f499 Posted November 19, 2023 Report Share Posted November 19, 2023 Quick Facts: Innova Spa Urbania, 110v/240v, Balboa spa pack VS300. Hot tub was initially wired with 110v setup, and ran fine. Heater was good (@110v, 1kw, of course not running when pump on high speed). No issues keeping tub at 102F. We finally got around to getting a 50a disconnect installed, with 6/3 wiring. We did our fall water change, and wired up the tub with 240v setup. Followed the instructions: removed the jumper wire linking J11 and J32 and moved the dip switch to the down position/off/high amp mode. Flow is good, as the tub was filled via the filter compartment. To our surprise, no heat. The water temp started at about 80F, and eventually it dropped to 77F over a 4 hour period. I did some searching, and decided to do persistent memory reset. Got the tub back running, and let it run overnight. Woke up this morning: still 77F (outdoor temp was about 28F, so assume pump was keeping it at about 77F) Did a voltage test and ohms test. All good. (multimeter, AC mode and touching both heater terminals: 240v) Ohms was about 14 if memory serves me right. Continuity was good too. We decided to revert back to 110v, to see if heater would work. Plugged it in at about 4pm today. Over the last 4 hours, it has climbed by 10 degrees (from 77F to 88F), which seems normal for the heater running on 110v (1kw) So, assume the heater is fine, when wired for 110v (with jumper wire back on and dip switch back to up/on position) Has any ever encountered this scenario, where the heater won't work in 240v mode? We've called a tech, and scheduled an appointment in about a week. Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted November 19, 2023 Report Share Posted November 19, 2023 First confirm incoming power white to black 120V, white to red 120V red to black 240V. Next post photos of the circuit board and the schematic on the inside cover 1 Quote Link to comment Share on other sites More sharing options...
Cusser Posted November 19, 2023 Report Share Posted November 19, 2023 14 hours ago, f499 said: Did a voltage test and ohms test. All good. (multimeter, AC mode and touching both heater terminals: 240v) Ohms was about 14 if memory serves me right. Continuity was good too. Hmmm - 14 ohms across heater terminals sounds about right (and matches heater element resistance on my 1988 spa). And if 240 VAC was getting to the heater element, failing to heat doesn't make sense to me. Let the professionals comment, I'm not one !!! Quote Link to comment Share on other sites More sharing options...
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