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07-21-2020, 10:38 AM
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#1
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Junior Member
Join Date: Jul 2020
Location: Charlotte
Posts: 1
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Weird AC Issue
I own a brand new 2020 Keystone Hideout 262LHS with a Coleman Mach A/C unit, and this past weekend, something crazy happened. In Central NC, the summers are pretty humid and hot. We were laying in the bed and noticed that the air flow was lacking from the vents, and the air was not "cold." I could tell that the unit was only blowing fan air, and not much of it. I checked a few things and finally gave up for the night as it was close to midnight. A few minutes later, we heard what was a high pitch "beep" for a few seconds, then the compressor kicked in, the fan had much more output, and all was good. I cannot replicate the issue. Is this something that others have experienced?
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07-21-2020, 11:13 AM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,237
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Welcome to the forum
Turn off the AC. Then unplug from shore power, and have someone stand in front of the microwave when you plug it back in. That may be the beep you heard. If so then I’m wondering if you didn’t experience an outage. Even a tiny one can make the AC compressor motor start back up for 10-15 minutes.
I’m just thinking out loud here.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-21-2020, 11:19 AM
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#3
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,456
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Quote:
Originally Posted by chuckster57
Welcome to the forum
Turn off the AC. Then unplug from shore power, and have someone stand in front of the microwave when you plug it back in. That may be the beep you heard. If so then I’m wondering if you didn’t experience an outage. Even a tiny one can make the AC compressor motor start back up for 10-15 minutes.
I’m just thinking out loud here.
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Another reason I have a hardwired EMS...
__________________
2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-21-2020, 11:39 AM
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#4
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,714
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^^^ what he said. an EMS (energy management system) will monitor the incoming power. If there is an issue such as missing a connection to ground, or neutral, or excessively low voltage, it will shut the power off to protect the appliances from incurring damage. The a/c units, fridge, water heater, etc. can be damaged from brown outs (low voltage) and from power cycling (like your lights at home flickering during a bad storm) by disconnecting the power and not restoring it until the power is stable. Then when it is stable it will have a delay before energizing to protect the a/c compressor.
Don't confuse an EMS with a surge protector. Surge protectors are useless.
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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07-21-2020, 11:48 AM
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#5
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Senior Member
Join Date: Oct 2018
Location: Sacramento
Posts: 1,005
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I too think it sounds like you experienced a brown-out. These can be really dangerous for motorized appliances (like the air conditioner) as the motors draw more current as the voltage goes lower.
I have a Progressive hard-wired HW30C EMS (electrical management system) and would never want to be without it. If you did have a brown-out and stuff didn't break, you're quite lucky.
__________________
2022 Cedar Creek Champagne 38EL - "Big Bertha"
2019 GMC Sierra 3500 Denali HD 6.6L Duramax TD, CC, 4WD, DRW - "Mr. Beefy"
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07-21-2020, 11:49 AM
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#6
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Senior Member
Join Date: Oct 2018
Location: Sacramento
Posts: 1,005
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Oh, and welcome to the forum!
__________________
2022 Cedar Creek Champagne 38EL - "Big Bertha"
2019 GMC Sierra 3500 Denali HD 6.6L Duramax TD, CC, 4WD, DRW - "Mr. Beefy"
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