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VAL6 KBE5S & KBE5L Trouble Shooting
No.
Possible Cause
How to check
Result
Remedy
16
Circuit board (Burner
control) is defective
Measure voltage at input
side of transformer
connector (CN 7)
If power source is
normal and tester reads
0V at input side, circuit
board is defective
Replace circuit
board (burner
control)
17
Terminals of control
device is uncoupled
Check whether the
terminals for control
device are connected
firmly
Firmly connect
terminals on control
device
18
Direct sunlight hits
flame monitor
If it starts, sunlight is
detected by flame
monitor
Move disk away
from direct sunlight
or bright light source
19
Circuit board (Burner
control) is defective
If it doesn't start, circuit
board is defective
Replace a circuit
board
20
Over voltage is being
detected
Change the power source
or confirm whether the
voltage of power source
or generator is correct
Find a cause of over
voltage and take
away them
21
Combustion fan
connector is loose
connection
Plug combustion fan
connector (CN 13) again,
and then turn on
If it works normally,
combustion fan
connector fails on contact
Plug connector
(CN13) firmly
22
Combustion fan motor
is clogged
Try to rotate a vane by
hand (*Be sure to plug
off beforehand)
If a vane isn't rotated
smoothly or completely,
the combustion fan is
clogged
Replace a
combustion fan
23
Combustion fan and/or
circuit board (Burner
control) is defective
Refer to above #21 & 22 There is no cause in #21
& 22, combustion fan
and/or circuit board are
defective
Replace a
combustion fan
and/or circuit board
Overvoltage lamp is not lit (Operation lamp and misfire lamp are lit)
Unplug flame monitor
connector (CN11), then
turn on switch
All three(operation, misfire, over voltage) lamps are lit
Combustion fan does not run
Standard: AC120V (white-red)
Misfire lamp is not lit (Only operation lamp is lit)
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