20 Most Recent UPM Programmable Outdoor Timer Questions & Answers

Possible steps for similar model 28451: https://www.justanswer.com/electrical/7d6oy-photoelectric-switch-model-28451-use-turning.html

Here is the manual!The Westinghouse 28451 is the exact same timer. I found the manual online.Enjoy!!

Do a Google search on the exact brand and model for mfr. website and support.

ET420C manual is longer than space allowed for free answer.
Moreover, this manual leaves off key steps and is totally unclear, just as you discovered.
http://waterheatertimer.org/pdf/ET420C-Manual.pdf
On-line manual has page numbers, but pages are not in order, so look carefully at page numbers.
http://waterheatertimer.org/UPM-timers-and-manuals.html#ET420C

1) Let me work alongside you while we look go through manual.

2) This timer is simple electronic clock, like alarm clock.
Look at page 3 of manual about setting the clock. (Remember to look carefully at page numbers)
Clock needs to know what time it is at your house right now.
Manual shows 10 steps for setting current time.
You use arrow keys to set clock.

3) Next look at page 4 "program settings"
Use arrow keys to select program number
Program number 1 thru 20 appear on display

In my opinion, it appears that program1 is ON, and program2 is OFF
So program1 will be when you want chlorinator to turn ON
Program2 will be when you want clorinator to turn OFF
The manual is missing this key detail, so look at display to see if it shows program1 ON and program1 OFF ... if the ON and OFF do not display, then timer sets as described above.
Make sure you set same days for ON and OFF times >> if programs have conflicts, then timer will not operate as expected.

How to set programs:
Use arrow keys to select program1 and then press SET
Use arrow keys to select day, and then SET, and then arrow keys to select hour, and then SET, and then arrow keys to select minutes, and then SET.
Repeat steps for program2.

4) Mode appears on page 7 of manual
Again the manual is totally unclear how to set MODE or what buttons are pushed
I have the opinion that you do not set MODE unless you use Countdown or Random feature.
So see if timer operates without setting MODE

5) Add a comment if you get stuck, and I will review manual with you while you push the buttons.
You can add as many comments as needed, and I will respond as needed.

6) For heavy-duty outdoor timer with fewer functions, that is easier to program:
Up to 1/4 Hp, 1000Watts
http://waterheatertimer.org/Woods-timers-and-manuals.html#6-24
http://www.amazon.com/Woods-59403-Heavy-Duty-Outdoor-Digital/dp/B002KS7EOK
Or
http://www.amazon.com/Intermatic-HB800RCL-Seven-Outdoor-Digital/dp/B001KBZUNK

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Also take advantage of fixya expert assistance live.
For a price, expert works with you via e-mail while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Using the right & left arrows, go to CLOCK to set the current time & day.
Press SET
Using arrows, set the day, press SET.
Using arrows, select the hour, press SET.
Select the minute, press SET.
Select the second, press SET.

Using right arrow, press once for program 1.
Press SET.
Select day, press SET.
Select hour, press SET.
Minute, SET.
Repeat this for every day you want this program, five days or seven days,
Programs 1-5 or 1-7.
Gary, good luck, these instructions are difficult.

Manuals for programming UPM timers are each longer than space allowed for free answer:
Open following link to identify your timer, open manual, write out instructions if they seem confusing, re-post question about any specific part of any UPM timer manual, and add exactly which timer you are working with, and add link to that manual so expert can read manual alongside you.
http://waterheatertimer.org/UPM-timers-and-manuals.html

If your timer does not appear on UPM page, add a comment with photo of your product for possible identification by expert.
http://www.fixya.com/support/r6568559-post_photograph_fixya_questions_answers

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Open UPM DT420 manual on following link:
http://waterheatertimer.org/UPM-timers-and-manuals.html#DT420

The manual is longer than allowed for free answer and has important illustrations and options.
Please read the manual in addition to instructions given below.

Copied directly from the manual:
1) Select AUTO using the slide switch
2) Select the desired On-period (2, 4, 6, 8, 10 hours) using the dial switch
3) For continuous Dusk to Dawn operation, Select CONTINUOUS using the dial switch.
Timer turns ON automatically at dusk and turns off according to how you set 1 2 and 3.
If timer does not operate, or if it turns on at odd times, then it is broken.

Note: UPM manuals normally leave out important information, but this particular instruction matches closely with similar products and is probably accurate.

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Fixya does not make timers. We answer questions, for free, and for a price.
UPM makes UMP timers.
GE makes GE timers, etc.

1) My guess is that you move switch to angle line.
This is because other timers have similar instructions, except say move to angle line.

2) In either case, you have 2 options.
Try 1 option, and if that doesn't work, then try other option.
If neither option works, then timer is probably defective.
Most timers have 1 year limited warranty.

3) Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on timer, or any do-it-yourself project.

You posted under UPM timers.
Product photos and Manuals appear on following link:
http://waterheatertimer.org/UPM-timers-and-manuals.html

If your timer does not show on link above, then try following link:
http://waterheatertimer.org/Woods-timers-and-manuals.html

UPM shows ET420C timer
http://waterheatertimer.org/UPM-timers-and-manuals.html

Manual for timer
http://waterheatertimer.org/pdf/ET420C-Manual.pdf