Panasonic U-10MF1E8 Service Manual page 72

10. Compressor
(16) After evacuating all nitrogen gas from the tubing, apply vacuum to all outdoor units where dry cores were
removed until the pressure is –101kPa (5 Torr) or less.
(17) INSTALLATION: Refer to the "Information for the Person in Charge of Installation" items. Charge with an
amount of refrigerant equal to the amount that was recovered.
(B) If a ball valve is not installed on the outdoor unit
(1) Refer to "Refrigerant recovery procedures (2) for indoor unit with no ball valve" under "5-2. Refrigerant
Recovery Procedures (Indoor Unit)." Perform pump down of the refrigerant from all indoor units and inter-unit
tubing to the outdoor unit side.
(2) Cut the liquid (narrow) tube at all outdoor units where dry cores will be attached, then attach the dry cores
and ball valves as shown in Fig. 19.
(3) For the next steps, refer to (6) – (17) in (A) on the previous page.
2
Cleaning dry core
(Bidirectional type for R410A)
Outdoor unit
Dry core
Ball valve
Liquid tube service valve
Balance tube
Liquid tube
Discharge tube
Suction tube
Fig. 19
2 - 28
3-WAY SYSTEM
Outdoor Unit Repair Procedures
Normal unit