Poor combustion
CONDITION
POSSIBLE CAUSE
ACTION
Poor oil atomizing.
Oil atomizing or return pressure
too low.
Check and adjust.
Nozzle spraying angle incorrect.
Try nozzle with a different
spraying angle.
CO-content is too high or smoke
number too high.
Pressure drop in combustion head
too low.
Adjust pressure drop.
Incorrect diffuser disc location.
Adjust diffuser disc.
Diffuser disc burned out
Too low combustion air velocity:
incorrect adjustment ring position
Adjust, change diffuser disc if
necessary.
Too low partial load
Adjust, change diffuser disc if
necessary.
Incorrect distance between nozzle
and diffuser disc
Adjust.
Oil use:
Oil or heavy carbon deposits
inside of boiler furnace.
Incorrect nozzle type or size
Change.
Incorrect oil temperature setting.
Adjust.
Incorrect atomizing or return
pressure.
Adjust.
Worn-out nozzle
Change.
Leaking nozzle valve.
Change.
6.13 Troubleshooting error codes
See complete fault code list from manufacturer manual
Fault codes
Code
Diag
Description
1E
XX
Servomotors do not reach pre-purge or ignition position. Faulty servomotor.
2F
XX
Low gas pressure. Flame forms. Lockout and re-start occur.
1F, 2A, 29
XX
Motor failure.
5
XX
Faulty flame detector.
21
XX
Safety loop open.
22
XX
Temperature limiter released.
23
XX
Lockout during pre-purge.
24
XX
Lockout during shutdown.
25
XX
Flame does not form
26
XX
Fan motor starts, flame forms then lockout occurs. Flame monitoring fault.
27, 28
XX
Faulty differential air pressure.
28
XX
Lack of air pressure
31, 32
XX
Leakage test failure
34
XX
No oil supply or too low atomizing pressure. Faulty oil pump.
35
XX
Main solenoid valve does not open. Return oil pressure too high.
M5178 1647EN
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Summary of Contents for GKP-350 M
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