Pentair Mastertemp 400 Screen problem

mbeavers1

Well-known member
Sep 10, 2019
46
Houston, TX
Moved from here.
@ajw22 I have the same problem as the original poster but I wasnt as lucky. Same mastertemp 400 except I have the Intellicenter. Pool is 2.5yrs old and heater has always worked and nothing has been chamged. I followed all the steps up and checked the basics.

1. Heater has 220v at the breaker - breaker is on.
2. Fuse in heater is good - no visual damage like blackness typically associated w blown fuse.
3. Contol wires from relay to board in good shape and not loose.
4. Spliced firemans switch ends together - heater fired right up BUT my set up is different than his. Instead of having wire nuts in heater box, I have a control cable that runs back into the Intellicenter box and plugs into the board.

20210718_093439.jpg
4. Reconnected wires to board and fired Intellicenter back up....no heater.

Its clearly a relay or something else in the box - heater is fine. Any thoughts on where to go from here?

Thanks!
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
28,582
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Do you have a multimeter?

Use the continuity checker on your MM and check if the heater relay in the Intellicenter opens and closes when you request heat.

Check the continuity on your heater control wires.
 

mbeavers1

Well-known member
Sep 10, 2019
46
Houston, TX
I have a multimeter. The relay the power lines are tied into is on the far left. Not sure why so many wires tied into that relay...
20210718_104412.jpg

I measured voltage from the black to red wires here with and without the system calling for heat. Shows 240 all the time regardless if heater is on or off.

20210718_104449.jpg
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
28,582
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Disconnect the control line from J2 and check the continuity, NOT VOLTAGE, at J2 when you have heat on o0r off.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
28,582
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Yup, if you are operating the IntelliCenter correctly then it looks like the J2 relay failed.

You can examine the board to try and identify the relay and see if you see anything amiss.
 

mbeavers1

Well-known member
Sep 10, 2019
46
Houston, TX
Yup, if you are operating the IntelliCenter correctly then it looks like the J2 relay failed.

You can examine the board to try and identify the relay and see if you see anything amiss.
It also seems that this relay is on the board, meaning a complete replacement. 😒. Guess ill be callimg Pentair tomorrow. Thanks for the help!
 

MyAZPool

Gold Supporter
Jul 3, 2018
2,010
Arizona
Pool Size
20500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
I'm not sure how old your IntelliCenter is, but there seems to be quite the uptick recently in folks experiencing mothercard issues.
Almost all on newer installations. Not sure what is going on but obviously an issue with QC, quality of components used etc. :scratch:
One op even reported that the Pentair Tech Support rep alluded to the same. Lot's of mothercard warranty replacements lately.
Yes, definitely get a hold of Tech Support...

Technical Support
Toll Free
(800) 831-7133, * Press 1-2-2-2-1-1 for IntelliCenter
r.
 

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mbeavers1

Well-known member
Sep 10, 2019
46
Houston, TX
I'm not sure how old your IntelliCenter is, but there seems to be quite the uptick recently in folks experiencing mothercard issues.
Almost all on newer installations. Not sure what is going on but obviously an issue with QC, quality of components used etc. :scratch:
One op even reported that the Pentair Tech Support rep alluded to the same. Lot's of mothercard warranty replacements lately.
Yes, definitely get a hold of Tech Support...

Technical Support
Toll Free
(800) 831-7133, * Press 1-2-2-2-1-1 for IntelliCenter
r.
2.5yrs....so just out of warranty likely
 

MyAZPool

Gold Supporter
Jul 3, 2018
2,010
Arizona
Pool Size
20500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Oh...
Well, give it a shot. You may have the Pentair "Bundled Products" Extended warranty (3 years), if your IntelliCenter, VSF or IntelliChem were purchased and warrantied together in some way.

2021-07-18_13-35-33.jpg

Hope you have good luck getting that taken care of by Pentair.
r.
 

mbeavers1

Well-known member
Sep 10, 2019
46
Houston, TX
In luck! Since it was a new build and all my equipment is Pentair, I did qualify for the 3yr warranty. They confirmed the board does have to be replaced and sending someone this week.

Thanks for the help @ajw22!
 
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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,022
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
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