Scott1980 Posted March 6 Report Share Posted March 6 Hi I have a Great Lakes hot tub that operates off the balboa gvs500 board. After I got it and before it was installed my son took it upon himself to disassemble the topside control. Let me mention I have not seen the hot tub function before. So I got the proper gfci breaker and hooked up the hot tub. I read somewhere that the tub would partial function without topside control. I energized the board with 220v but nothing has happened. I checked the incoming voltage and each leg is testing at 120. I then checked all fuses and for power on each side of fuse and the are all getting power going in and out of the fuse location. I am stumped on what to do from here. Any help/advice would be much appreciated. Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted March 10 Report Share Posted March 10 Some boards will run without the topside connected but it takes about 5 mins for it to get past the priming mode. How long did you wait? Quote Link to comment Share on other sites More sharing options...
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