Question about Takagi TM-RE10 Temperature Remote Controller

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Abnormal two-way valve

Error code 541 - Abnormal Two-way valve. Any fix? Or need to replace it?

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The PC board says it needs to be swaped out

Posted on Jun 06, 2014


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Am I right to assume that you have an intelligent gas valve? If so, google 'Intellivent Gas Valve error codes'. You will find all of the error codes and what to do to fix it.

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How do you turn the valve manually?

the valve has a shaft with a small pin, it can be turned with a needle nose plier.

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its called a flow switch it is in the pump can b replaced when u turn on it pumps air in valve shuts replacemnt will sort it

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1 Answer

Error code 541

Error Code 541 indicates that the Two Way Valve is malfunctioning. This assembly consists of a small motor and a rotating ball valve that is operated by the motor. The replacement part is only sold as a unit (Motor and valve) for about $200. It is located in the lower left of the unit, behind the flow valve. (i.e. it is hard to reach in order to service it). You basically have to take out the exhaust fan, take out the flow valve in order to replace the 2-way valve. It's doable as a DIY, but it's not trivial.

The valve could be crusty from deposits, so before taking everything apart, it would be wise to flush the heater for 45 minutes with anti-scaling and a recirculating pump to see if anything breaks loose. (using the service valves that should be mounted on the bottom of the unit)

Mar 02, 2013 | RTO Takagi T-M1 Mobius Gas Tankless Water...

1 Answer

What does an error code 66 mean on a noritz Model N-0751M

The Noritz field manual says that error code 66 is Bypass Water Control Valve failure. Call support at 866-766-7489 with your model #, serial # (both on the unit face plate), date of purchase, to see if the valve can be replaced under warranty.

Jul 14, 2012 | Water Heaters

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Takagi code 541

Code 541 means the 2 way valve is not turning, that could be the valve has build up calcium due to hard water and the attached motor is not able to turn it, or the motor is broke or finally the controller (Compute Board is defective).
The 2 wau valve sits behind another valve when looking at the unit on the left hand corner, it must be taken out first to gain access to the 2 way valve.
The 2 way valve motor can be seperated from the valve by two screws and the valve can be manually opened but turning it to the horizantal position, there is a pin on that shaft.
Turn kon the heater then but leave the motor connected, if the motor turns for short time then the PCB is most likely ok. This usually indicated that there is too much of build up inside the valve. If the tankless was properly with bypass valves (outside of the unit) installed then this can be easily fixed.
Turn the unit off and run with an external pump and bucket with vinegar for about 30 minutes by using the bypass valves. This will clean the 2 way valve from inside and should turn then easily and the motor will be able to control it. This is usually beyond the DIY scope, call a real pro for that.

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2 Answers

Replaced mother board due to error code c2 11 as per rheem tech department. now code 11 flashes after 3 to 4 minutes of use and unit shuts off. WHAT NOW????

Rheem, Richmond, Ruud, and Paloma are all the same manufacturer. After about 9 months, my tankless RTG-74PVN started giving me error code 11 and cold water!. I fixed it by cleaning the burner, as shown in this video:

Dec 29, 2010 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

Sometimes the hot water just goes cold

Here are a couple things to look for:

1) flashing burner light - a flashing burner light indicates the unit is getting an error code
common error codes:
A. continuous flashing - ignition failure or abnormal combustion; look for visible water in the machine indicating a leak, check gas pressure, debris or buildup on flame rod/igniter plug, or clean unit with compressed air
B. 3 flashes - error 16, abnormal outlet water temperature; typically this code indicates you'll need to descale you unit
C. 4 or 5 flashes - exotic error codes; you should contact Noritz technical support to deal with these codes

2. If there is no flashing code, try increasing the hot water flow. In the summer time you typically use less hot water; this can result in intermittent operation of your tankless heater. Increase water flow by either: A. cleaning your showerhead and removing scale deposits B. widening your flow restrictor C. Remove your flow restrictor in the showerhead

3.If none of these resolves your problem, you probably have debris in your flow sensor. Contact Noritz technical support for a walkthrough on removing debris from a flow sensor.

Feb 18, 2010 | Noritz 6.3 Gallon Residential Tankless...

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