Max Caddy circuit board problem

[brenndatomu]

Is it possible that the control board could just be in some kind of manual "maintenance" mode forcing the burner to run?

 

[Wisneaky]

The common is on the top port which is marked as common

try the port right below it that says common hot 24

 

[Jason762]

Brenndatomu,
I have no idea
Wisneaky,
When I disconnect the R from the 24v hot port, The only way I can get the Tstat to power up is if the R is connected to the top port of the wood Tstat 24v. It doesn't power up on the user Tstat 24

 

[Jason762]

I guess I'm confused as to why the C can't be hooked into the 24 common port and the R into the Hot port on the left side. Isn't that what those terminals want. C wants common and R wants hot. That just leaves W which should go into the user Tstat 24V on the right

 

[Wisneaky]

Brenndatomu,
I have no idea
Wisneaky,
When I disconnect the R from the 24v hot port, The only way I can get the Tstat to power up is if the R is connected to the top port of the wood Tstat 24v. It doesn't power up on the user Tstat 24

I'm going to try and explain this as simple as possible. Take the r and w put it on the right on user 24VaC take that common wire and take it to the left side and try it on the second one down from the top it says hot24 if that doesn't power it than leave it where it is and take a little piece of wire and make a jump that goes from the 24hot where the common wire is and run that jumper straight up to the next one that says common.

 

[Wisneaky]

I guess I'm confused as to why the C can't be hooked into the 24 common port and the R into the Hot port on the left side. Isn't that what those terminals want. C wants common and R wants hot. That just leaves W which should go into the user Tstat 24V on the right

It is just not the way it works. The right side needs both the r and w to call for heat.

 

[Jason762]

I did exactly what you said and got nothing.

 

[Wisneaky]

I did exactly what you said and got nothing.

I think something is wrong than. try to send an email to [email protected] or call 418-878.3040

 

[Wisneaky]

I wonder if the c goes to common and that hot24 needs the r with a jump to the right side to user 24vac.

 

[Jason762]

Yeah something is def wrong. Thanks for the help. I called them today and they left me on hold for about 10 minutes then said they'd call me back which they never did. I'll probably just go thru my local dealer where I bought it.

 

[Jason762]

Like I said when the C is hooked to Common and the R is hooked to Hot24 the tstat turns on. But I can't tell is using a jumper will work or not cause the oil burner just keeps on running.

 

[Wisneaky]

Like I said when the C is hooked to Common and the R is hooked to Hot24 the tstat turns on. But I can't tell is using a jumper will work or not cause the oil burner just keeps on running.

You tried a jumper from Common to hot 24 and left the common wire from the thermostat to one of the two at the same time?

 

[Jason762]

Yes

 

[Wisneaky]

Otherwise I would leave the c wire on common and take a wire and run it from hot24 to user 24vac and hook the r wire to the jumper wire on user 24vac.

Yes

I'll pm you.

 

[STIHLY DAN]

You tried a jumper from Common to hot 24 and left the common wire from the thermostat to one of the two at the same time?

This is a direct short. once you let the smoke out, it does not go back in.

 

[Jason762]

So what is the solution Dan?

 

[brenndatomu]

Smoke pump ... sorry I'll let myself out now

 

[Wisneaky]

This is a direct short. once you let the smoke out, it does not go back in.

Sorry wasn't thinking clearly today. Stupid me.

 

[brenndatomu]

Get anything figured out here yet?

 

[Jason762]

Yeah looks like the mother board is fried. I'm working with the company to get it replaced.