34
1.53
TOP unit heaters
Unit heaters (2-stage three-phase motor/1-stage AC single-phase motor/continuously variable EC single-phase motor)
Installation and operating instructions
Fault
Possible cause
Remedy
Fan does not rotate when
power is applied to the
module and control signal
< approx. 1.5 VDC
Mechanical blockage
Switch off, de-energise and
remove mechanical blockage
Bridge missing at enable input (if fitted)
Insert bridge
Control voltage poles switched
Correctly connect control voltage
Temperature detector has responded
Allow motor to cool down, identify and
rectify cause of fault, possibly remove
automatic switch-on lock.
Fan does not rotate 100 %
at max. control signal
10 VDC
Maximum limit incorrectly set
Check potentiometer in motor junction box.
Active temperature management effective
(motor or electronics overheated)
Check airways are clear, possibly
remove foreign bodies; impeller is
blocked or dirty; check temperature of
supply air; check installation space
(air speed over cooling body)
Fault message
(Contact C – NC open) and
fan operational
Fault signal chain fuse faulty
Check fuse
Fan does not have fault signal contact
with additional fans with fault signal contact
in a group wire contact C - NO
Refer to the operating instructions for the fan for further fault messages
Fault
Possible cause
Remedy
Fan does not rotate when
power is applied to the
module and control signal
< 4 VDC
Mechanical blockage
Switch off, de-energise and
remove mechanical blockage
Control voltage fuse on connecting board,
24 V voltage fuse on connecting board and/or
fuse on KathermBoard faulty
Check fuses
Control voltage poles switched
Correctly connect control voltage
Temperature monitor has responded
Allow motor to cool down, identify and
rectify cause of fault,
Possibly remove automatic switch-on lock.
Fan does not rotate
100 % at max.
control signal 10 VDC
Potentiometer for maximum limit on
KathermBoard set incorrectly
Check potentiometer
Active temperature management effective
(motor or electronics overheated)
Check airways are clear, possibly
remove foreign bodies; impeller is
blocked or dirty; check temperature of
supply air; check installation space
(air speed over cooling body)
Fan fault signal for
fan without fault signal
contact
no cable bridge at terminals Ls and S on the
PCB
insert cable bridge
For other faults refer also to Assembly and Installation Instructions for KaControl for Unit Heaters I438.
13.5 EC single-phase motor with motor junction box type ...33/34
13.6 EC single-phase motor with KaControl recirculation air module type ...33C1/34C1
Summary of Contents for Lufterhitzer TOP Series
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