Yesterday i was doing a routine maintenance visit to one of the sites that we look after and i decided to use my new digital gauges and measure superheat and subcooling to see if the system was running ok.
There are 6 daikin condensors that each feed a cooling coil on seperate Air Haundling units, i switched the controllers onto manual cooling which brought on the condensors.
On one of the condensors that i connected my gauges to i got the following readings
suction pressure- 2.52 bar -10.2degC
Superheat was 18K
Liquid pressure- 10.5bar 28degC
subcooling was 7K.
Why was the suction pressur so low was it because there wasn't much if any load?
and also the subcooling seems ok but the superheat is high, would the lack of load alter the SH/SC?
If not then it looks like there is either a restriction or the TXV isn't open enough, am i right?