7
VAL6 KBE5S & KBE5L Trouble Shooting
No.
Possible Cause
How to check
Result
Remedy
37
Fuel filter and/or
nozzle is clogged by
thick fuel
Because of low
temperature, fuel
viscosity increase and
fuel filter and/or nozzle is
clogged
Warm the fuel or
mix kerosene with
diesel.
(Replace a filter
and/or nozzle if
38
Nozzle is clogged
Replace a nozzle
Clean and flush the
tank with kerosene,
alcohol or acetone
39
Fuel is contaminated
with water
Because of condensation,
there is the dew
condensation water in the
tank
Replace a fuel
thoroughly
40
Lens of flame monitor
is dirty or dusty
Take a flame monitor
out, and check whether
its lens is clear or not
If it is dirty or dustiness,
flame monitor cannot
detect flame properly
Clean the lens of
flame monitor with
soft cloth
41
Poor lighting is
detected by flame
monitor
Remove a burner and
check whether the whirl
vane and inside of draft
tube are clear or not
If they are dirty or
dustiness, flame monitor
cannot detect flame light
properly
*usually this will be
happen with above #42
at once
Clean the whirl vane
and inside of draft
tube or replace a
vane
*clean the lens of
flame monitor
42
Flame monitor
connector is loose
connection
Plug flame monitor
connector (CN11) again,
and then turn on
If it works normally,
flame monitor connector
fails on contact
Plug connector
(CN11) firmly
Misfire in about 25 seconds after ignition
(Fuel is sprayed normally form the nozzle)
Combustion stops during the operation
draft tube
whirl vane
Cleaning the whirl
vane and inside of
Clean the whirl vane and
inside of draft tube
(especially behind whirl
vane) till they are shining
7
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