cablehack
Compressor timer for Monitor Top
I built up this unit to prevent damage to my Monitor Top(s) should there be a fault which causes the compressor to run continuously.
In fact, most refrigeration faults will cause this.
The current transformer senses when the compressor runs. When it does so, the Omron timer module starts. If the compressor should be running when it counts up to 25 mins, power is shut off to the fridge. It has to be manually reset.
Each time the compressor stops the timer resets, so normally the timer has no effect on fridge operation. Normal run time is much less than 25 mins. (About 2-3 mins once stabilised).
It's a very rough prototype just to prove the concept and eventually it will rebuilt somewhat more professionally. The improved version will also sense the current draw and trip if it's too high, thus providing a backup to the solder pot overload in the control.
Compressor timer for Monitor Top
I built up this unit to prevent damage to my Monitor Top(s) should there be a fault which causes the compressor to run continuously.
In fact, most refrigeration faults will cause this.
The current transformer senses when the compressor runs. When it does so, the Omron timer module starts. If the compressor should be running when it counts up to 25 mins, power is shut off to the fridge. It has to be manually reset.
Each time the compressor stops the timer resets, so normally the timer has no effect on fridge operation. Normal run time is much less than 25 mins. (About 2-3 mins once stabilised).
It's a very rough prototype just to prove the concept and eventually it will rebuilt somewhat more professionally. The improved version will also sense the current draw and trip if it's too high, thus providing a backup to the solder pot overload in the control.