speed control is not correctly set.
Set the speed control correctly.
The fan impeller cannot turn freely
because of mechanical blockage.
Remove the blockage.
Phase loss occurs.
If the motor is a 3-phase motor, make
sure that no phase is missing.
The motor does not rotate.
A component in the power supply is
defective.
Do a check of the power supply.
Replace defective components and
connect the power supply again.
The electrical connection is not
correctly done.
Make sure that the electrical connection
agrees with the wiring diagrams.
The motor protection is released
because the motor is overheated.
Let the motor become cool. Reset the
motor protection. Find the cause of the
overheated motor.
A phase loss occurred.
If the motor is a 3-phase motor, make
sure that no phase is missing.
The electronic components or the motor
is overheated.
The motor is overloaded or the ambient
temperature is too high.
Let the motor become cool. Reset the
motor protection. Find the cause of the
overheated motor.
The motor is overloaded.
Make sure that the product is applicable
for the installation location.
The ambient temperature is too high.
Make sure that the product is applicable
for the installation location.
The cooling of the product is not
sufficient.
Make sure that the space around the
motor is sufficient to keep the
temperature down.
11
Summary of Contents for KE 50-24-4
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