PAGE# 3
Operation Flowchart
MODEL:
KBE5S, KBE5L(2-step)
Remedy
No.
Possible Cause
NO
YES
●
Fuel pump is inhaling remaining air in fuel line
31
(especially brand-new heater or after refueling)
●
Pump is inhaling air from the fittings of fuel line
32
between tank and fuel pump
YES
NO
●
Fuel line is clogged
33
●
Fuel filter (element) is clogged
34
●
Nozzle is clogged
35
●
Fuel pump is clogged or defective
36
●
Fuel filter and/or nozzle is clogged by thick fuel
37
●
Nozzle is clogged
38
●
Fuel is contaminated with water
39
NO
YES
NO
YES
●
Lens of flame monitor is dirty or dusty
40
●
Poor lighting is detected by flame monitor
41
●
Flame monitor connector is loose connection
42
●
Flame monitor is defective
43
YES
NO
●
Run out of fuel
44
●
Nozzle is clogged
45
●
Fuel filter is clogged
46
●
Air intake of fuel gauge is clogged
47
Overvoltage lamp is lit
●
Overvoltage is being detected
48
Fuel is sprayed normally from
Combustion stops during the operation
(fuel drips down from the
disk or does not come out
at all)
Overvoltage lamp is not lit
Fuel pump is idling with
Misfire in about 25 seconds
(Fuel is sprayed normally from the nozzle)
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