Toyotomi Laser 300 Service Manual page 36

L A S E R H E A T I N G
Section 4
FAILURE CHECK1 RESULT
3
Stops Does ignite? Yes.
operation
and
indicates
error code
"E-2"
No.
S Y S T E M S
Trouble Shooting
CHECK2 RESULT CHECK3 RESULT
Does flame No.
rod sensor
work
properly?
Yes.
Is igniter red? Yes. Does fuel Yes.
Check pump work?
visually
through the
combustion
chamber
viewing
window
No.
Ia there
Yes. Yes.
120V at "G"
pins on
circuit
No.
board?
CHECK4 RESULT CHECK5 RESULT
Check for No.
water in
fuel
Yes.
Is there
Yes.
DC161V at
"A" pins
No.
(between
black and
orange) on
circuit
board?
CAUSE SOLUTION
Flame rod sensor touches burner
Correct or change flame rod sensor
parts
Carbon built up on the flame
Check and clean flame rod sensor
rod sensor
Disconnected or incorrect wiring Check and correct wiring
Fuel flow too little Check or replace fuel pump
Straighten fuel line to remove air
Air lock in fuel line
pocket or correct fuel line installation
Clogged fuel nozzle Check and clean fuel nozzle
Push fuel constant level valve reset
Fuel not entering into fuel pump
button
Check or replace fuel constant level
Malfunction fuel constant level valve
valve
Fuel nozzle is clogged Clean fuel nozle
Fuel not fed because of surface
tension of water
Discharge water
Water gathering in fuel tank
Fuel pump malfunction Check or replace fuel pump
Wiring failure Correct or replace wires
Main circuit board malfunction Check or replace main circuit board
lgniter malfunction**
-lgniter malfunction may cause by water Check or replace igniter
in the fuel check for the water in fuel
Main circuit board malfunction Check or replace main circuit board
34
S E R V I C E M A N U A L