Results 1 to 4 of 4
  1. #1
    Join Date
    May 2006
    Location
    Sussex
    Posts
    364
    Rep Power
    20

    Trouble with Hitachi splits RAK50PED & RAC50WED



    Had an engineer install two Hitachi 5kw R32 splits RAK50PED & RAC50WED. Just a straight 5m and 6m run with the flares outside. Quite a simple install..... but when tested with 450psi ofn, both systems were losing pressure (30psi/15psi) in 10mins. Flares checked and rechecked (leak spray) and engineer worked out that service valves were letting by. Both systems!

    The distributor (H) is not showing any interest and quite awkward about it, sounding like his responsibility will extend only as far sending a couple of service valves (if lucky) so I can fix the problem this has caused (great).

    The kit was on special prices and whilst there is the buy-cheap-buy-twice chime in the background, I had expected more from the Hitachi brand (and that distributor).

    Anyone else had issues with service valves letting by?



  2. #2
    Join Date
    Apr 2008
    Location
    Southampton, England
    Age
    49
    Posts
    1,045
    Rep Power
    35

    Re: Trouble with Hitachi splits RAK50PED & RAC50WED

    Several years back but not so much these days.

  3. #3
    Join Date
    Mar 2001
    Location
    ireland
    Age
    53
    Posts
    1,471
    Rep Power
    41

    Re: Trouble with Hitachi splits RAK50PED & RAC50WED

    Yes and particularly with Hitachi, there early 410a had a service bulletin issued which if i remember right said we should not subject the service valves to high pressure, ie test pipe work only!

    Have never had an issue with any other brand
    Mostly found in the southern part of this green and pleasant land.

  4. #4
    Join Date
    Mar 2005
    Location
    Birmingham U.K.
    Age
    70
    Posts
    54
    Rep Power
    20

    Re: Trouble with Hitachi splits RAK50PED & RAC50WED

    I would be interested to know how you have tightened up the flares on the outdoor unit.
    Did you have a adjustable spanner holding the shut off valve and another spanner on the flare nut or did you tighten the flare just using the one spanner on the flare nut.

    I have sometimes caused the shut off valve to leak refrigerant through when using both spanner’s and now only tighten up the flare to the correct setting using one shifter on the flare nut.
    This of would only be on the smaller condensing units up to 5kw 1/4 -3/8 and 1/2 pipes

    Regards bob

Tags for this Thread

Posting Permissions

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