Installation-Operation-Maintenance
GZ 2 - GZ 4 / 100 - 1450 kW
16
Fault
Cause
Remedy
Burner starts up,
automatic device shows fault
during pre-venting
Air pressure switch contact opens
Flame signal
Check pulse lead
Check ionisation current [fault current?]
(GZ 2 + GZ 4)
check infrared flicker detector IRD (GZ 3)
Burner starts up,
automatic device shows fault
during safety period
No flame formed (lacking ignition, valve does
not open, etc.)
No or weak ionisation current
(GZ 2 + GZ 4)
No or weak flame signal (GZ 3)
[Flame does not hold, poor insulation of flame
sensor, burner not correctly connected to earth
conductor]
Check pulse lead
Check ionisation current [fault current?]
(GZ 2 + GZ 4)
check infrared flicker detector IRD (GZ 3)
Burner starts up,
automatic device shows fault
during operation setting
Flame breaks off
Air pressure switch contact opens
Ionisation current too low (GZ 2 + GZ 4)
Flame signal too low (GZ 3)
Check pulse lead
Check ionisation current [fault current?]
(GZ 2 + GZ 4)
check infrared flicker detector IRD (GZ 3)
Safety warning!
The mains voltage must be switched off
and the main stop valve in the gas pipe closed
whenever any kind of work is being performed
to the burner and switchboard
