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WCohn
WCohn, Journeyman Plumber
Category: Plumbing
Satisfied Customers: 508
Experience:  Journeyman Plumber/Estimator
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Rinnai Continuum...Remote Control display not illuminated.

Customer Question

Rinnai Continuum...Remote Control display not illuminated. Although there is 120vac feeding unit, there is no 12vdc at the two terminals feeding the remote control.
JA: Did you double-check the thermostat? And what about the unit's filters?
Customer: Will a clogged filter "electrically" remove the 12vdc feeding the Remote Control?
JA: Do you plan on doing the work yourself?
Customer: I'm already in the middle of it
JA: Anything else we should know to help you best?
Customer: The entire unit is about 7 years old and has never had any problems. The current symptom is no illumination of the remote control. There should be 12vdc at the measuring point but I have nothing. Is there a transformer i should be looking at now?
Submitted: 3 months ago.
Category: Plumbing
Expert:  WCohn replied 3 months ago.

My name is ***** ***** I look forward to helping you!

Expert:  WCohn replied 3 months ago.

So you have 12VAC at unit, but not to the terminals that the low voltage wires that feed the controller?

Customer: replied 3 months ago.
120vac feeding the unit. The fuses are good. But no 12vdc at the terminals feeding the remote controller.
Expert:  WCohn replied 3 months ago.

Okay I've seen this several times where the controller goes bad, but if the two screws where the low voltage wires go doesn't have 12 volts then its the computer board or the low voltage transformer.

Expert:  WCohn replied 3 months ago.

Do you have a multimeter?

Customer: replied 3 months ago.
Thanks. Do you know how to determine which is the problem?
Expert:  WCohn replied 3 months ago.

If you have a multimeter we can test the transformer.

Customer: replied 3 months ago.
i do...how do I test the transformer?
Expert:  WCohn replied 3 months ago.

Give me a second to pull up a diagram

Expert:  WCohn replied 3 months ago.

Is your a 2432? 2430?

Customer: replied 3 months ago.
I must go check...Please hold
Customer: replied 3 months ago.
M/N: REU-V2020W_US
Expert:  WCohn replied 3 months ago.

Here it is. Attached to the back of the unit on the right side

Expert:  WCohn replied 3 months ago.

I assume you have already done this.

Expert:  WCohn replied 3 months ago.

I see the first pic did not go through. Resent here

Expert:  WCohn replied 3 months ago.

You have to remove the fan to see the transformer, but not to test it. Its behind the fan, but you should be able to reach back there and find the wires

Customer: replied 3 months ago.
Ok Thanks...This will take some time.
Expert:  WCohn replied 3 months ago.

Yes. Its what I do all the time as a certified and factory trained rep. Some times its fun but not always.

Are you satisfied with my service?

Customer: replied 3 months ago.
Transformer had 62.8 ohms but when I checked the 120vac feed (Blk to Wht), there was no power...I suspect the board is bad since that's the power source feeding the transformer.
Expert:  WCohn replied 3 months ago.

You are correct! Good job.

Expert:  WCohn replied 3 months ago.

If you are satisfied with my service, could you please give me a five star rating. Tips are greatly appreciated.

Expert:  WCohn replied 3 months ago.

Do you have any further questions?

Expert:  WCohn replied 3 months ago.

How's it going?

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