ACdiag
17-02-2017, 08:52 AM
Hi people , i installed an R22 split system a week ago , it has stopped pumping heat .
The system worked fine at day one , plenty of hot air coming off the outdoor unit , indoor temps chilled down nicely to 16 celcius.
after a week of running it is no longer producing the cold stuff inside and the outdoor unit is blowing only ambient air.
i checked all the flared connections and its not showing leaks anywhere.
when first installed i pulled vacuum down to minus 30 and held it for over an hour , it showed zero leakage then.
There is only 2.5 metres of copper , its a pregassed unit that can handle up to 3 meters copper before adding additional gas.
a gauge set on the service port today (low side) shows 140 PSI (0.96 MPa)when the unit is turned off , when powered up it shows only 8 PSI.
spec sheet says only that maximum pressure on the low side is 1.2 MPa and high side 2.8 MPa but doesnt give a minimum figure.
any thoughts on the pressure readings ?
there are no gauge ports on the high pressure side so i cant check that.
The system worked fine at day one , plenty of hot air coming off the outdoor unit , indoor temps chilled down nicely to 16 celcius.
after a week of running it is no longer producing the cold stuff inside and the outdoor unit is blowing only ambient air.
i checked all the flared connections and its not showing leaks anywhere.
when first installed i pulled vacuum down to minus 30 and held it for over an hour , it showed zero leakage then.
There is only 2.5 metres of copper , its a pregassed unit that can handle up to 3 meters copper before adding additional gas.
a gauge set on the service port today (low side) shows 140 PSI (0.96 MPa)when the unit is turned off , when powered up it shows only 8 PSI.
spec sheet says only that maximum pressure on the low side is 1.2 MPa and high side 2.8 MPa but doesnt give a minimum figure.
any thoughts on the pressure readings ?
there are no gauge ports on the high pressure side so i cant check that.