Intermatic Timers: Clocks not working

[SBond530]

I know, you've seen it before, but I haven't found a solution. I have two timers, one for the filter and one for the sweep. The filter pump was replaced w a VFD a few years ago and I'm wondering if they wired the timers incorrectly. The clocks haven't functioned properly for quite a while, but I can't be sure when they stopped working.
Today I replaced both timers, assuming they were faulty, and rewired them exactly as before. In this photo, the filter is the left timer (which isn't used as the the drive is programmable) and the sweep is the right. The only change to the wiring I did later in the afternoon was to wire the sweep clock to the sweep timer, not as it was previously - to the filter timer. The sweep works when I use the Off/On switch, but the clock doesn't run. Could I have somehow fried both clocks?

 

[Richard320]

All I can think of is that you might be feeding 120V in the same phase to both sides of the motor, which means zero voltage difference and it won;t run. Two blue wires switched would do it.

 

[SBond530]

Thanks, Richard. I'll trace the blue wires and see if that's the case. Would the sweep motor run though if it was?

 

[ajw22]

What is the model number of those timer mechanisms?

 

[SBond530]

What is the model number of those timer mechanisms?

Intermatic T103

 

[ajw22]

Intermatic T103

Has a 120V clock. I can’t tell exactly but it looks like the power to the timer is 240V.

See the wiring diagram at

https://www.intermatic.com/-/media/inriver/15610-9479.ashx/T103%20Instructions%20EN

Wire the clock white wires to A and 1. Connect a white wire from the neutral bus to the A screw.

 

[SBond530]

Has a 120V clock. I can’t tell exactly but it looks like the power to the timer is 240V.

See the wiring diagram at

https://www.intermatic.com/-/media/inriver/15610-9479.ashx/T103%20Instructions%20EN

Wire the clock white wires to A and 1. Connect a white wire from the neutral bus to the A screw.

Oh, I like that. Could I have fried the clocks? I guess I'll find out. Heading outside to do it now. Thanks!

So, add a wire like this, but to both timers?

 

[ajw22]

Oh, I like that. Could I have fried the clocks? I guess I'll find out. Heading outside to do it now. Thanks!

So, add a wire like this, but to both timers?
View attachment 140782

Yes.

 

[SBond530]

O

Oh, I like that. Could I have fried the clocks? I guess I'll find out. Heading outside to do it now. Thanks!

So, add a wire like this, but to both timers?
View attachment 140782

OK. The two timers I bought at the Depot had 110V clocks, whereas the originals had 208V. I wired one clock correctly and it didn't run, so I guess I fried it. Oddly, I tested one of the 208 clocks and it seemed to run where it didn't before (which is why this all started). I'll replace clocks and report back. Thanks for the help.

 

[ajw22]

If you are replacing the mechanism get the T104M that has the 240V clocks.

Timers - Further Reading

www.troublefreepool.com