TIP
Assembly, installation and operating instructions
39
Fault
Possible cause
Remedy
Air in the heat exchanger.
Vent heat exchanger.
Unit too loud
Speed too high.
Set a lower speed, if possible.
Air inlet/outlet opening is obstructed.
Free air ducts.
Filter dirty.
Replace filter.
Rotating parts unbalanced
Clean and/or replace impeller. Please make sure
that no balancing clips are removed during
cleaning.
Fan dirty.
Clean dirt from fan.
Heat exchanger dirty.
Clean dirt from Heat exchanger.
11.2 Fault table, electromechanical control
Fault
Possible cause
Remedy
EC fan does not rotate when power is applied to
the module and control signal > approx. 2 VDC
Mechanical blockage.
Switch off, de-energise and remove the mechan-
ical blockage.
Control voltage poles switched.
Connect the control voltage correctly.
Fan does not rotate 100% at max. control signal
10 VDC
Maximum limit set incorrectly.
Change potentiometer setting in the motor junc-
tion box.
Active temperature management effective (mo-
tor or electronics overheated).
Check that the airways are clear; remove any
foreign bodies, impeller is blocked or dirty; check
supply air temperature; check installation loca-
tion (air speed over heat sink).
11.3 Start-up after rectification of fault
After correction of the fault, carry out the following steps for recommissioning:
1. Make sure that all maintenance covers and access openings are sealed.
2. Switch off the unit.
3. Acknowledge the fault on the controller, if necessary.
Summary of Contents for TIP
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