Val6 KBE5L Maintenance Manual page 4

Operation Flowchart
Misfire lamp is lit
YES
(for KBE5L)
(for KBE5S)*1
Overvoltage lamp is lit
YES
all three lamps are lit
Combustion fan is running
YES NO
Electrode is sparking
YES NO
The heater ignites
YES NO
Fuel pump does not turn on
YES
MODEL:
NO
NO
NO
KBE5S, KBE5L(2-step)
Possible Cause
●
Terminals of control device is uncoupled
*1 KBE5S manufacturered from 2006 to
2013(Serial# J-04 to D-05)
Direct sunlight hits flame monitor
●
● Circuit board (burner control) is defective
Overvoltage is being detected
●
●
Combustion fan connector is loose connection
●
Combustion fan motor is clogged
● Combustion fan and/or circuit board (burner
control) is defective
Ignition transformer connector or high-voltage
●
cord is loose connection
Electrode is defective
●
●
Ignition transformer is defective
（crack in high-voltage cord）
●
Circuit board (Burner control) is defective
Fuel pump connector is loose connection
●
● Fuel pump is defective
●
Circuit board (Burner control) is defective
PAGE# 2
Remedy
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