Will low voltage hurt my AC compressor?

Discussion in 'Heating / Cooling Systems' started by nancyanddan, May 4, 2014.

  1. nancyanddan

    nancyanddan Active Member

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    Our neighbor at the campground this weekend said the campground voltage is down to 105 volts. He recommended we turn off our AC to avoid damaging the compressor. Other folks on this row had turned off their AC. Our Coleman Mach AC Manual says the unit Is designed for 115 volts. So the question is: will running it at a lower voltage damage the compressor?

    Thanks in advance for any info!
     
  2. efehser

    efehser New Member

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    Re: Will low voltage hurt my AC compressor?

    Yes, It can.
     
  3. rabird

    rabird Howdy!

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    1. Measure Line Voltage To The A/C
    Line voltage should be checked at the
    unit where the coach wiring connects to the
    air conditioner while the air conditioner is
    running. The correct operating range is
    between 103.5 and 126.5 VAC.

    http://www.rvcomfort.com/pdf_documents/Evaluating_AC_Performance.pdf

    Low voltage causes the current to increase, if it increases over the motor's rated current it will cause too much heat that can cause damage.
     
  4. bfahs

    bfahs Member

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    As the voltage drops, your motor will run hotter and can damage the insulation. So yes it can hurt.
     
  5. nancyanddan

    nancyanddan Active Member

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    Thanks, everyone. Looks like we'll be getting a voltmeter. :)
     
  6. rabird

    rabird Howdy!

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    I'm a fan of something like a kill a watt meter, but it won't accept a 20A plug. You could use it on another outlet as a monitor while the a/c is operating.
     
  7. novagirl

    novagirl retired camper

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    We got a surge protector that will shut off if there is a problem.
     
  8. bfahs

    bfahs Member

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    I don't think a surge protector will help in a low voltage situation. It will help in a high voltage surge.
     
  9. efehser

    efehser New Member

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    A good RV surge protector will guard against both high and low voltage situations. You can get plug in types, but I would have one hard wired into the camper.

    Like this


    Feeding the addiction one post at a time with Tapatalk
     
  10. novagirl

    novagirl retired camper

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    Yes..ours is hard wired into our trailer. It shuts everything off if it detects low voltage too. It is made by Progressive Industries and came highly recommended.

    Sent from my KFTHWI using Tapatalk HD
     
  11. Rusty

    Rusty Don't worry, everything has a way of working out.

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    [RTM] Surge/Low voltage protector X3. You will damage the AC unit with low voltage, we lost a roof top unit due to low voltage ... I wont let that happen again. Get one, you wont regret it. [2C]
     
  12. nancyanddan

    nancyanddan Active Member

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    So I assume a 30 amp surge protector would be adequate for our pup? Looks like I'll be doing some extensive research to find what will best suit our needs. Definitely have to get one before our cross-country trip this summer.
     
  13. Rusty

    Rusty Don't worry, everything has a way of working out.

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    Yes, a 30 amp unit will do the trick. My protector does several checks before the green light is given and power goes through to the PUP. I believe it is one of the best investments I ever made. Sometimes you can get a protector on Craigslist, but they do not come up often. Make sure you get one that protects for low voltage, IMO it is a bigger issue that a spike... [2C]
     
  14. novagirl

    novagirl retired camper

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    Progressive Industries
     
  15. nancyanddan

    nancyanddan Active Member

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    Just ordered from Amazon: TRC 34520 Surge Guard 30-Amp Hardwire and also a Camco 40055 Brass Water Pressure Regulator. :)
     

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