View Full Version : the Low is Hi
07-11-2005, 10:54 PM
need some help,split system 2.5 ton the condensing unit
is clean so is the evap coil and the indoor blower.
The outside temp is 93F,suply air 67F return
air 80F hi side psi 220 lo side psi 90 psi,
Where would be the problem since the low side
is at 90psi?
thanks for any help.
tinknocker service tech
07-11-2005, 11:05 PM
may not be a problem
heavy load and the suction presure may drop to normal as the inside load drops
07-11-2005, 11:25 PM
Sounds like an oversized metering issue. At those load conditions the head is also low. What are the condensing unit and indoor coil models?
07-11-2005, 11:34 PM
93°F and 220 psi? kinda low
67°F and 90 psi?
low charge and vapor at the restrictor or wrong size restrictor?
ÄT = 13°
07-11-2005, 11:51 PM
What are the superheat and subcooling
We ALWAYS need the superheat and subcooling. Without them, we can't even make an informed guess about what the problem is...
Knowing what type of metering device the indoor coil has is handy info too.
07-12-2005, 07:22 AM
Once you get that superheat and subcool measurements,you have to check that airflow.....13 degree delta t is way low.Busted ductwork,wrong fan speed,etc.
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.