Ultra
Assembly, installation and operating instructions
61
Fault
Possible cause
Remedy
Operating unit with integral sensor and/or ex-
ternal sensor is exposed to direct sunlight or po-
sitioned over a heat source.
Place operating unit with integral sensor and/or
external sensor in a suitable position.
Air cannot blow out or in freely.
Remove obstacles at the air outlet/air inlet.
Heat exchanger dirty.
Clean heat exchanger.
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
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).
Fault alarm (Contact C – NO open) and EC fan
operational
Electronics in motor junction box faulty.
Replace the motor junction box.
Fault signal chain fuse faulty.
Replace fuse.
11.3 Fault table, KaControl, type ..58C1/ 56C1
Fault
Possible cause
Remedy
EC fan does not rotate when power is applied to
the module and control signal > 4 VDC
Mechanical blockage.
Switch off, de-energise and remove the mechan-
ical blockage.
Control voltage fuse on terminal circuit board,
24 V power fuse on terminal circuit board and/or
fuse on the SmartBoard faulty.
Replace fuses.
Control voltage poles switched.
Connect the control voltage correctly.
EC fan does not rotate 100% at max. control sig-
nal 10 VDC
Potentiometer for maximum limit incorrectly set
on SmartBoard.
Change potentiometer setting.
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).
