Shizuoka Seiki VAL6 KBE5S, Service Manual

Page: 10 / 21

VAL6 KBE5S Trouble Shooting
Possible Cause How to check Result Remedy Reference
Phenomenon
4
．
Combustion
stops during
Misfire lamp
is lit.
Air leak Check looseness of each
joint If heater ignites by
tightening joints, air leak
is the problem Fasten joints more
tightly
Insufficient
amount of
pumping fuel
because vacuum
forms in tank Check if air intake of
fuel gauge is clogged
with dust If air intake of fuel
gauge is clogged,
amount of fuel flow
becomes insufficient
because of vacuum Clean air intake of
fuel gauge
Picture 10
Shortage of light
detected by flame
monitor Take flame monitor out,
and then check clarity of
its lens If lens of flame monitor
is dirty, it detects a little
light Wipe lens of
flame monitor
with soft cloth
Remove burner, and
then check clarity of
draft tube and vane If draft tube or whirl
vane is dirty, flame
monitor detects little Clean draft tube
and whirl vane
Picture 7
Flame monitor
connector is loose
connection Plug flame monitor
connector (CN 11)
again, and then turn on If it works normally,
flame monitor connector
fails on contact Plug connector
(CN 11) firmly
Failure of flame
monitor Unplug flame monitor
connector (CN 11), and
then check transition of
resistance by changing
quantity of light into
flame monitor If resistance doesn't
change, flame monitor
fails Replace flame
monitor
Nozzle clogged Replace nozzle If it works normally,
nozzle was clogged Replace nozzle
Filter clogged Check clarity of filter If filter is dirty, fuel
flow decreases because
of clogged filter Clean or replace
filter
6