11
VAL6 KBE5S & KBE5L Trouble Shooting
No.
Possible Cause
How to check
Result
Remedy
58
Combustion air is too
much
Check whether air inlet
opening for combustion
is appropriate
If air inlet opening if too
much, imperfect
combustion occurs
Narrow an air inlet
opening
Normal scale: 3
59
Nozzle is clogged
Replace a nozzle
Clean and flush the
tank with kerosene,
alcohol or acetone
60
Fuel filter (element) is
clogged
Check with eyes whether
or not the fuel filter is
dirty or fouled
Replace a fuel filter
61
Nozzle is incorrect
Check whether correct
nozzle is used
Mark: 0.85USgal/h 60°H
Replace a correct
nozzle
62
Combustion air is
insufficient
Check whether a
combustion fan is run
(refer to #21, 22, 23)
If the combustion fan
does not run, imperfect
combustion occurs by
low oxygen
Replace a
combustion fan
and/or circuit board
Check whether vanes of
combustion fan are dusty
If vanes are dusty,
imperfect combustion is
occurs by low oxygen
Clean a vanes of
combustion fan
Check whether air inlet
opening for combustion
is appropriate
If opening is small,
imperfect combustion
occurs by low oxygen
Adjust a air inlet
opening
Normal scale
：
3
Check whether applied
voltage is normal
Standard: 120V±10%
If applied voltage is
lower than 108V,
imperfect combustion by
decreasing of combustion
fan rotation speed occurs
Find a cause(s) of
low voltage and
solve it
* or plug into
another outlet
63
Oxygen for
combustion is low
because of high
altitude
Check whether the heater
is opearting in an altitude
higher than 1000m
If its altitude is higher
than 1000m, imperfect
combustion occurs by
low oxygen environment
Expand an air inlet
opening gradually
until smoke is clear
away
Normal scale: 3
Smell of fuel comes out
Flame bounces out from the disk
Heater is using in high altitude
11
All manuals and user guides at all-guides.com
