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2.55
ProtecTor
A new dimension in door screening
Installation and operating manual
14 Faults
14.1 All ProtecTor
Fault
Impeller not running concentrically
Air flow is not warm in heating
mode
Fan is not moving any or too little
air
Water outlet
Unit too loud
14.2 AC three-phase motor with motor junction box, type ...66/76
Fault
Fan does not rotate when motor is
switched on and standby light on
Fan does not rotate when motor is
switched on and standby light is off
14.3 EC single-phase motor with motor junction box, type ...68/78
Fault
Fan does not rotate when power is
applied and control signal > approx.
1.5 V DC
Fan does not rotate 100 % at max.
control signal 10 VDC
Refer to the operating manual for the fan for further fault messages
48
Possible cause
Imbalance of rotating parts
Insufficient heating medium
Air in the heat exchanger
Air flow is interrupted or disrupted e.g. by dirty filter or dirty heat
exchanger
Wrong direction of rotation
Fault on the heat exchanger
Hydraulic connection not properly done
Fan speed too high
Air intake / air discharge opening obstructed
Possible cause
Setpoint temperature too low
Door contact has switched off
No power supply to unit
No control voltage
Cable connection broken
Fan thermal contact has been triggered (overheating risk)
Possible cause
Mechanical blockage
Fan fault alarm, fault alarm contact open
Control voltage poles switched
Temperature monitor has responded
Active temperature management effective (motor or electronics
overheated)
Troubleshooting
Clean the unit, replacing the unit if there is still imbalance after
cleaning.
Please make sure that no balancing brackets are removed during
cleaning.
Check heating medium (heating circuit, boiler) and remedy fault
Vent heat exchanger
Restore a clear air passage, change the filter and / or replace the
heat exchanger
Check the direction of rotation of the fan
Replace the heat exchanger if you need to
Check supply and return and tighten, if necessary
Select a lower fan speed, if possible
Clear air route
Troubleshooting
Raise setpoint
Check door contact, insert jumper if necessary
check fuses in sub-junction box
Check control fuse in switch unit
Check cable connections
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
Troubleshooting
Switch off, disconnect from the power supply (voltage-free) and
remove the mechanical blockage
Find and rectify the cause of the fault, and switch the unit off and
on again
Correctly connect control voltage
Allow the motor to cool down, find and rectify the cause of the
fault and trigger automatic restart lock if necessary
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)
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