Mastertemp400/Automation issue

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J

James L.

Active member
Feb 20, 2025
31
Baton Rouge, La.
Mastertemp400/Intelli-Touch wireless system w/remote touch pad.
Trouble shooted (shot?) heater and found bad membrane pad. Replaced membrane pad. Heater works fine at membrane pad with jumper at fireman's switch.
However, heater does not respond with Intell-Touch remote (with no jumper; remote wires are connected).
When "heater" button is pressed on remote, automatic valves correctly switch to spa mode, but heater does not respond.
Any ideas? Thanks.
 
Ahultin said:
Have you confirmed continuity on the conductors going from the intellitouch to the heater?
Click to expand...
The green and yellow wires that connect to the fireman's switch on one end, and the heater connection in the wall mounted control box on the other end? If so, those two ends are about 5 feet apart, and my multimeter leads are about 6 inches long. Or maybe I'm not understanding (quite possible, actually).
 
James L. said:
The green and yellow wires that connect to the fireman's switch on one end, and the heater connection in the wall mounted control box on the other end? If so, those two ends are about 5 feet apart, and my multimeter leads are about 6 inches long. Or maybe I'm not understanding (quite possible, actually).
Click to expand...
If you connect the fireman's switch wires together at the intellitouch end does the heater activate ?
 
Well, new development. Pumps were running normal, I was handling fireman's switch wires at IntelliTouch circuit board, then everything shut off by itself. Display on control panel shows "air" and "12:00 am". Shut off all circuit breakers in control box, waited a minute, flipped them all back on, normal delay while everything reset, then all pumps and system returned to normal operation. Then, after about 2 minutes, everything shuts off again. Repeated this a few times, same result. Any ideas?
 

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James L. said:
Well, new development. Pumps were running normal, I was handling fireman's switch wires at IntelliTouch circuit board, then everything shut off by itself. Display on control panel shows "air" and "12:00 am". Shut off all circuit breakers in control box, waited a minute, flipped them all back on, normal delay while everything reset, then all pumps and system returned to normal operation. Then, after about 2 minutes, everything shuts off again. Repeated this a few times, same result. Any ideas?
Click to expand...
Sounds like you shorted one of the wires in the low voltage compartment - check that first - if nothing - then try turning on breakers one at a time let it run if it doesn't shutoff add another circuit breaker until you reach the one that is causing the shutdown
 
Fixed! (cautiously optimistic)
Youtube video by "Binh-Tuner with kids" described similar weird issues after a power outage/lightning strike in the area (my area had about 750 customers w/o power for a few hours). He quite professionally diagnosed a faulty transistor (ULN2803APG ULN2803 Darlington Bipolar Array,Eight High-Voltage,50 V/500 mA DIP-18) in the back of the control board in the control box. There are two of them, thankfully in sockets, not soldered. About 60 cents each. Replaced them, and the pool pumps have been running normally for the last several hours. Thanks to all who responded!
 
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