How to set the defrost duration on a timer - Paragon 8145-20 Defrost Timer

Probably low on refridgerant. Time to call a refridgeration engineer in.

If the defrost timer is not working properly the unit will not defrost and icing will occur along with poor refrigeration. If the timer is fine check the defrost thermostat that turns the unit back on when a certain temp is reached. If it goes off prematurely to offset the timer duration that will also short cycle the defrost operation and cause issues you are experiencing.

Copy following links:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#set
http://waterheatertimer.org/images/8145-work-image.jpg

Install defrost trippers on dial at times you want defrost to begin.
8145-20 is generally time initiated, and temperature or pressure terminated... but you can set the defrost duration on smaller center dial..and this setting will terminated defrost cycle mechanically if the pressure or temperature sensor fail. Then manually rotate timer dial until current time lines up with time marker in upper left side.

Gene
h.

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

10-30-12
Smith's ETU02 timer does not appear on the Smith's manual page:
http://www.tlc-direct.co.uk/Technical/DataSheets/Smiths/Index.htm

Other sites report this 7-day digital timer is discontinued, but can be replaced with similar timer from local box store locally.

Another option is to search following page for same-similar timer that might yield a manual similar to your timer.
http://waterheatertimer.org/Woods-timers-and-manuals.html#6-week

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

Good day,
The decision as what the time interval of a timer should be is determined by engineers and field tests.
There is more to the timer than interval. Timers are usually listed as 8 hours 21 minutes, 8 hours 30 minutes ect. The minutes is used to designate the time the control stays in defrost.
A general rule is if the interval is longer, the minutes in the defrost cycle is extended to compensate.
Other factors come into play such as the wattage of the defrost heaters and the defrost thermostat temperature.

The trend today, with timers is to extend the interval to make the machine more energy efficient.

There is never an issue to defrost more often then the original, but it will run the heaters more often, and cause increased operating cost and shortened heater life.
The short and long of it is you can use a 6 hour timer in any machine if the timer motor wiring is the same and the duration is long enough, but with the costs listed above.

Sounds more like it's been set to do that. Use the following to shut off the timer mode. It's possible that the set is set to the wrong time of day but that is unlikely. You can shut off the timer mode using the on screen menu. Follow the instructions below.

Using the Timer Menu
Current Time Set your TV to the current day and time. Press to open the Current
Time menu:
1 Use the F or f buttons to enter the correct day and time, then press
.
2 Press to exit the menu.
Timer 1 and
Timer 2
Scheduled
viewing
Use the timers to program your TV to turn on and off by day, time,
duration, and channel. The timer duration is a maximum of six hours.
When the channel is fixed, it is not necessary to set the channel.
1 Use the F or f buttons to highlight Timer 1 or Timer 2, then press
.
2 Use the F or f buttons to enter the desired day, start time, duration,
and channel, then press . The timer status should be On when the
Timer has been set, and the timer light on the front panel of the TV
should be on.
3 Press to exit the menu.
? When you perform Auto Program, Timer 1 and Timer 2 settings will be cleared. Also, in the event of
any loss of power, Current Time, Timer 1, and Timer 2 settings will be cleared

Hi, sounds like your defrost clock is stuck in the defrost mode. On most true boxes they have a paragon defrost clock with adjustable pins you can set the amount of cycles and duration of the defrost cycle. Find the clock and give it a turn in the direction of the arrow or cw. It will come out of defrost and start to freeze again. If it continues, you may need a new clock. Let me know what you find. Keep me posted. True boxes are top of the line
Sincerely,
Shastalaker7

Melnor 604F Instructions (from Label on unit)All indicator light flashing - replace 9V battery inside unit
1. To Start - turn dial to Off and press Enter.
2. Set Time - set current time and press Enter (Yellow ring).
3. Set Start Time - Set time to start first irrigation cycle (Yellow ring) and press Enter.
4. Frequency - Set frequency of irrigation cycle; e.g., twice a day set 12 h. (red sector ring) and press Enter
5. Duration - Set duration of cycle (Green band) minutes and press Enter.
----------
To change duration - turn dial to new duration and press enter.
To turn water on manually - Turn dial to ON position, water will turn off in 30 min.
Do not press enter in the OFF position as the unit will clear program. You will have to reprogram unit
via steps 2-5 above.

If the air flow and temperature are not being compromised leave it alone. If there is a gradual build up of ice on the evaporator you may have a defrost element or defrost limit switch problem. Set the defrost duration duration to 45 minutes and see if that solves the icing problem. 4 defrost cycles a day should be enough to keep the icing problem at bay. 3 defrost cycles at night about 1 hour apart may also remedy the problem. Experiment until you find the right combination of defrost cycles for your freezer. Watch for any thawing of the product in the freezer and adjust accordingly.
Bills Refrigeration/Montana.

Having to manually defrost an automatic defrost system tells me there is a problem with your defrost timer. Most Beverage-air freezers have a Paragon timer. There are two dials on these timers. An inner and outer dial. On the inner dial is an arrow to indicate the direction of rotation as counter clock wise. On the inner dial is a copper pointer indicating duration of the defrost cycle.

Observe the copper pointer, no movement indicates that the timer is bad.