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20039847GB
11. Fault Conditions and Procedures
In the event of fault conditions the basic requirements for correct operation must be first
examined:
1. Check the electric supply (control voltage).
2. Check that all control devices are correctly set.
3. Are the safety devices in normal operating condition?
4. Is the burner getting fuel, are the valves in fuel line open, is there oil in the tank?
When it is established, that the fault is not due to above mentioned, the individual burner
functions must be checked. Reset the burner control unit if it is in lockout position (signal lamp
lights). Burner starts. Observe the burner functions. Measuring instruments can be used for
finding of the fault.
CAUTION
POSSIBLE CAUSE
REMEDY
1.
Motor
Burner motor does not start Break in motor control circuit:
- faulty control unit
- faulty preheater (”LH” burners)
- faulty air damper servomotor
(”H” burners)
- incorrect setting on cam disc of
the servomotor (”H” burners)
Faulty motor
Find cause and remedy
Replace control unit
Replace
Replace
Correct setting
Replace
2.
Ignition failure
Burner motor starts, control
voltage from control unit to
ignition transformer is
switched on, no ignition and
after a short time lockout
occurs.
Dirty or worn ignition electrodes,
insulator cracked
Incorrect position of ignition
electrodes
Damaged ignition cable
Faulty ignition transformer
Clean or replace
Adjust according to instructions
Replace
Replace
3.
No flame establishment
Burner motor starts, ignition
is in order, after a short time
lockout occurs.
Solenoid valve does not function:
- faulty solenoid valve or coil or
cable damaged
- faulty control unit.
Main solenoid valve does not
function:
- incorrect setting on cam disc of
the servomotor
Replace faulty part
Correct setting
Nozzle supplies no oil
Oil atomising pressure too low
Blocked or worn nozzle
See section ”Oil pumps”
Clean or replace
