IPC failure
Change device High priority
Device switches off.
Device defective Have device repaired
Sensor system failure
Change device High priority
Device switches off.
Sensor system defective Have device repaired
System monitoring
failure
Low priority
Voltage monitoring
failure
Have device repaired
No power supply
Low priority Power supply failed
Keep alternative ventilation
option to hand. Check power
cord is firmly connected. If
necessary, check the function
of the socket by connecting a
different device (e.g. a lamp)
Blower failure
Change device High priority
Device switches off.
Device defective Have device repaired
CPU failure
Change device High priority
Device switches off.
Internal processing
faulty, device defective
Have device repaired
I
2
C failure
Medium priority Device defective Have device repaired
Warning: Device
switched off!
High priority
Device has been
switched off
Turn the device on again
Acknowledge alarm
Unknown device
High priority Device defective Have device repaired
Display Alarm Cause of fault Remedy