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Thread: Auto Defrosting
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24-01-2013, 10:52 PM #1
Auto Defrosting
Hi all,
Got a quick question about air con. I do mostly refrigeration, but have been asked to have a quick look at the air con at my partners work. All they have said so far, is when both units are switched on, they just flash auto-defrost.....
Any idea what this means?
Many thanks
Matt
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24-01-2013, 11:01 PM #2
Re: Auto Defrosting
make,model, run it in cooling check running pressures
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24-01-2013, 11:21 PM #3
Re: Auto Defrosting
Most likely a lack of refrigerant.
The defrost symbol on most A/C systems are the same as the pre heat symbol. If the indoor coil fails to reach a certain temperature (between 35 & 45ºC depending on make and model) the unit will stay on pre-heat/defrost.
Other things to check includes free airflow around outdoor unit, outdoor unit's fan running and outdoor unit's coil clean/free of ice.
But if it looks OK then the next thing to do is to reclaim and check the charge.
Good Luck
.
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24-01-2013, 11:42 PM #4
Re: Auto Defrosting
Hiya
Thanks for the advice... Haven't been there yet to get details, but will post when I get there. It was installed about 4 months ago, but they cant get hold of the company who put it in
Many thanks