Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 87

8. Compressor
(16) After evacuating all nitrogen gas from the tubing, apply vacuum to outdoor unit where dry cores were removed
until the pressure is –101kPa {–755 mm Hg, 5 Torr} or less.
(17) Refer to the Installation Instructions for further information. 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) See the section "3-2-3. Refrigerant recovery procedures (2) : Indoor unit with no ball valve equipped". Perform
pump down of the refrigerant from all indoor units and inter-unit tubing to the outdoor unit side.
(2) Cut the liquid tube at all outdoor units where dry cores will be attached, then attach the dry cores and ball
valves as shown in Fig. 11.
(3) For the next steps, see the steps (6) – (17) in
(A)
Cleaning dry core
Dry core (bidirectional:
for R410A refrigerant)
Ball valve
Outdoor Unit Repair Procedures
on the previous page.
Liquid tube service port
(for ø7.94mm-dia connector)
Gas tube service port
(for ø7.94mm-dia connector)
Gas tube
Indoor unit
Liquid tube
Indoor unit
Fig. 11
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Mini VRF SYSTEM
3