WZA
School ventilation
Assembly, installation and operating instructions
34
12
Faults
The following chapter describes possible causes of faults and the work needed to rectify them. Should faults occur frequently,
shorten the maintenance intervals in line with the actual loading on the unit.
Contact the manufacturer with any faults that cannot be rectified using the following information.
Behaviour in the event of faults
The following applies:
1. Immediately switch off the unit with faults that pose an immediate danger to persons or property!
2. Determine the cause of the fault!
3. Switch off the unit and prevent it from being reconnected if rectifying the fault requires work in the hazard area. Immedi-
ately advise a supervisor on site about the fault.
4. Either rectify the fault yourself or have it repaired by authorised personnel, depending on the nature of the fault.
The
provides information on who is authorised to rectify and remedy faults.
12.1 Fault table
Fault
Possible cause
Remedy
No function.
No power supply
Check the voltage.
Replace fuse.
Solo key flashes yellow.
Filter differential filter exceeded.
Replace the filter.
Solo key flashes red.
Fan fault.
Call up the fault in the dashboard and replace
the fan.
12.2 Start-up after rectification of fault
After correction of the fault, carry out the following steps for recommissioning:
1. Make sure that all maintenance covers and access openings are sealed.
2. Connect to the power supply.
3. Acknowledge the fault on the controller, if necessary.