17
5.
Clean Fuel Strainer (ONCE A SEASON)
The strainer of the fuel sump should be cleaned once a season and before
starting the heater at the beginning of each season.
(a) Close the valve closest to the heater.
(b) To catch the fuel which will drain out, set the Oil catch below the Strainer
cover, with a small container under it.
(c) Loosen the two screws from the Strainer cover and remove.
(d) Remove the strainer and wash with kerosene or fuel oil.
(e) Return the strainer to its original position. Replace strainer cover and screw
to secure.
(f) Wipe away any spilled fuel.
(g) Open the valve in the fuel line. Check for fuel leakage.
Note: At the end of each season unscrew the drain screw to remove all the remaining fuel from the fuel
sump. Be sure to follow procedure A and B listed above and replance Drain screw.
6.
Recommended Periodic Maintenance
As a state-of-the-art furnace, your heater requires periodic inspection and service by an authorized technician
to insure optimum, trouble free performance. This inspection should include: a combustion check; flue pipe
check; burner assembly check; cleaning all necessary parts and replacing gaskets as needed. Please ask
your authorized Toyotomi dealer for details and scheduling. When using Ultra Low Sulfur Diesel (ULSD) or
Ultra Low Sulfur Heating Oil the heater should be serviced at least every two years because the distillation of
ULSHO is heavier than 1-K Kerosene and No. 1 Fuel Oil. When using 1-K Kerosene or Low Sulfur No. 1 Fuel
Oil your heater can be serviced less frequently.
AUTOMATIC IGNITER CLEANING SYSTEM
When the heater is on and clock is set (see “set Clock” on page 9), it will automatically stop and clean the igniter
every day at 2:00 AM and will display “CL” on the Display. After the cleaning mode is finished the heater will
automatically re-ignite and continue to burn again.
The igniter cleaning mode helps prolong the igniter life.
MANUAL IGNITER CLEANING SYSTEM
Heater will clean igniter for ten (10) minutes manually.
1. When ON/OFF switch is “OFF”, press the “SET” button and “CLEAR” button at the same time for more than
three (3) seconds.
2. Display will appear “CL:10” on Display. Cleaning will begin and end without any additional input.
Note: Cleaning igniter is important to prolong igniter life. It is recommended that the igniter be cleaned once a
month if the time is not set.
Oil catch
Fuel
Strainer
Strainer
gasket
Strainer
cover
Drain
Screw
The following symptoms are normal during operation of the heater.
White smoke or smell at initial use after
purchase.
Flames flashing for a few minutes after
ignition.
Occasionally makes “cracking” noise when
heater is ignited or extinguished.
Part of the heat chamber or the heat
exchanger is heated to a cherry red color.
Warm air will not blow as soon as ignited.
Audible chugging sound from fuel pump
when started first time or after running out
of fuel.
“Ticking” noise.
Machine oil or dust burns off of the surfaces the
surfaces of the burner or heat exchanger.
The burner is cold and igniter is kept running
for a while after ignition.
Expansion and shrinkage of metal parts when
they are heated or cooled.
To prevent uncomfortable cool air from
coming out at the beginning, the circulation fan
start up is delayed.
Air is in the pump. However, noise should
stop within 1 minute.*
Noise of fuel pump in operation.
Normal.
Normal.
Occasional yellow flickering in blue flame.
Normal.
When heater is started
or extinguished.
When heater is
in operation.
CONDITION
REASON
NOTE BEFORE REQUESTING FOR REPAIR AND SERVICES
ERROR CODE
E– 0
E– 23
E– 6
E– 2
E– 2 / E– 6
E– 8
E– 12
E– 13
E– 13
E– 22
CAUSE
Power failure (unstable frequency)
Primary flame (Flame sensor) is
malfunction and/or dirty
Fuel line malfunction
Out of fuel / no flame
Flue pipe blockage or leak
Blower motor malfunction
High limit switch activated
Burner thermistor failure
Flue pipe blockage or leak
Ignition failure three times
SOLUTION
Check power source.
Consult your dealer for cleaning and in
spection.
Consult your dealer.
Check fuel gauge on fuel tank; refuel.
Consult your dealer. / Check flue pipe.
Consult your dealer.
Clean circulation fan filter and remove any
obstructions, allow your heater to cool
completely and re-ignite.
Consult your dealer.
Check flue pipe. / Consult your dealer.
Consult your dealer.
*If sound from fuel pump does not decrease and heater shuts off, check:
1. Push red float release button on fuel sump once. DO NOT hold down.
2. Insure that all valves are open and filter is clear.
3. Insure external fuel tank has fuel and filters are clean.
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 Display for
any of the following error codes.
SECTION G:
TROUBLESHOOTING
Summary of Contents for Laser 531
Page 35: ......
