Pentair mastertemp 400

[eskandari_n1]

here it is.

 

[ajw22]

here it is.

Your closeup pictures do not show the entire situation.

Show me a picture that lets me see ALL the wiring like in post #10.

 

[eskandari_n1]

see picture, thanks for your help

 

[ajw22]

Somehow you are losing 6 volts over the fireman’s circuit with 19.8 volts here compared to the 26 you measured earlier.

You still have not showed me the fireman’s circuit connection. You have a high resistance in it causing the lost voltage which is why the board does not turn on.

 

[eskandari_n1]

discontent from yellow nut read 23.7v , no short anywhere. see picture below. thanks

 

[ajw22]

Twist these two yellow wires TOGETHER and put one wire nut around them.

The wires need to be connected for the heater to start.

 

[eskandari_n1]

display on and heater came on too.

 

[ajw22]

display on and heater came on too.

Great. Run the heater locally and confirm it heats to the correct temperatures.

Your problems are with the EasyTouch system.

 

[eskandari_n1]

thanks, how do i know what is wrong with EasyTouch system?

 

[ajw22]

Show me a picture of the EasyTouch board and the J19 heater relay.

 

[eskandari_n1]

here it is. thanks again.

 

[eskandari_n1]

sorry i add front of bd twice.

 

[eskandari_n1]

is there any place i can schematic for this board?

 

[ajw22]

Disconnect the wires from J19 and test if the relay is open when there is no call for heat by the EasyTouch and is closed when the EasyTouch turns the heater on.

Do you understand how to test that?

 

[JamesW]

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[eskandari_n1]

Disconnect the wires from J19 and test if the relay is open when there is no call for heat by the EasyTouch and is closed when the EasyTouch turns the heater on.

Do you understand how to test that?

I see it is open but not closing.

 

[ajw22]

I see it is open but not closing.

Then the relay is not working and the heater should not turn on when you connect the wires to the heater.

Is that what happens?

 

[eskandari_n1]

Then the relay is not working and the heater should not turn on when you connect the wires to the heater.signal

Is that what happens?

I was using App to turn on and off SPA.I think relay is not receiving signal. how do you test relay?

 

[ajw22]

I was using App to turn on and off SPA.I think relay is not receiving signal. how do you test relay?

Use the Outdoor Control Panel to turn the heat ON and OFF.

Select a Gas Heater and raise the temperature above the water temperature, and the J19 relay should close.

Lower the temperature below the water temperature, and J19 should open.

 

[eskandari_n1]

Use the Outdoor Control Panel to turn the heat ON and OFF.

Select a Gas Heater and raise the temperature above the water temperature, and the J19 relay should close.

Lower the temperature below the water temperature, and J19 should open.

View attachment 623546

I replaced both ULN2803 on controller board and fixed the problem, thanks for your help.