Toyotomi Laser 300 Service Manual page 35

L A S E R H E A T I N G
Section 4
FAILURE CHECK1 RESULT
1
Does not Digital No.
operate indicator
lamp lit?
Yes.
2
Stops Does blower No.
operation motor work
and indi- when ON/
cates error OFF switch
code "E-8" is "ON"
Yes.
S Y S T E M S
Trouble Shooting
CHECK2 RESULT CHECK3 RESULT
Check if the
Check fuse Nomal Yes.
direction
insertion
and contact
terminal of
ribbon cable
is correct. No.
Melted Change fuse Yes.
and plug in
power cord
No.
Room temp.
Yes. Room temp. Yes.
exceeds set
indicates
temp?
"HI"
Yes.
No.
· Flash all on
Yes.
display
· Flash the
power LED
· Make a
beep sound
· All button
are invalid.
No beep
sound by
pressing
buttons.
Check blower
No.
motor if
blower fan
rotates
Yes.
smoothly
Is power available in wall outlet?
Is power plug inserted in wall outlet?
Has there been a power interruption?
Has circulation fan stopped?
Is fuel in tank? Tank valve open?
CHECK4 RESULT CHECK5 RESULT
Room temp. Yes.
is over 95F
No.
GENERAL CHECKS
Is ON/OFF switch on?
Is operation mode on "MANUAL"?
Is set temperature in "HIGH" position?
Is fusible link valve "OPEN"?
Is heater/fuel line/fuel tank installed properly?
CAUSE SOLUTION
Main circuit board or indicator lamp Check or replace main circuit board
circuit malfunction
or indicator lamp circuit.
Ribbon cable malfunction Check or replace ribbon cable
Fuse open Change fuse
Short circuit of lead wire Correct or change
Heater does not work at room temp.
Room temp is too high
over 95F (35C)
Incorrect wiring for room thermistor Correct wiring
Failure of room thermistor Check or replace room thermistor
Heater is on "OFF" cycle*. *This is not malfunction
Main circuit board malfunction Check or replace main circuit board
Power Button Malfunction Replace the Operation Panel
Blower motor malfunction or blower Check or replace blower motor or
fan touches to obstruction blower motor case
Disconnected or incorrect wiring Correct wiring
Blower motor malfunction Check or replace blower motor
Rotating sensor malfunction Check or replace blower motor
33
S E R V I C E M A N U A L