Leakage test failure
Condition
Possible cause
Action
Leakage test failure
Gas block failure
See section
Gas valve proving
.
Gas inlet pressure to burner too
low
Find out cause and repair.
Faulty pressure switch
Change.
Faulty gas valve
Change.
No ignition spark
Condition
Possible cause
Action
Fan motor starts, control voltage
from burner control to ignition
transformer is switched on, no
ignition spark is formed, and after
a short time lockout occurs.
Dirty or damaged ignition
electrodes.
Clean or change.
Ignition electrodes too far apart.
Adjust electrodes according to
instructions in section
Adjusting
combustion head
.
Damaged or disconnected ignition
cable.
Change.
Faulty ignition transformer.
Change.
Faulty oil pump
Condition
Possible cause
Action
Oil pump motor does not start
Break in main circuit
Find out cause of the break, repair
Motor overload relay released
Check setting, reset
Fuse released
Tune or replace
Faulty motor contactor
Replace
Faulty motor
Replace
Faulty oil pump output.
Change burner control.
No oil supply or too low atomizing
pressure.
Dirty filter
Clean or replace.
Leaking transfer pump suction line Fix leakage.
Pump capacity decreases. Faulty
or worn-out pump.
Change.
Loud mechanical noise.
Pump is sucking air.
Tighten joints.
Too low inlet pressure to pump.
Clean filter. Check and adjust
pressure.
Premature flame establishment, oil use
Condition
Possible cause
Action
Burner motor starts then lockout
(long ignition)
Faulty solenoid valve or leaking
nozzle valve.
Clean or change valve.
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M5178 1647EN
Summary of Contents for GKP-350 M
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