help needed to save an old 2003 sm260

Firefly if you are not getting DC power to the SSR then you may have a bad door switch or thermal safety. If you can give us a call and ask for tech support we can assist in trouble shooting the unit. (800) 423-0698

Hello, thanks for the reply. The thermal safety is working I tested the connection, and it is closed, and I gave it a quick clean. I will try to find where the door switch is wired back too or do you know where or what colour cable it is? Is it possible to shorten it just to prove the problem? I was thinking it was possible the K thermocouple not wited as the oven temp is displayed at 100 from power up.

im in the UK so phone calls would be whatsapp

Do you have 6CDC from ground to the white wire? Do you have 14VDC between your blue and purple wires? If not run your red wire to ground and see if that gets your voltage up on the blue and purple wires.

6vdc from White to earth nothing between blue and purple. The door switch is open even when door is shut.

If the switch is functioning the red wire should have continuity to ground with the door closed. If it does not it will not send a DC signal to the relay.

No it has no connection to earth open or closed. In case it helps the door switch has 3 cables coming out red, white, and an earthed green.

Three wires are correct. Run the red wire from your control to ground and that should get you running.

So if I short out the red cable on the controller connector block to the
case it should work.

That is correct.

I have connected the red to earth now, and there is no voltage between blue
and purple. But there is 15v between ssr 3 and earth, also 15vdc between
ssr 4 and earth.

If you have 15v between 3 and ground but not between 3 and 4 on the SSR then it sounds like your board is not sending your negative. Try running you 4 on SSR direct to ground. I would also be happy to test the board if you wanted to send it in.

I have 15v between 4 and earth on the ssr too so should I still earth 4?
I can send it off to you to test it out, but are you able to fix these old
boards. I just thought 2003 could be a bit old.

Yes disconnect the 4 wire and run it to ground.

Your a star. I just went back to do that, and I noticed that one of the red
cables for the door sensor was not in the connector block properly. I
plugged it back in and smoker fired up ov on ssr4 and 15v on ssr3 both
heaters came on. The only problem left is the oven temperature as it
quickly went past 230f, and didn't stop but the controller still said oven
temp 100. I have replaced the old thermocouple that was in there because it
was snapped inside the oven. But the new one only has 2 cables (red/white)
while the old one is black, white, and green, which is an earth. Is it
possible it is wired the wrong way?

Currently the + of the thermocouple is going to the grey cable and the - is
going to earth

If your original probe was a three wire bolt in you need the PV721 probe which is an LM34 temperature transducer. I have attached the wiring diagram.

If it is a two wire it in a thermocouple which sends a millivolt signal to the control. The LM34 is a transducer which takes the 6v power and reduces it to a lower signal volt back to the board.

Oo that’s not going to be easy to find google only come up with semi conductor chips not a probe, and I couldn’t see it on cookshack either.



Kind Regards Noel

KCBS CBJ

FireFly Barbecue limited

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pitmaster@fireflybbq.co.uk <mailto:pitmaster@fireflybbq.co.uk>



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Try contacting our dealer in that region and if they do not have one in stock we can ship direct. Our part number is PV721 and they run $110.16 US.

Nick Kelvin, Managing Director
THE AMERICAN BBQ COMPANY (Europe) Ltd
Unit 2 Hockliffe Business Park
Watling Street
Hockliffe
Bedfordshire
England
Phone: 0800 6444 141 (UK Local Rate Call)
EU/overseas callers: +44 (0)1442 927727
E-Mail: info@americanbbq.co.uk

I'll speak to Darren at American bbq tomorrow. I got the one I had from
him. But he had never seen a 3 wire before., and thought it was an
aftermarket replacement.

Darren, from American BBQ should be sending you an order. Thanks for your help btw.

Will it have to be wired different because in the diagram it is connected to the grey cable, and the red cable that is part of the door switch that we shorted to earth.



Kind Regards Noel

FireFly Barbecue limited

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The 3 wire thermocouple arrived today, and i fitted it, and the grill is back up and working. I did ask darren for a door sensor but i think they have changed as well because he sent me a push buttone and this old one is magnetic i think. Anyway the bypass on the door sensor works.

thank you for your help as always

Sweet!

Peterlpqs. I thought it was a K type as well, but this grill pre-dates those, and uses a 3 wire transducer

Peterlpqs, The older units had a base temp of 100F and they do not read until the temp goes above that. Are you having more trouble with the unit?

no its all fixed. New thermocouple, new element, and the board needed fixing.

And it did just sit at 100 until it went higher.