Installation and Maintenance Manual

48 VRF-SVN33A-EN
Service: Pump Down Process
Pump Down Process
1. Follow the procedure for “Collecting Refrigerant into a Refrigerant Container” p. 47”.
2. Press the K2 button on the outdoor unit control board three times to initiate the pump down
process (Table 23, p. 41.)
3. Using a manifold gauge, observe the pressure drop when the compressor starts operating.
4. When the pressure reaches lower than 0 psig (0 MPa), turn off the gas side service valve.
5. Press the K3 button once.
6. Remove manifold gauge.
NOTICE
Equipment Damage!
Do not allow the amount of system refrigerant that is pulled into the outdoor unit during the
pump down process to exceed the capacity of the outdoor unit or equipment damage may
occur.