CraigF
02-01-2015, 08:37 PM
Hi all,
Went to have a look at a 7kw mitsi electric cassette unit today (PUHZ-ZRP71VHA) store complains unit will not heat effectively. Attached gauges and registered 18 bar discharge. Thought this was a bit low and had had the heads up that it was only installed 1 yr ago by a technician who was an electrician.... So, first things first I pulled out 2.5 kg from a 3.5kg system. Short of gas straight away... Pressure tested and found leakage at all flares. Repaired and vacced to 1.75 torr and recharged with fresh 410A. Ran the unit up in test, the results I got are as follows,
Run amps (total) 5.1a
Air on indoor 18.5c
Air off 32.5c
Comp discharge Temp 47.5c (after one hour running)seemed very cold initially
Discharge pressure 20 bar on the nose.
Suction 8.5bar
Pipe temp on service display 33c
The solenoid on 4 way is operational.
These all seem a little low to me tbh, am I going down the route of compressor or 4 way valve???? Mitsubishi elec don't seem to have many ideas on this, and ran out of time today, any thoughts on a remedy? Or any other points to check?
Thanks in advance!!
Went to have a look at a 7kw mitsi electric cassette unit today (PUHZ-ZRP71VHA) store complains unit will not heat effectively. Attached gauges and registered 18 bar discharge. Thought this was a bit low and had had the heads up that it was only installed 1 yr ago by a technician who was an electrician.... So, first things first I pulled out 2.5 kg from a 3.5kg system. Short of gas straight away... Pressure tested and found leakage at all flares. Repaired and vacced to 1.75 torr and recharged with fresh 410A. Ran the unit up in test, the results I got are as follows,
Run amps (total) 5.1a
Air on indoor 18.5c
Air off 32.5c
Comp discharge Temp 47.5c (after one hour running)seemed very cold initially
Discharge pressure 20 bar on the nose.
Suction 8.5bar
Pipe temp on service display 33c
The solenoid on 4 way is operational.
These all seem a little low to me tbh, am I going down the route of compressor or 4 way valve???? Mitsubishi elec don't seem to have many ideas on this, and ran out of time today, any thoughts on a remedy? Or any other points to check?
Thanks in advance!!