Val6 KBE5L Maintenance Manual page 6

Operation Flowchart
Combustion is stable
YES NO
Combustion level can switch into High/Low
(for KBE5L 2-step only)
YES NO
Smoke comes out
NO YES
Smoke is continuous
YES
Which color is the smoke?
Black White
Heater is using in high altitude
YES
MODEL:
NO
NO
gives off black
smoke
KBE5S, KBE5L(2-step)
Possible Cause
● Nozzle is clogged
●
Fuel pump is clogged or defective
●
Change-over switch connector is loose connection
●
Change-over switch is defective
Fuel viscosity is increasing
●
Fuel viscosity is increasing
●
●
Nozzle is clogged
●
Combustion air is insufficient
Oxygen for combustion is low because of high
●
altitude
PAGE# 4
Remedy
No.
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