Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Heat Pump Bypass Problem

  1. Back To Top    #1

    Heat Pump Bypass Problem

    I need some forum help. I installed a Pentair Thermalflo heat pump and have been trouble shooting since it was first turn on. I will try to keep my narrative short while including what has already been done.
    The error code that shuts down the unit is "high refrigerant pressure." I researched this on TFP and other open source media. I had an HVAC tech check my refrigerant levels. The gauges showed the heat pump high pressure switch was breaking the 24 volt current when pressure reached 450. The tech said it should be around 300. Thus, my water flow through the coils appears to be too week to keep the high pressure switch from tripping. My GPM flow is between 50 and 75 (which is within proper range for my unit). I do not have a air leak on the suction side. My clean filter pressure is 15psi.
    I used a drain bladder and blew out the coils (in case something made it's way into the heat pump coils and was restricting water flow). That didn't help.
    Could the internal check valve be somehow broken? That is pretty much all that is left for me to inspect. If the check valve is letting too much water through it, then I suppose it could relieve water pressure and flow through the coils.
    How could I tell? If it is broken, then how do I fix it? The check valve is plumped into the OEM pipes connecting the unions to the coils.
    18k IG, Bean Shaped, Hayward SP3400VSP, Autopilot Nano SWG, Pentair Thermalflo HP 500, Hayward Sand Filter S-240, Aquabot Mark V.

  2. Back To Top    #2
    Casey's Avatar
    Join Date
    Apr 2007
    Location
    SW PA
    Posts
    10,157

    Re: Heat Pump Bypass Problem

    I wish I could offer you answers but someone should be able too! Lets
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  3. Back To Top    #3

    Re: Heat Pump Bypass Problem

    I changed my search criteria (for research) and have found plenty of information on stuck check valves. If that is not the cause, I guess I start over on my checklist of potential causes.
    18k IG, Bean Shaped, Hayward SP3400VSP, Autopilot Nano SWG, Pentair Thermalflo HP 500, Hayward Sand Filter S-240, Aquabot Mark V.

  4. Back To Top    #4

    Re: Heat Pump Bypass Problem

    Casey,
    Just so this thread can be put to rest (even though I didn't get much help) I did solve my problem. I read on an unrelated post that running the variable speed pump with the multiport valve set to recirculate, clears up air in the pipes and pump filter basket. I tried that tonight and my heat pump has now been shooting out hot water for 2 hours! Me happy.
    18k IG, Bean Shaped, Hayward SP3400VSP, Autopilot Nano SWG, Pentair Thermalflo HP 500, Hayward Sand Filter S-240, Aquabot Mark V.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •