Results 1 to 11 of 11
  1. #1
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,127

    Mr. Slim p8 code

    Hey all, I'm working on a Mr. Slim heat pump and the code p8 is coming up on the stat.

    Model numbers PUH18EK
    PLH18FK

    The unit will run sometimes for ten to fifteen seconds then shutdown. Then it will run for three minutes or so and cool ok then shutdown with the the p8 code. I found some some problems when I opened the condenser. The cap is weak and only putting out 22mfd when it should be 30. Also the voltage going to the unit is 208 and the transformer was hooked up for 230. I corrected the voltage issue but did not get to the cap because it looks special. I did not have much time to play with it but I noticed while it was running the liquid line started freezing up. When I put my gauges on it the pressure on the high side was around 160. I know these things are a different animal from what I usually work on. Looking for some advise on what could be the problem. I will post some pics in a few.


    Sent from my iPad using Tapatalk HD
    Join http://scopeny.org/ Shooter’s Committee on Political Education

    The world is full of sheep,try not to join the flock.

    Support the Skilled Trades, Don't DIY

  2. #2
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,760
    P8 is an outdoor unit failure code.

    Go to mrslim.com, pull the manual and connect the dots.

    It's the only good way to troubleshoot those wretched things.

  3. #3
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,127
    Name:  ImageUploadedByTapatalk1338169089.509147.jpg
Views: 271
Size:  51.1 KBName:  ImageUploadedByTapatalk1338169133.173277.jpg
Views: 263
Size:  39.0 KBName:  ImageUploadedByTapatalk1338169219.399161.jpg
Views: 279
Size:  56.6 KB

    In the one pic that molex plug that is corroded was not plugged into anything. I could not find what should be plugged into it. While I was reading the manual it said to ohm the temp sensors that are attached to liquid an suction lines but it does not say what values I should be looking for. It also said it could be the board but I don't want to just throw parts at it. Ugh.


    Sent from my iPhone 4s
    using Tapatalk
    Join http://scopeny.org/ Shooter’s Committee on Political Education

    The world is full of sheep,try not to join the flock.

    Support the Skilled Trades, Don't DIY

  4. #4
    Join Date
    Jan 2006
    Location
    Southern MD
    Posts
    5
    Try this
    http://www.mylinkdrive.com/

    got from tech support a while ago. Has helped me a time or two.

  5. #5
    Join Date
    Jan 2007
    Location
    in my lumpy chair
    Posts
    1,951
    Quote Originally Posted by jpsmith1cm View Post

    It's the only good way to troubleshoot those wretched things.
    Before I had any training on them wretched things, I repaired a leak and tried to charge by superheat, sub-cooling, and what the hell is up with the amp draw So I charged it by weight and walked away and confused.
    I dont warranty Tinkeritus

  6. #6
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    1,390
    Quote Originally Posted by qwerty hvac View Post
    Name:  ImageUploadedByTapatalk1338169089.509147.jpg
Views: 271
Size:  51.1 KBName:  ImageUploadedByTapatalk1338169133.173277.jpg
Views: 263
Size:  39.0 KBName:  ImageUploadedByTapatalk1338169219.399161.jpg
Views: 279
Size:  56.6 KB

    In the one pic that molex plug that is corroded was not plugged into anything. I could not find what should be plugged into it. While I was reading the manual it said to ohm the temp sensors that are attached to liquid an suction lines but it does not say what values I should be looking for. It also said it could be the board but I don't want to just throw parts at it. Ugh.


    Sent from my iPhone 4s
    using Tapatalk
    The Molex plug is for a second condenser motor, the head pressure is way too low, low and high pressures should be in range with a regular R-22 Ac unit, nothing special about it.

    the thermistors should read between 4.3-9.6Kohms with outdoor temp ranging from 50 to 86F

    Look for a restriction in the liquid line strainer, they are bullet type,hard to spot sometimes, common problem with them units.

  7. #7
    Join Date
    Jul 2004
    Location
    Massachusetts
    Posts
    6,837
    Does this help?
    Attached Images Attached Images
    If YOU want change, YOU have to first change.

    If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!

  8. #8
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,127
    Quote Originally Posted by skippedover View Post
    Does this help?
    Thanks for that. I have been reading through one already.


    Sent from my iPad using Tapatalk HD
    Join http://scopeny.org/ Shooter’s Committee on Political Education

    The world is full of sheep,try not to join the flock.

    Support the Skilled Trades, Don't DIY

  9. #9
    Join Date
    Feb 2005
    Posts
    284
    i believe fault code 8 is for low temperature at evap. coil, i had 2 to do this and found strainer and cap. tube assy. at evap. clogged

  10. #10
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,127
    Quote Originally Posted by joebear View Post
    i believe fault code 8 is for low temperature at evap. coil, i had 2 to do this and found strainer and cap. tube assy. at evap. clogged
    Thanks Joe I will check that out when I get time to go back. This just serves one office so it is not a huge rush.


    Sent from my iPhone 4s
    using Tapatalk
    Join http://scopeny.org/ Shooter’s Committee on Political Education

    The world is full of sheep,try not to join the flock.

    Support the Skilled Trades, Don't DIY

  11. #11
    Join Date
    Dec 2006
    Location
    new england
    Posts
    627
    I had the 8 code a few times. Found the unit low on charge (leak).

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event