Question about Ruud UBHC Air Conditioner
The unit works fine in cooling mode but when you switch over into heating mode. The compressor internal check valve opens.
and the compressor still runs at about half its amp draw but does not pump any refrigerant. the indoor unit it is a split face coil with two buy direction txv. Very long pipe run, the suction line was a little under size but I check the pressure drop. scroll compressors.
Check the true psi with the line psi to see if same if psi is good in cooling 225 hi and 70 low on 80'day then compressor is fine and i would start checking for temp difference on the reversing valve sometimes this will cause high suction or high discharge psi shift it manually with by energising it be cooling or heating then pull wire and see how it shifts if shifts good then txv on out door unit could be bad what is the psi in heating on the discharge line going to the indoor unit? most prv's are set at about 350 psi r22 as for suction line size its only hot gas in hp mode os no problem their shows in cooling mode as low suction psi ..hope this helps some also make sure indoor coil is clean!....thanks & rate me
Posted on May 11, 2009
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Posted on Jan 02, 2017
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