RDspaguy Posted June 26, 2021 Report Share Posted June 26, 2021 Well, it's a close call. I would plug in a transformer, but I carry one on my truck. I can't say I've ever seen one that close. But a bad transformer can cause a watchdog. Is there any chance that the new pumps are different voltage or hp than the originals? Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted June 26, 2021 Author Report Share Posted June 26, 2021 6 hours ago, RDspaguy said: Well, it's a close call. I would plug in a transformer, but I carry one on my truck. I can't say I've ever seen one that close. But a bad transformer can cause a watchdog. Is there any chance that the new pumps are different voltage or hp than the originals? The new pumps are rated as 4hp, 12amps. the cold pumps were 2.5 continous 5.1 max 11.7 amps hot tub parts supplier sujested them as an aftermarket replacment. He said that the hp #s were inflated and that you really want to match the amp draw. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 26, 2021 Report Share Posted June 26, 2021 He is correct. Just making sure. I would try the transformer. Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted June 26, 2021 Author Report Share Posted June 26, 2021 6 hours ago, RDspaguy said: He is correct. Just making sure. I would try the transformer. ok i will call on monday and order a new one. does it have to be a jacuzzi brand replacement or is there a cheeper aftermarket transformer i can buy? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 27, 2021 Report Share Posted June 27, 2021 Not that I am aware of. Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 17, 2021 Author Report Share Posted August 17, 2021 @RDspaguyhey sorry to keep bothering you with questions... lol. I replaced the transformer with a brand new unit from jacuzzi. b1-b2=10.57 y1-y2=14.80 b1-y1=2.69 b1-y2=12.37 b2-y1=13.06 b2-y2=2.44 241 VAC at the pins going into the transformer. It seams wierd to me that the new transformer is even farther out of spec than the old one. the incoming coltage is the same as at the transformer. At this point i have changet the high limit the temp sensor and the transformer. would you advise thats the next step would be a new curcit board or is there any other parts i should check first? Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 18, 2021 Author Report Share Posted August 18, 2021 Ive tried disconecting the two main pumps from the board, aswell as the circ pump to see if watchdog mode would go way but no luck. i think i have exhausted pretty much every option besides the curcuit bord at this point. Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 18, 2021 Author Report Share Posted August 18, 2021 Just to confirm again. The fact that i have my stereo controll module disconnected, wont send the tub into watchdog mode? Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 18, 2021 Author Report Share Posted August 18, 2021 I have pulled the curcuit board out and i cant see any visable damadge to the board. Such as a broken curcuit and or burnt component. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted August 18, 2021 Report Share Posted August 18, 2021 You have eliminated the other possibilities, so that's what's left. Are you sure you connected the new sensors properly? Put one tiny wire in the wrong slot and watchdog is what you get. 1 Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 23, 2021 Author Report Share Posted August 23, 2021 On 8/18/2021 at 9:39 AM, RDspaguy said: You have eliminated the other possibilities, so that's what's left. Are you sure you connected the new sensors properly? Put one tiny wire in the wrong slot and watchdog is what you get. I belive so. is there a connector pinout available to check? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted August 23, 2021 Report Share Posted August 23, 2021 https://www.spaandpoolsource.com/flo-switchandtemperaturesensorharnessdiagram.aspx Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 24, 2021 Author Report Share Posted August 24, 2021 Yes i just checked, everyting is in the proper pin location on the sensor plug. The jacuzzi tech is coming out tomorrow to diagnoss the issue. I got quoted 1500CAD for a new curcit board, so i figured i want to be 100% sure before i replace it. Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted August 24, 2021 Report Share Posted August 24, 2021 I might have a used board. Where are you located? Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted August 24, 2021 Author Report Share Posted August 24, 2021 Vancouver Island B.C Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted August 25, 2021 Report Share Posted August 25, 2021 Ouch I'm in Ontario Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted September 2, 2021 Author Report Share Posted September 2, 2021 @RDspaguyhey sorry to keep bothering you..... I've replaced the controll board(6600-161) with a 6600-728. now the spa turns on and warms up to temp with the circ pump, but none of the controlls work. if i hold down the pump 1 or pump 2 button, it shuts off the heater and the circ pump. and then i have to re-set the tub to get it to work again. this is pretty much what was happening before the old board went into watchdog mode..... currently the led dcu is unpluged as im fairly confident it was damadged. i have checked the jumper pins multiple times... nobody seams to have an answer for me, the jaccuzzi tech said it could be the topside. but im getting tired of just replacing parts at this point. Thanks, Chuck Quote Link to comment Share on other sites More sharing options...
Chuck2jz Posted September 2, 2021 Author Report Share Posted September 2, 2021 Somthing that seams wierd. i tested for voltage goint the the jet pumps at the pins on the board. i was getting 122v from both hot wires when testing to ground but when i tested across both hot wires it read 0.2v. why would that be? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted September 4, 2021 Report Share Posted September 4, 2021 Because one leg of the pump is always on, so you will have voltage to ground everywhere, but no voltage between points except across the relay. Verify 240v at the spa main power wires. 1 Quote Link to comment Share on other sites More sharing options...
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