48
2.55
ProtecTor
A new dimension in door screening
Installation and operating manual
Fault
Possible cause
Troubleshooting
Impeller not running concentrically
Imbalance of rotating parts
Clean the unit, replacing the unit if there is still imbalance after
cleaning.
Please make sure that no balancing brackets are removed during
cleaning.
Air flow is not warm in heating
mode
Insufficient heating medium
Check heating medium (heating circuit, boiler) and remedy fault
Air in the heat exchanger
Vent heat exchanger
Fan is not moving any or too little
air
Air flow is interrupted or disrupted e.g. by dirty filter or dirty heat
exchanger
Restore a clear air passage, change the filter and / or replace the
heat exchanger
Wrong direction of rotation
Check the direction of rotation of the fan
Water outlet
Fault on the heat exchanger
Replace the heat exchanger if you need to
Hydraulic connection not properly done
Check supply and return and tighten, if necessary
Unit too loud
Fan speed too high
Select a lower fan speed, if possible
Air intake / air discharge opening obstructed
Clear air route
Fault
Possible cause
Troubleshooting
Fan does not rotate when motor is
switched on and standby light on
Setpoint temperature too low
Raise setpoint
Door contact has switched off
Check door contact, insert jumper if necessary
Fan does not rotate when motor is
switched on and standby light is off
No power supply to unit
check fuses in sub-junction box
No control voltage
Check control fuse in switch unit
Cable connection broken
Check cable connections
Fan thermal contact has been triggered (overheating risk)
Check motor temperature and allow to cool down if necessary.
Clarify the cause of overheating (e.g blocked motor, intake tempera-
ture too high, dirty filter); switch unit off and on again
14 Faults
14.1 All ProtecTor
14.2 AC three-phase motor with motor junction box, type ...66/76
Fault
Possible cause
Troubleshooting
Fan does not rotate when power is
applied and control signal > approx.
1.5 V DC
Mechanical blockage
Switch off, disconnect from the power supply (voltage-free) and
remove the mechanical blockage
Fan fault alarm, fault alarm contact open
Find and rectify the cause of the fault, and switch the unit off and
on again
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 VDC
Active temperature management effective (motor or electronics
overheated)
Check that the air routes are clear; remove any foreign bodies,
impeller is blocked or dirty. Check the supply air temperature and
installation location (air speed over cooling body)
Refer to the operating manual for the fan for further fault messages
14.3 EC single-phase motor with motor junction box, type ...68/78
