E
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5.
05
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1
Troubleshooting
17
26. Troubleshooting
Observation
Cause
Remedy
Burner motor is not run-
ning
Fuse faulty
Safety thermostat locked
Controller set temperature exceeded
Control box faulty
Motor faulty
Replace
Unlock
Renewed start attempt after temperature drop
Replace
Replace
Burner starts up (does
not start up) and on
expiry of the safety inter-
val switches to fault
a) With flame formation:
Flame detector soiled, defective, not
inserted properly or not set correctly
Air sleeve not positioned correctly
Control box faulty
Recirculation volume to high
b) Without flame formation:
No ignition
No oil feed:
Valves, oil line closed
Oil tank empty
Filter dirty
Leak in oil line
Pump defective
Leak in check valve
Nozzle dirty or faulty
Solenoid valve faulty
External light
Motor–pump coupling faulty
Clean, replace, connect correctly or adjust sen-
sitivity
Correct position
Replace
Reduce recirculation volume
Check the ignition electrode and setting,
ignition transformer and cable
Open
Top up oil
Clean
Seal
Replace
Seal
Replace nozzle
Replace
see "Checking the operation of the flame moni-
tor control unit"
Replace
Flame extinguished dur-
ing operation
No oil
Nozzle filter blocked
Oil filter or oil feed lines dirty
Entrapped air
Solenoid valve faulty
Add oil
Replace nozzle
Clean filter and line
Check suction line and fittings
Replace
Mixing unit is heavily
fouled by oil or is heavily
coked
Incorrect setting
Wrong nozzle size
Combustion air flow rate is incorrect
Boiler room is not sufficiently ventilated
Correct the setting dimensions
Replace
Readjust burner
Make sure that the ventilation orifices are large
enough