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Old 06-23-2013, 04:34 PM   #1
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Roof AC

Have a weird problem with my roof AC. I have a 97 Ford Conquest Classic by Gulfstream. When my AC unit is running and I turn on any of the lights it kicks off the AC unit and I have to wait a period of time before it turns back on. I suspect something in the DC converter but don't want to start swapping out parts and was hoping someone has run in to this problem and may have the solution... I have a new battery and it does charge correctly. Any ideas?
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Old 06-23-2013, 05:07 PM   #2
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Sounds like your thermostat and control circuit are powered by 12 VDC power. Turning one lights which are on 12 volts also, causes a voltage dip that is low enough to drop off the control power to the unit. Check your voltage to the A/C control while turning on the lights. You may have a loose connection in the control circuit, a bad power converter and / or weak batteries.

Ken
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Old 06-23-2013, 08:10 PM   #3
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Thanks for the advice. I suspected the converter as I had just replaced the battery early this year. I also checked all the wiring and found a couple of loose wires I thought was the problem but after fixing them the problem still remained. Any advice on where the best place to but a new converter might be?
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Old 06-23-2013, 09:09 PM   #4
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I like the IOTA series of converters.
http://www.iotaengineering.com/Power/iotappguide12.pdf

Ken
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Old 06-24-2013, 05:43 AM   #5
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I favor Progressive Dynamics 9200... as a converter myself.

The IOTA with IQ-4 is... Very close however.

My suggestion is to measure the battery voltage. first at the battery then somewhere else (Say the fuse box) if the battery voltage is low, charge, and perhaps replace the batteries (Test them first).

If the battery is good but the remote voltage drops when yo light up.... Bad connection.
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