43
Ultra
1.54
Comfortable indoor climate in high-end interiors
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 V DC
Mechanical blockage
Switch off, disconnect from power supply and remove
mechanical blockage
No bridge on enable input (if present)
Insert bridge
Control voltage poles switched
Correctly connect control voltage
Temperature monitor has responded
Allow the motor to cool down, find and rectify the
cause of the fault and trigger automatic restart lock
if necessary
Fan does not rotate 100% at
max. control signal 10 V DC
Maximum limit incorrectly set
Check potentiometer in motor junction box
Active temperature management effective (motor
or electronics overheated)
Check that the airways are clear; remove foreign
bodies if present, impeller is blocked or dirty; check
supply air temperature; check installation location
(air speed over cooling body)
Fault message
(Contact C – NO open) and
fan operational
Fault signal chain fuse faulty
Check fuse
Fan without fault signal contact
In the event of additional fans with a fault signal
contact in a group, wire contact C - NC
Fault
Possible cause
Remedy
Fan does not rotate when
power is applied to the
module and control signal
> 4 V DC
Mechanical blockage
Switch off, disconnect from power supply and remove
mechanical blockage
Control voltage fuse on connecting PCB, 24 V
power fuse on connecting PCB and/or fuse on the
KathermBoard is faulty
Check fuses
Control voltage poles switched
Correctly connect control voltage
Temperature monitor has responded
Allow the motor to cool down, find and rectify the
cause of the fault and trigger automatic restart lock
if necessary
Fan does not rotate 100 % at
max. control signal 10 V DC
Potentiometer for maximum limit incorrectly set on
KathermBoard
Check potentiometer
Active temperature management effective (motor
or electronics overheated)
Check that the airways are clear; remove foreign
bodies if present, impeller is blocked or dirty; check
supply air temperature; check installation location
(air speed over cooling body)
14.5 EC single-phase motor with motor junction box type ...33/34
14.6 EC single-phase motor with KaControl recirculation air module type ...33C1/34C1
Refer to the operating instructions for the fan for further fault messages
For other faults refer also to: Assembly and Installation Instructions for KaControl for Unit Heaters I438.
