Panasonic U-72MF2U9 Service Manual page 86

8. Pumping Out Refrigerant from Outdoor Unit
8. Pumping Out Refrigerant from Outdoor Unit
(6) Close the discharge tube and balance tube on the outdoor unit to be repaired. Then slowly close the liquid tube
service valve.
* When the low pressure at the outdoor unit to be repaired reaches 72.5 psi (0.5MPa) or below, pull out the SCT
connector (2P) (YEL) (CN65) from the outdoor unit control PCB of that outdoor unit. Then immediately fully close
the suction tube valve on that outdoor unit.
* Pulling out the SCT connector immediately stops all of the outdoor units.
CAUTION
(7) Connect the high-pressure gauge side of the manifold gauge to the high-pressure outlet port on the outdoor
unit to be repaired, and connect the manifold gauge to the refrigerant recovery device. Be sure that no air
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enters the tube at this time.
(8) Open both Hi- and Lo-side valves on the manifold gauge valves, and recover the refrigerant remaining in the
outdoor unit. After that, measure the amount of recovered refrigerant.
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NOTE
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While closing the valves, the rise in discharge temperature or another factor may
cause a protective device to activate, stopping the operation of the outdoor unit.
If this occurs, immediately fully close the suction tube valve on the outdoor unit to be
repaired.
To determine the completion of refrigerant recovery, follow the instructions that came with the
refrigerant recovery unit.
Outdoor Unit Repair Procedures
Outdoor Unit Repair Procedures
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2WAY VRF SYSTEM
3WAY VRF SYSTEM