a customer call no ac.when i got to the customer house, I found the evaperoter totally iced. defrost the ice. it is a heat pump. I hooked the gage. the low side is only 40 psig, more than 40 supreheating.high side 220 psig, the subcooling is almost 0( Maybe I measureed not accurate). is it undercharge or capilary tube restricted?
[Edited by comfortable air on 07-12-2005 at 07:39 PM]