Motor failure
Condition
Possible cause
Action
Fan or oil pump motor does not
start. Lockout occurs.
Break in main circuit
Find out cause of the break.
Motor overload relay released
Check setting, reset.
Faulty motor contactor
Change.
Faulty motor
Change.
Break in control circuit
Find out cause of the break, see
circuit diagram. Check burner
control operation. Replace faulty
burner control.
Flame does not form, fault code 6, 9, 10
Condition
Possible cause
Action
Oil use:
Fan motor starts, ignition is in
order. After a short period of time
lockout occurs.
Solenoid valve does not function.
Cause: faulty solenoid valve or
coil.
Replace faulty part.
Solenoid valve does not function.
Cause: damaged cable.
Replace faulty part.
Solenoid valve does not function.
Cause: faulty burner control
Fault code 921
Replace faulty part.
Too low ignition load
Check.
Too large air amount
Adjust.
Too high pressure loss in
combustion head
Adjust.
Nozzle does not spray.
Too low atomizing pressure
See section
Oil pump
Lockout occurs after flame establishment
Condition
Possible cause
Action
Flame forms. Occurs lockout and
restart. Fault code 611
Gas pressure too low because of
an inoperative pressure regulator.
Repair or change regulator.
Gas pressure too low because
min. gas pressure switch released.
Check operation and regulations.
Blocked filter
Clean or repair filter.
Oil use:
Flame forms. Flame extinguishes
and lockout occurs when burner
runs to full load. Fault code 4.
Incorrect burner adjustment
Adjust.
Clogged nozzle
Change.
Oil use – oil leaks to combustion chamber
Condition
Possible cause
Action
Oil leaks to combustion chamber
during idle time.
Solenoid valves do not close.
Clean, repair or replace.
Oil leaks to combustion chamber
during start-up.
Leaking valves
Clean, repair or replace.
90 (95)
M5164 1640EN
Summary of Contents for GKP-50 MH
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