Cleaning The Fuel Filter Or Water Block Filter; Removal Of Water Deposits And Contaminants From Fuel Sump And Fuel Lines - Toyotomi Laser 300 Service Manual

L A S E R L A S E R
Section 3
Removal of Water Deposits and
3-3 Contaminants From Fuel Sump and
Fuel Lines
Unplug the heaters from the power supply before proceeding.
1. If using an external tank on the heater, shut off the
fusible link valve and the shut-off safety valve. Also,
shut off the valve of the external tank.
2. Remove the fuel pipe from the burner and the fuel
pump, and drain the fuel into a pan.
3. Once the lines are clear, reconnect the fuel pipe,
open all valves and turn the ON/OFF switch to "ON".
Proceed with a test run.
Should problems arise during operation or ignition, use this chart to determine the cause and the proper steps to take.
Be sure to unplug heater and allow to cool completely before taking corrective measures.
In the event that heater should extinguish itself, without any action or your part, you should look to the digital indicator
for any of the following error codes.
ERROR CODE
E– 0 Power failure (low voltage,
unstable frequency)
E– 23 Primary flame (Flame sensor)
is malfunction and/or dirty
E– 6 Fuel line malfunction
E– 2 Out of fuel / no flame
E– 2 / E– 6 Flue pipe blockage or leak
E– 8 Blower motor malfunction
E– 12 High limit switch activated
E– 13 Burner thermistor failure
Flue pipe blockage or leak
E– 22 Ignition failure three times
12
S E R V I C E M A N U A L
H E A T I N G H E A T I N G
CAUSE
Check power source. (See page 36)
Consult your dealer for cleaning and in spection. (See
page 36)
Consult your dealer. (See page 34)
Check fuel gauge on fuel tank; refuel. (See page 33)
Consult your dealer. / Check flue pipe. (See page 33/34)
Consult your dealer. (See page 32)
Clean circulation fan filter and remove any obstructions,
allow your heater to cool completely and re-ignite. (See
page 35)
Consult your dealer.
Check flue pipe. / Consult your dealer. (See page 35)
Consult your dealer. (See page 35)
S Y S T E M S S Y S T E M S
NOTE:
A water block fuel filter is recommended on the
fuel line from the tank.
Cleaning The Fuel Filter or
3-4
Water Block Filter
A water block filter is recommended for installation in
the fuel line to trap condensation.
The water block filter should be checked for condensation
every 2 to 3 weeks. This is especially important in the
autumn and spring because of temperature fluctuations.
3-5 Error Message
Hi
Room temperature is over 95˚F (35˚C).
Incorrect location of room temperature sensor.
Correct the location of the room temperature sensor.
Lo
Room temperature is lower than 14˚F (-10˚C).
Room temperature sensor malfunction or
disconnected.
Check room temperature sensor.
SOLUTION
Servicing