Pressure Leak Test (PLT) on Daikin VRV System
Job Description: Pressure Leak Test (PLT) on Daikin VRV System
Area: Duke Street, London
Issue Identified: Following a recent call out to the site for U9 fault, the engineer checked and cleared the fault. Once he started turning the units back on a new fault was noted on display. The new fault was U0, this fault is a low refrigerant warning. The engineer checked the running pressures, and they were low. The unit required a pressure leak test to investigate the location of the leak.
Works carried out:
- Recovered any remaining refrigerant from the Daikin VRV into the certified cylinder.
- Weighed and confirmed the system charges.
- Charged the system with OFN (oxygen free nitrogen).
- Leaks found and repaired by means of tightening.
- Once proven the unit was leak-tight we released the nitrogen.
- Evacuated system to a minimum of 2 Torr.
- Re-charged the unit with virgin refrigerant.
- Test ran and re-commissioned.
- Completed all waste paperwork.
- Cleared site of any waste created.