Job Description: Replace High Pressure Switch and Sensor on a Mitsubishi- PUHY
Area: High Holborn, London
Issue Identified: Following a recent call out to site our engineer noted that the unit was very short on refrigerant. Our engineer also checked the high-pressure switches and found they were out of calibration.
Works carried out:
- Isolated the Mitsubishi PUHY Unit electrically and mechanically.
- Recovered refrigerant from the Mitsubishi PUHY Unit into a dedicated recovery cylinder.
- Checked and confirmed charge.
- Replaced the high-pressure switch and sensor.
- Pressure tested with (oxygen free nitrogen) OFN.
- Located the leak and repaired by means of tightening.
- Re-charged the unit with (oxygen free nitrogen) OFN to confirm the unit is leak tight.
- Once proved released (oxygen free nitrogen) OFN to atmosphere and evacuated system to a minimum of 2 Torr.
- Re-charged with virgin refrigerant.
- Test ran and re-commissioned.
- Completed waste transfer note and handed to on-site representative.
- Completed F Gas certificate.