Transformer Coil Is Short-Circuited - Val6 KBE5L Maintenance Manual

VAL6 KBE5S & KBE5L Trouble Shooting
No. Possible Cause
Fuel is leaking
Drain packing and/or
1
bolt is defective
2 Too much fuel in the
tank
Fuse blows out
At the time of pluging into the power supply
3 Transformer coil is
short-circuited
Surge absorber(SA1)
4
on control board is
short-circuited
How to check
Remove fuel from tank
and take out a drain bolt.
Then check whether the
packing and bolt are
damaged
Check the fuel level
Disconnect transformer
connector (CN 7) from
circuit board, then
measure coil resistance
values of two leads
Standard: about 350Ω (white-red)
Standard: about 9Ω
・Without circuit tester
Disconnect transformer
connector (CN 7) from
circuit board, then put
plug into AC outlet
Measure resistance at
surge absorber (SA1)
SA1
Result
Fuel leaks because of
broken packing and/or
bolt
If either lead shows ∞Ω,
the transformer is short-
circuited
(purple-purple)
If the fuse is intact, the
transformer is short-
circuited
If resistance value is ∞
Ω, surge absorber is
short-circuited
1
Remedy
Replace a drain
packing and/or bolt
Drain excess fuel
Replace a
transformer
Replace a
transformer
Replace a circuit
board (burner
control)
1