Shizuoka Seiki VAL6 KBE5S, Service Manual

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VAL6 KBE5S Trouble Shooting
Possible Cause How to check Result Remedy Reference
Phenomenon
6
．
Smoke
comes out.
Shortage of
combustion air Check extent of
combustion air inlet
opening If combustion air inlet is
too small, it burns in
short of oxygen Extend
combustion air
inlet opening.
Normal scale: 3
Decrease of air
brought from fan Check if fan is dusty If fan is dusty, it is short
of air Clean fan
Decrease
revolutions of the
fan Measure voltage at
power source connector If voltage at power
source is lower than
standard, combustion air
is decreased because of
low voltage Check voltage
(Power source
voltage is
insufficient)
Standard: AC120V
Nozzle clogged Replace nozzle If it works normally,
nozzle was clogged Replace nozzle
Using at high
altitude area (Low
oxygen
concentration) Know the altitude If using at higher than
the altitude of 3300ft,
heater burns imperfectly
because of lack of
oxygen Extend
combustion air
inlet opening.
Normal scale: 3
Wrong nozzle Check makers imprint of
the nozzle
Mark: 0.85USgal/h 60°
H If makers imprint is
incorrect, the nozzle is
should not be used Replace to a
correct nozzle
8