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English
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14.2. Fault diagnosis chart
If a fault occurs on the unit, one or more fault messages will appear on the display. A fault is ack
-
nowledged with button B (▲). It is not possible to use the control unit until all of the faults have been
removed and acknowledged. Depending on the priority of the fault, the installation will either switch
off or continue working with the last settings.
The following faults might be shown on the display:
Faults displayed
Type of fault and repair
ERROR
»
The control unit has no reception.
»
Check the connection or replace the cable if necessary.
Supply air temperature sensor fault
»
The supply air temperature sensor is defective or the cable is broken.
»
Replace the defective temperature sensor or replace the broken cable if necessary.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Room temperature sensor fault.
»
The room temperature sensor is defective.
»
Replace the remote control unit.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Extracted air temperature sensor fault.
»
The extracted air temperature sensor is defective or the cable is broken.
»
Replace the defective temperature sensor or replace the broken cable if necessary.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Exhaust air temperature sensor fault.
»
The exhaust air temperature sensor is defective or the cable is broken.
»
Replace the defective temperature sensor or replace the broken cable if necessary.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Outside air temperature sensor fault.
»
The outside air temperature sensor is defective or the cable is broken.
»
Replace the defective temperature sensor or replace the broken cable if necessary.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Error frost protection
»
The air temperature has fallen below the value set on the antifreeze thermostat.The fans will be switched off, the
air flaps closed, the heating valve fully opened and the circulating pump switched on.
»
Check fuse F2.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Fault in the safety thermostat - electric heating element temperature monitoring
»
The housing temperature is higher than 75 °C. The control circuit is broken, the electric heater is switched off.
Possible cause: defective supply air valve, fan has failed, etc.
»
Repair supply air valve, check fuses F2.
»
Once the cause of the fault has been removed, the reset button on the safety thermostat (see Fig. 19/20) must be
reset manually and the fault must be acknowledged on the control unit with button B (▲) .
Fault, fan thermal contact
»
The thermal contact has been tripped, device will be switched off. Possible cause: motor overheating or defective.
»
The power supply must be switched off at the main switch for at least 20 s. Check fuse F2, replace the motor if
necessary.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Error fan
»
A signalling relais of a fan has been tripped.
»
Switch the unit off, check wiring and fans and if needed, replace damaged fan.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Fire protection signal
»
The fire protection contact is open. The fire detector has tripped.
»
After removing the cause of the fire detection, the fault must be acknowledged with button B (▲).
Insufficient temperature of supply air
»
The maximum set supply air temperature (12 °C) was undershot longer than 30 minutes.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
Excess temperature, supply air
»
The maximum supply air temperature of 80 °C was exceeded longer than 10 sec. or the cable of the air supply
temperature sensor is broken.
»
Switch off the device, check fans.
»
After removing the cause of the fault, the fault must be acknowledged with button B (▲).
No release
»
The release contact is not closed.
»
Close the release contact. The unit can then be started.
ERR
F1 FAULT
SUPPLY AIR TEMP
F2 FAULT
ROOM TEMPERATURE
F3 FAULT
EXTRACT AIR TEMP
F4 FAULT
EXHAUST AIR TEMP
F5 FAULT
EXTERN AIR TEMP
F7 FAULT
FROST PROTEC
F8 FAULT
SAFTY THERMOSTAT
F9 FAULT
FAN TEMP
F10 FAULT
FAN
F14 CONTACT
FIRE PROTECTION
F18 FAULT
TEMP.HIGH.SU.AIR
NOT ENABLE
F17 FAULT
TEMP.LOW SUP.AIR
Summary of Contents for ETA K 1200 V W
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