250DV
- 27 -
03.27988.000
6. Troubleshooting
possible cause
possible remedy
(*) = must be carried out by
qualified engineer
x High tension lead loose
Check connection (*)
x HT lead shorting out on burner body Establish where spark is occuring and
insulate or re-route lead accordingly (*)
x Electrode broken
Replace electrode (*)
x Faulty piezo-igniter
Replace piezo (*)
x No gas
Open gas supply
x Air in tubes
Be patient until air is replaced by gas
x x Gas pressure too high
Re-adjust supply pressure or call gas -
supply company (*)
x x Gas pressure too low
Check for possible obstruction of gas
supply tube, re-adjust supply pressure
or call gas -supply company (*)
x x x Pilot jet or tubing blocked
Clean tubes or pilot jet (*)
x Incorrect pilot jet
Place correct pilot jet (*)
x Thermocouple insufficiently hot
Wait a moment to heat thermocouple
x x Thermocouple not in pilot-flame
Put thermocouple in correct position(*)
x Sooting of thermocouple
Clean thermocouple
x x Faulty thermocouple
Replace thermocouple (*)
x x Faulty safety valve
Replace safety valve (*)
x x Blocked tubing or burner jet
Clean tubes and burner jet (*)
x Burr on burnet jet
Remove burr (*)
x Partly blocked burner
Clean burner (*)
x Gas leak
Look up leak and rectify (*)
x x Blocked vent system
Control and clean (*)
x Appliance is leaking
Look up and rectify (*)
x Dust on appliance
Remove dust
symptom
Piezo operates normally but pilot will not light
No spark
Pilot light goes out when releasing ignition button
Main burner will not burn
Whistle noise between low and high fire
Flames irregular height
Smell of gas
Smell of unburnt gases in room
Fire goes out
