PAGE# 2
Operation Flowchart
MODEL:
KBE5S, KBE5L(2-step)
Remedy
No.
Possible Cause
YES
NO
●
Terminals of control device is uncoupled
17
YES
NO
●
Direct sunlight hits flame monitor
18
●
Circuit board (burner control) is defective
19
all three lamps are lit
●
Overvoltage is being detected
20
YES
NO
●
Combustion fan connector is loose connection
21
●
Combustion fan motor is clogged
22
●
Combustion fan and/or circuit board (burner
23
control) is defective
YES
NO
●
Ignition transformer connector or high-voltage
24
cord is loose connection
●
Electrode is defective
25
●
Ignition transformer is defective
26
（
crack in high-voltage cord
）
●
Circuit board (Burner control) is defective
27
YES
NO
YES
NO
●
Fuel pump connector is loose connection
28
●
Fuel pump is defective
29
●
Circuit board (Burner control) is defective
30
*1 KBE5S manufacturered from 2006 to
2013(Serial# J-04 to D-05)
Combustion fan is running
Overvoltage lamp is lit
Misfire lamp is lit
Electrode is sparking
The heater ignites
Fuel pump does not turn on
(for KBE5L)
(for KBE5S)*1