Compressor Relay toggling!

Thread Starter

Theevan Venugopal

Joined Dec 30, 2015
19
Hi guys
Am working in a project where a compressor and a condenser switch ON and OFF by sensing ice formation using 3 probes,one for providing PWM signals, other for sensing water and the last one for sensing ice. Every thing works fine but at the time when the ice reaches the ice sensing probe the relay which controls the compressor and condenser is not switching off, it toggles. How to recover from this? Any ideas from you guys?!
 

jpanhalt

Joined Jan 18, 2008
11,087
How about installing a timer at the ice sensor, so once triggered, it will not restart until most of the ice has melted. An "ice-gone" switch would do the same thing. Wherever the ice is forming, you could use a temperature probe to be sure it is above some limit before restarting. Ford does something like that on its auto air conditioners.

John
 

AnalogKid

Joined Aug 1, 2013
11,121
Has the system always done this, or is this a new condition? If this is new, then something in the controller probably has died or drifted out of calibration.

Also, how fast is the relay toggling? Very slowly (tick...tick...tick) or quickly like a buzzer are two very different conditions.

ak
 

Thread Starter

Theevan Venugopal

Joined Dec 30, 2015
19
Thank you all for your support guys #R!f@@ #AK #John... i got solution for this....planned to implement hysteresis based circuit. so that the toggling can be avoided...... Good Day!!!
 
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