Question about Rinnai Toyostove Direct Vent Heater: Laser 30 Toyostove Direct Vent Heater Shipping

2 Answers

EE2 code on cold start

I resently changed my filter and cleaned the fuel screen and even cleaned out the fuel bowl on my toyo laser 73. Now the unit will run perfectly all day until the weather warms up. When it cycles off for a prolonged period two or more hours and restarts it will not start and gives a EE2 code. If I then press the red button on top of the fuel pump assembly and restart the unit, it will run perfectly again until it cycles off for any prolonged period again.

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  • mcnultyj Nov 05, 2008

    thanks for the suggestion but I found the real problem was the height of my new 275 fuel tank. Evently the tank was topped off moe than 8.5 ft above the bottom of the unit causing excessive fuel pressure forcing the float into the magnetic safe position. when I fired the unit on a cold start it would cycles for a short time and then shut down with the EE2 code. Once I pumped a 1/4 of the tank she runs fine. i guess for now on I can only fill it to the 3/4 mark or cut down the legs on the tank....Thanks again for your suggestion.......

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To clear the code the easy way, unplug heater for at least 30 minutes.While you are waiting, check your fuel tank to see if you have fuel.Then check filter to make sure the element is not clogged and thatthere is no air or water (or ice) in the fuel line. If you find aproblem with any of these things, correct it before trying to startheater again.

From another thread:
Laser heaters cease operation and display the EE2 code on the control panel when the primary
flame rod on the heater fails to sense a flame during the first 5 minutes of the Ignition and Pre-
Heat cycle.
What Can Cause An EE2 Error? The primary flame rod is the only sensor in the heater that
can cause the EE2 error. Thus, if it occurs, either there is (1) no flame to detect, or (2) the
sensor failed to detect the flame. The flame rod is located on the lower 1/3 of the burner. It is a
heavy wire with a ceramic insulator. A single white insulated wire connects this device to the
main circuit board. Replace the flame rod.

Not having a cleaning in the last couple years may be the problem.Carbon build up in the burner pot and on the flame rod (a chain ofcarbon) will cause the flame to not be sensed. Then the flame will burnout. A temp solution would be to unplug the stove, then unscrew andjiggle the flame rod to break the chain. When tightening the screws donot over tighten. You could also try hitting the edge of the pot to seeif you can knock the carbon loose. You could also have a warped burnerring which would cause problems keeping the stove running.

Please see these posts as well:
http://www.fixya.com/support/t318024-toyostove_laser_73

This document also should help:
The Heater Will Not Operate. EE2 Code or Reset Light Displayed

Posted on Nov 05, 2008

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  • Master
  • 19,396 Answers

EE2 code is usually fuel related, did you check that the fuel pump is not faulty.

Posted on Nov 05, 2008

  • Ginko
    Ginko Nov 05, 2008

    EE2 is fuel error.
    It looks like you have a faulty fuel pump that stops when overheats.

    By pressing the red button you reset and restart the system and restart the fuel pump.

    If the fuel pump is ok, check all the fuel filter, a dirty fuel filter or a clogged fuel line can cause not enough fuel being pumped into the gas chamber, and there you get the problem and the system stops.

    I also quote from EE2 code for toyo 56 - FixYa.

    "An EE2 error code is usually fuel
    related. What does your Toyo do before the EE2 code shows up? The
    firing process is the burner button blinks green for 7-9 minutes, then
    it clicks up to the medium, yellow light which starts flashing. That is
    when the fuel pump starts pumping. If you hear a fairly audible tic
    tic, or thump thump coming from the fuel pump then that is your
    indication that the fuel pump is starving for fuel. You either have a
    fuel line restriction, too little fuel, a clogged filter, a clogged
    sump screen, or rarely, a failing fuel pump. Usually, it is a fuel line
    restriction.

    If
    you hear no tic tic or thump thump and it just goes off on EE2 then the
    problem is in the burn chamber. You may have a carbon chain in the
    chamber causing the flame sensor to temporarily short out. You can
    clean the flame sensor, fuel nozzle, and igniter to resolve this
    problem until you can get your Toyo tuned up."


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Steps to fix a EE2 Code on a Toyo 30?


It is a fuel issue, when opening that valve with the fuel strainer out. If your fuel was right it would gush all over. More fuel or lift tank. I hope you have a filter at the tank, if so change the element. (its cheap and good preventive maintance.

