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Fault Diagnosis
Symptom Check
List Tick
Check remote handset is working properly and battery is
charged
Check power supply has not been switched off
Check fuses in spur
Unit does
not respond
Check wiring is correct on fire and hardwire switch
Check battery power
Remote
handset
does not
work
Check remote eye is visible and facing in the correct
position
Check switch is wired properly
Hardwire
manual
switch does
not work
Check hardwire switch’s green block is wired correctly
Check spark lead is connected properly
Unit clicks
but no
spark or
weak spark
Check spark electrode is in the correct area and the gap
correctly distanced
Check for a good spark
Check the spark is in the right area
Unit sparks
but does not
light pilot
Check the ventilation is not too strong and the flame is not
blowing off the thermocouple
Check isolation tap/shut off valves are free from grease
Check isolation tap/shut off valve are on
Check for blockages
There is no
gas
Check gas working pressure is correct:
Check gas working pressure is correct:
Check for blockages in pipes
Check for draughts which can reduce pilot flame
There is gas
but pilot
does not
light
Check the pilot gas slot is clear of debris
Check the pilot flame is heating the thermocouple and there
is a draft shield fitted if required
Check the thermocouple nut is properly tightened into the
valve/interrupter block
Check that the pilot lights early on ignition clicks
Check ventilation is not too strong and the flame is not
blowing off the thermocouple
Pilot lights
but does not
light main
burner
Check gas working pressure is correct: NG – 20mBar, LPG
37mBar
Check thermocouple nut is properly secured to the
interrupter block on the valve and flame failure device is
operating correctly
Check ventilation is not too strong and the flame is not
blowing off the thermocouple
Burner
lights but
turns off
after a few
minutes
Check gas working pressure is correct:
