33
20039847GB
CAUTION
POSSIBLE CAUSE
REMEDY
4.
Oil pump
Supplies no oil or atomising
pressure is too low
Dirty filter
Leaking suction line
Pump capacity decreases:
- faulty or worn pump
Clean
Seal
Replace
Nozzle supplies no oil
Valve does not open to the
nozzle:
- solenoid valve (pump AS 47 C)
does not close
- solenoid valve (other pump
types) does not open
Replace solenoid valve coil or
pump
Severe mechanical noise
Pump sucks air
Vacuum in oil piping too high
Tighten joints
Clean filter
Check size of suction line
5.
After flame establishment lock-out
Flame forms. When burner
runs to stage 2, lockout
occurs and then re-start
(H-burners).
Incorrect burner adjustment
Dirty filters
Blocked nozzle
Faulty solenoid valve
Correct adjustment
Clean
Replace
Replace
6.
Premature flame formation
Burner motor starts, then
lockout occurs.
Leaking valves
Clean or replace
7.
Flame monitoring fault (=lock-out)
Burner motor starts, flame
forms, then lock-out occurs
Incorrect position of flame
detector
Dirty flame detector
Too weak flame (illumination)
Faulty flame detector
Faulty control unit
Correct
Clean
Check burner adjustments
Replace
Replace
Lock-out during pre-purge
period
Faulty flame detector
Faulty control unit
Replace
Replace
