Author Topic: EEVblog #1360 - REPAIR - Aircon Control Panel  (Read 1371 times)

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Online EEVblog

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EEVblog #1360 - REPAIR - Aircon Control Panel
« on: December 29, 2020, 01:55:16 pm »
Dave's lab aircon control panel has been dodgy for years, time to finally fix it!
A simple fault with rather interesting and complicated set of a symptoms based on a (poor?) design decision.


 

Offline CChin254

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Re: EEVblog #1360 - REPAIR - Aircon Control Panel
« Reply #1 on: December 31, 2020, 08:52:15 pm »
IC Identification if y'all are interested in one image:
[attachimg=1]
 
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Offline tkamiya

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Re: EEVblog #1360 - REPAIR - Aircon Control Panel
« Reply #2 on: January 03, 2021, 02:38:42 pm »
COOL/ELEC is for traditional air conditioner / resistive heating element setup.  Heatpump is more recent heating where flow of freon is reversed.
 

Offline jnissen

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Re: EEVblog #1360 - REPAIR - Aircon Control Panel
« Reply #3 on: January 04, 2021, 07:51:07 pm »
The reason it went to run after you cycled it quickly is to allow the compressor in the AC to equalize pressure so it isn't trying to start under the high head pressure.  Standard to have delays if it short cycle ran for only a few seconds or minute or two. Protects the compressor from over current condition where you hear the thermal snap switch kick in and out!
 

Offline Kuber

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Re: EEVblog #1360 - REPAIR - Aircon Control Panel
« Reply #4 on: January 14, 2021, 01:33:30 pm »
Just wondering if you checked the rest of the switches while you had it apart? 
 


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