On timer light on

Plug in
make sure bulbs work
rotate dial to set choice of delay times
timer turns on at dusk,,, and delays off for amount of time you choose
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#outdoor

Gene

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It seems like defective control panel

Try it and see what happens.
Occupancy switch turns ON immediately when receiving auditory or electrical signal depending on type of switch.
If you have the occupancy switch wired for 3-way, when more than 1 switch controls same light, then usually the wiring is set up so either switch can operate ... but if somebody just wired in occupancy switch and it was not set up for this specific application, then you have to try it and see what happens.

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Electronic timers are usually 7-day.
Usually a 24-hour timer has mechanical analog dial that rotates as time passes.
Copy following link for instructions by experimenting with features:
http://waterheatertimer.org/How-to-set-timers.html

There are many timers on the market today, including plug-in, box-type, timer modules, delay timers, indoor-outdoor timers, and knock-offs of each brand. Each has different watt load rating that usually appears on side of timer.
Some timers work with any type bulb, and others only with incandescent.
Copy following links to help identify timer.
http://waterheatertimer.org/Intermatic-timers-and-manuals.html
http://waterheatertimer.org/Woods-timers-and-manuals.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

DEI 528T appears to be 12Volt 'wait to start' or ON-delay timer.
528 receives electrical signal, and then delays the start-circuit by up to 60 seconds.
For example home alarm system. Door is opened and alarm sounds. Install DEI 528 and set for 60 seconds: Door is opened and alarm will not sound for 60 seconds.

You need 12-volt off-delay timer.
Off-delay timer receives electrical impulse, and then begins a countdown.
After countdown expires, then circuit turns off.
ELK-960 appears to have off-delay feature for 12V DC
http://www.homesecuritystore.com/p-423-elk-960-delay-timer-module.aspx
Use wiring diagram #7 for alarm cut-off:
http://download.homesecuritystore.com/downloadmanual.aspx?FileName=ELK-960_Install.pdf

You want 3 minute 'off delay' timer.
When timer is energized with push button or momentary electrical signal, circuit remains ON for set amount of time, and then turns OFF.
http://waterheatertimer.org/How-to-wire-Dayton-Off-Delay-Timer.html
Aug 15, 2011 Dayton/ Grainger website is offline

Most delay timers have 1 amp capacity rating, so circuit needs fast acting 1 amp fuse, and timer controls separate relay or contactor unless Load is equal to 100 watt light bulb.

3-minute off delay pin timer
Omron shows 120Volt 8-pin M-series-(minute) 3 minute delay timer
Part number H3CR-H8L 120volt M
http://waterheatertimer.org/pdf/Omron-timers.pdf

Example 240Volt timer showing timer and base.
http://www.sourcingmap.com/ah33-220v-030-minutes-delay-timer-relay-socket-p-119441.html
Wiring diagram shows on side of timer.

Fault in one of the door switches or if thre is timer delay for the lights to dim off then it is short in the control board of the delay switch.
First make sure all the four switches work before you can confirm on the delay timer.

1) The on-off tripper pins might be worn out. Buy new pins
http://www.grainger.com/Grainger/INTERMATIC-Timer-Tripper-2E054?Pid=search

Do you need new pins?
2) The manual override will click on and off with timer. Watch if manual lever is moving to OFF when timer is off ... and moving to ON when timer is on.

3) Timer might be worn out. Click manual override lever back and forth.

Is manual override loose? Or does it click crisp ON and OFF? This test would indicate general wear on timer. If manual override is loose or broken, the tripper pins may pass right over without tripping lever.
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http://waterheatertimer.org/images/WH-lever-005-500.jpg
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http://waterheatertimer.org/images/Back-of-WH40-2b-500.jpg

4) If manual override clicks on and off with timer, and lights stay on, then there might be a short between timer and lights.

Test for short to ground. Turn off power. Inside timer box, disconnect ground wire going to light. Do not disconnect ground wire unless power is off. Turn power back on. If lights are off, then the wire going to light is bad, or a light fixture is bad.

Caution. If there is a short, do NOT touch light fixture when power is on.

There is usually two pre sets; one for time delay before turning on and one for how long it runs for. Have a look

because of the short time this runs then stops, there could be maybe 3 faults, 1 check water inlet valves and supply for water flow 2 check for any motor action (use another programme) 3 check heater element for open circuit number 1 or number 3 sounds most likely hope i have helped, if so rate me please