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Spa not working after board replacement


RxK88

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My spa had no power when checked on it yesterday. It  had tripped the breaker. I reset the breaker and still nothing.  I turned the breaker off again and took the cover off the control box and could smell burnt electrical upon further inspection I could see the board had a burnt spot under one of the relays. 

The board is a 6600-288 the replacement for the board is now 6600-726 which I purchased and installed. 

I still have no topside lights / display.

I checked the main fuse and its ok. 

I tried turning off the power. Disconnecting the display and turning it back on and nothing. 

I did note there is a line of pins on top of this replacement board that the 288 board didn't have and an extra connector. 

Any direction would be very much appreciated.  

IMG_8203.jpg

IMG_8204.jpg

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Schematic on inside cover of pack? Also back the camera out so we can see the entire board and wiring

Do you have a multi meter and know how to use it?

In the top photo the bottom sensor looks crooked. Is it on properly?

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