Just finished plumbing and wiring a cedar hot tub with a BP501 controller. When I switched on the breaker, I got no display on the topside panel (TP400t) and only a repeating "click" sound from a relay in the controller switching open and closed. Relay clicks every ~5 seconds.
Both the controller and topside panel are from eBay and I can't verify them as good. They were stated to be good, of course, but who knows.
Controller is BP501. Technically it's a CL501X1 -- a Clearwater Spa controller. I'm not sure if that would affect compatibility to the topside panel or not.
Topside panel is TP400t. The backlight LEDs go on when I plug it in, however the LCD display does not. The status LEDs don't go on when I press any buttons, such as to activate the jets. Panel appears in "new" condition.
Some symptoms:
The Pump #1 connector has 120v to the top 3 pins. I would expect these to be either 0v, or 240v depending if the pump should be running.
I saw on a YouTube video that pumps should immediately start running if topside panel is disconnected, to indicate a problem. This doesn't occur for me (as above)
I've tried playing around with the setting DIP switches but haven't gotten any behavior besides the constant open/close noise of the relay.
I've pulled out each of the fuses and tested continuity.
So I'm hoping to get help figuring out which component is the problem child (or both? or neither?)