Panasonic U-120ME2U9 Service Manual page 87

8. Pumping Out Refrigerant from Outdoor Unit
8. Pumping Out Refrigerant from Outdoor Unit
(6) Close the gas 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 gas tube valve on that outdoor unit.
* Pulling out the SCT connector immediately stops all of the outdoor units.
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.
CAUTION
If this occurs, immediately fully close the gas tube valve on the outdoor unit to be
repaired.
(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
enters the tubing 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.
To determine the completion of refrigerant recovery, follow the instructions that came with the
NOTE
refrigerant recovery unit.
Outdoor Unit Repair Procedures
Outdoor Unit Repair Procedures
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2WAY VRF SYSTEM
2WAY VRF SYSTEM
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