Inside control panel had all LEDs illuminated, including 2 with no corresponding button that can be seen thru the cover. Screen shows 6700 Rev C. Display backlight also turns on and off randomly when issue is present.
Had this issue before. Tinkered with it some (Rpl 9V batt, disconnected spa-side remote, cycled power) and it went away for months.
It's intermittently back again. Thought issue was with the inside controller board. While it was having issues, looking at backside of circuit board, I found a 5V regulator (TO-220 package). Measured incoming voltage via the red wire that's supplied from the outside panel. It was 5.3V or so. Between the red power wire and the 5V regulator there's a power diode, so voltage drops another 0.7V down to 4.6V at the 5V regulator input. Output voltage from the 5V regulator is 4.3 volts. Thinking this is a bit low.
Since it's nice outside today, the controller is of course working perfectly, but wanted to dig a little deeper anyway. Went to outside panel and found the 4-wire bundle from the inside controller. Located the Red wire and measured voltage at the terminal block at 9.85V. Disconnected the Red wire and voltage at terminal block rose to 9.93V. Re-connected the Red wire and voltage dropped back down to 9.85V. Went inside and measured Red wire voltage at 7.58V, so a 2.3V drop over abt 25 ft of wire run. Went back outside and removed the Red wire again and placed an ammeter in-line. Measured the start-up current of the inside control panel at 248mA and after a couple of seconds, it dropped to 128mA and was steady. Using the voltage drop across each end of the Red wire (2.3V) and the current flow (128mA), I calculate ~18 ohms of resistance.
When the inside controller is working good, the 5V regulator has abt 6.8V present at it's input and 5.1V on the output.
To summarize, I believe it's one of 3 possibilities:
1. Inside controller is pulling too much current when it's having issues.
2. Outside control panel isn't supplying sufficient current to maintain the proper voltage.
3. Red wire resistance is excessive intermittently. (seems unlikely)
Suppose I'll have to wait for it to act up again and re-check current demand from the inside controller.
I ordered a new inside control panel circuit board, but now I'm starting to think the issue may be with the outside panel..
Anyone happen to know what the voltage to the inside panel (Red wire) is supposed to be or what normal current draw is for the inside control panel via the Red wire??
Thx!
Had this issue before. Tinkered with it some (Rpl 9V batt, disconnected spa-side remote, cycled power) and it went away for months.
It's intermittently back again. Thought issue was with the inside controller board. While it was having issues, looking at backside of circuit board, I found a 5V regulator (TO-220 package). Measured incoming voltage via the red wire that's supplied from the outside panel. It was 5.3V or so. Between the red power wire and the 5V regulator there's a power diode, so voltage drops another 0.7V down to 4.6V at the 5V regulator input. Output voltage from the 5V regulator is 4.3 volts. Thinking this is a bit low.
Since it's nice outside today, the controller is of course working perfectly, but wanted to dig a little deeper anyway. Went to outside panel and found the 4-wire bundle from the inside controller. Located the Red wire and measured voltage at the terminal block at 9.85V. Disconnected the Red wire and voltage at terminal block rose to 9.93V. Re-connected the Red wire and voltage dropped back down to 9.85V. Went inside and measured Red wire voltage at 7.58V, so a 2.3V drop over abt 25 ft of wire run. Went back outside and removed the Red wire again and placed an ammeter in-line. Measured the start-up current of the inside control panel at 248mA and after a couple of seconds, it dropped to 128mA and was steady. Using the voltage drop across each end of the Red wire (2.3V) and the current flow (128mA), I calculate ~18 ohms of resistance.
When the inside controller is working good, the 5V regulator has abt 6.8V present at it's input and 5.1V on the output.
To summarize, I believe it's one of 3 possibilities:
1. Inside controller is pulling too much current when it's having issues.
2. Outside control panel isn't supplying sufficient current to maintain the proper voltage.
3. Red wire resistance is excessive intermittently. (seems unlikely)
Suppose I'll have to wait for it to act up again and re-check current demand from the inside controller.
I ordered a new inside control panel circuit board, but now I'm starting to think the issue may be with the outside panel..
Anyone happen to know what the voltage to the inside panel (Red wire) is supposed to be or what normal current draw is for the inside control panel via the Red wire??
Thx!