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problem cause solution
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fuel tank valve closed open valve turning clockwise


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once

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EE22 means that your Toyo failed to ignite 3 times in a row. You need to unplug it for 30 minutes to reset the circuit board. Then plug it back in, push the red reset button on the right hand side in the little hole towards the back and push the Power button. Your Toyo should ignite after that barring some other problem caused by running out of fuel.

I am assuming that you ran out of fuel which caused the EE2 error code originally. Sometimes, when you run out of fuel you can get water, ice, debris in the fuel line causing an obstruction or limited fuel flow. You may also get an air lock. You may need to crack the fuel line at the back of the Toyo where there is 3/4 nut and bleed the line. If you see no fuel or a small quantity of fuel then you will need to thaw and/or purge the fuel line in order to get fuel to your Toyo's fuel pump.There is also a screen in the sump which can get plugged with rust, debris from the bottom of the fuel tank so you may need to clean the screen in order to get fuel to the pump.

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The firing sequence for a L73 is blink, blink, blink, on the green burner light, then it clicks up to the medium, amber or yellow light...that's when the pump kicks on. If you hear click, click, click, or thump, thump, thump, that means the pump is starving for fuel. The problem is from the carburaot/sump back to the fuel tank. You may have icing in your line or a line restriction, no fuel, plugged fuel filter or plugged sump screen. You can thaw your fuel line, until you have a free flow of fuel and then push the red restart button on top of the sump. Try to restart your Toyo.

If you follow the firing sequence and hear no click, click, click or thump , thump, thump and your Toyo goes off on EE2 then you can have a dirty flame sensor...the whilte wire running to a U shaped part that is the ground for the entire unit. You can take ythe ytwo phillips screws out, turn the part to the side and wiggle it out. Clean it qith a green scrubby or sandpaper and put it back in. Be sure it points stright down. Then take out the igniter which are the red wires. Put a long screw driver in there and rattle it around real good. You are trying to shake any carbon cxhains off the burner ring that can be "shorting" the flame sensor. You can also removee the 1/2 inch flare nut from the fuel nozzle...brass yellow colored metal part, and put a paper clip or wire down that about 3 inches. That will clear any blockage in front or inside it. Put everything back together, hit the red reset button on the sump and re-fire your Toyo. You might get it going in this manner. If not, you may need a tuneup because your Toyo is too sooted up to run correctly. Try these things and post back!

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Hi sammysamual,

My business is Laser Heating Service in the North Pole/Fairbanks areas of Alaska. An EE2 error code is usually fuel related. What does your Toyo do before the EE2 code shows up? If you let me know the sequence of events, I can trouble shoot the problem for you. toyotech

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Hi sammysamual,

My business is Laser Heating Service in the North Pole/Fairbanks areas of Alaska. An EE2 error code is usually fuel related. What does your Toyo do before the EE2 code shows up? The firing process is the burner button blinks green for 7-9 minutes, then it clicks up to the medium, yellow light which starts flashing. That is when the fuel pump starts pumping. If you hear a fairly audible tic tic, or thump thump coming from the fuel pump then that is your indication that the fuel pump is starving for fuel. You either have a fuel line restriction, too little fuel, a clogged filter, a clogged sump screen, or rarely, a failing fuel pump. Usually, it is a fuel line restriction.

If you hear no tic tic or thump thump and it just goes off on EE2 then the problem is in the burn chamber. You may have a carbon chain in the chamber causing the flame sensor to temporarily short out. You can clean the flame sensor, fuel nozzle, and igniter to resolve this problem until you can get your Toyo tuned up.

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What Does EE2 Mean? Laser 30, 56, and 73 model Laser heaters cease operation and display
the EE2 code on the control panel (instead of the clock or temperature settings) when the primary
flame rod on the heater fails to sense a flame during the first 5 minutes of the Ignition and Pre-
Heat cycle. On the Laser 55 and 72 the heater will stop and the red Reset lamp will light rather
than the EE2 code. (Note: There may be other reasons for the reset lamp to come on but much of
this information will apply.)
What Can Cause An EE2 Error? The primary flame rod is the only sensor in the heater that
can cause the EE2 error. Thus, if it occurs, either there is (1) no flame to detect, or (2) the
sensor failed to detect the flame. The flame rod is located on the lower 1/3 of the burner. It is a
heavy wire with a ceramic insulator. A single white insulated wire connects this device to the
main circuit board.

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