Do I have a bad pump relay?

lvrpl · Dec 9, 2017

I've been having an intermittent issue (that has now turned into a permanent issue in the last week or so) where my filter pump does not turn off, even when my controller (a Compool LX100 that has been upgraded to an EasyTouch) is not sending a run signal. Some reading indicates that this may be a bad filter pump relay - does that sound right?

And if so, is this a generic part I can buy somewhere? Or do I need to buy the OE part from Pentair?

Thanks for any help.

Jimrahbe · Dec 9, 2017

lv,

Since you have single speed pumps, then the relay actually controls the voltage going to the pump. If the pump still runs when the little twisted wires from the relay to the main control are unplugged, the relay is bad (Stuck in the closed position).

The pump filter relay is the same as all the other relays, so if you have an unused one, you can use it.

I would recommend buying an OEM relay just because it will be easy to mount and will come with the little coil wires and connector.

All that said, this week in the Dallas area was cold enough to turn on your freeze protection. When the freeze protection is on, it will often look like something is wrong as the automation features do not function and the pump will not turn off when you think it should. I would recommend that you ensure the pump filter relay is bad by just unplugging the relay coil wires where they plug into the main PCB. If the pump continues to run with the coil wires unplugged, it can't be anything but the relay.

Thanks for posting,

Jim R.

lvrpl · Dec 9, 2017

Great suggestion - I did as you said and unplugged the filter pump relay connection on the main board. The pump still runs so it looks like it's definitely a bad relay. Thanks for the help!

Also, it looks like the OE relay is something like $110 or so. Is that a normal price for a relay like this? Or is there a ton of markup on the OE Pentair relay?

Jimrahbe · Dec 9, 2017

lv,

The $110 dollar one should be for the 2 speed pump relay... I assumed you had a single speed pump.

Here is a link to the standard relay... https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwiJhtHmx_7XAhXEt8AKHQqlCLcYABAFGgJpbQ&ohost=www.google.com&cid=CAASEuRolTxmUuK-_8NWvCL-Bvnmgw&sig=AOD64_2Mby9ZzwXerlkz3wq4YlAcJtIXnw&ctype=5&rct=j&q=&ved=0ahUKEwiAgszmx_7XAhVH74MKHaIZB3YQ9aACCDs&adurl=

Thanks,

Jim R.

gary300 · Dec 10, 2017

If you did the Compool to Easytouch conversion, you will still be using the same Compool style relays.

https://www.amazon.com/Compool-RLYLX-Midtex-187-26C2L1-Relay/dp/B00D6X5KBW/ref=sr_1_1_sspa?ie=UTF8&qid=1512884759&sr=8-1-spons&keywords=compool+relay&psc=1

Jimrahbe · Dec 10, 2017

gary300 said:
If you did the Compool to Easytouch conversion, you will still be using the same Compool style relays.

https://www.amazon.com/Compool-RLYLX-Midtex-187-26C2L1-Relay/dp/B00D6X5KBW/ref=sr_1_1_sspa?ie=UTF8&qid=1512884759&sr=8-1-spons&keywords=compool+relay&psc=1

Gary,

Good catch... :goodjob:

I did not realize that there was a difference in the relays. Certainly makes sense now...

Thanks for the post.

Jim R.

lvrpl · Dec 10, 2017

Awesome, thanks for the help! I've got one ordered and will slot it in as soon as it gets here.

gary300 · Dec 10, 2017

Just as a side note - the relay with the screw connector block attached will generally cost more than just the relay only. That connector block is a real pain to try and get off of the DIN rail. If you were installing a new relay in addition to the others, then you would have to buy a relay with the connector block attached, but if just replacing a relay then the relay only option is way easier. This is only applicable if dealing with the original Compool style relays.