Installation and operating instructions

12
| Troubleshooting/maintenance/repair
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.
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.
The motors of the IV...EC have a LED in the opening on the back side that indicates the solution status to help in the fault
diagnostics:
Blinking
periods /
status
Condition
ON time
[sec]
OFF time
[sec]
Wait /
interval time
(off) [sec]
ON
Fan is running
Speed bigger than zero
- -
OFF
Fan is stopped
Speed equals zero
Warning
The LED in OFF condition doesn`t mean that there
is no power supply to the drive.
Observe 2.3 5 rules of electrical safety, page 2
- -
2
Under voltage
0.1 0.1
-
3
Overload / over current
0.25 0.25 2
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