Easytouch issue with Mastertemp buttons

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Nitramnayr

0
Feb 17, 2018
54
Houston/TX
Pool Size
26000
Surface
Plaster
Chlorine
Liquid Chlorine
Happy Easter,
Went to turn on our mastertemp 400 remotely earlier today via the Pentair app and essentially no heating occurred: only the pump ran.

On the heater touchpad, if I select “spa on” instead of “pool on” the blower activates and the heater fires up. No LED diagnostics are illuminated. “Service Heater” is not lit. The pentair troubleshooting guide leads me to believe the control board needs to be replaced but I’m trying to confirm it.

I called pentair about this a few weeks ago and they said it’s most likely the wire between the easytouch and the heater. Before i called an electrician, I replaced the thermostat and bypass valve that was damaged and thought I had it solved since it worked once or twice. Now it’s back to its old habits.

Has anyone else experienced this? Is it as simple as replacing the wiring? Why does the heater choose Pool On when the spa is what we desire to heat? Again, it only fires up when I select “spa on” manually via the touchpad on the heater.

Thank you in advance!
Ryan
 

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Jimrahbe said:
Nit,

Is your heater being controlled by an RS-485 com port cable, or is it controlled by a 2-wire cable to the heater Fireman's switch?

Thanks,

Jim R.
Click to expand...
Ryan has a 5 button keypad that only has fireman switch control.
 
The heater when under automation control does not care if you have POOL ON or SPA ON. It runs when the automation tells it to.

I think you have a bad membrane keypad where the POOL ON button does not work.

Replace the keypad.

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com www.troublefreepool.com
 
Nitramnayr said:
Looks like I have a black cable 18AWG with a green and yellow wire. Fuse looks good. I will try a new membrane and see what happens, thank you guys!
Click to expand...
I swapped keypads and have the same issue. I noticed the Air flow sensor LED illuminates briefly but then turns off within a second- maybe a self test I never noticed before. Think it’s back to the wiring?
 
Where did you get the keypad to swap?

If SPA ON works that is all you need. You can just run your heater that way.
 
I had one in my parts bin from a neighbor. Trying to keep a good stock of these parts thst seems to always break.

Spa On does work. But the automation to tell the keypad/circuit board to use spa on doesn’t work. I’m trying to understand the comment about the automation not caring about pool on vs spa on. Why does it work when I hit spa on, but when it first activates it is in Pool on?

(Edited to add photo of wiring)
 

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Nitramnayr said:
I had one in my parts bin from a neighbor. Trying to keep a good stock of these parts thst seems to always break.

Spa On does work. But the automation to tell the keypad/circuit board to use spa on doesn’t work. I’m trying to understand the comment about the automation not caring about pool on vs spa on. Why does it work when I hit spa on, but when it first activates it is in Pool on?
Click to expand...
Automation does not tell the heater to use SPA On or POOL ON. it just closes a relay that tells the heater to run in whichever mode is on.

If POOL ON button worked the heater would run whether you pushed POOL ON or SPA ON.

The heater starts in the last mode it was in under automation control - POOL or SPA.
 
Nit,

When you use the Fireman's switch, you are supposed to set the heater to full on at 104 degrees, it does not matter if set to spa or pool. Then when the water temp is below your set point, the relay in the EasyTouch closes and the heater is comes on..

You can just short the green and yellow wire together and the heater should run. If it does not, then you have a heater problem, not an automation problem.

Thanks,

Jim R.
 

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