3WAY SYSTEM
Outdoor Unit Repair Procedures
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8. Pumping Out Refrigerant from Outdoor Unit
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 gas tube valve on the outdoor unit to be repaired.
CAUTION
NOTE
To determine the completion of refrigerant recovery, follow the instructions that came with the refrigerant recovery unit.
(9) Close the gas tube and balance tube on the outdoor unit to be repaired. Then slowly close the liquid tube ser-
vice valve.
* When the low pressure at the outdoor unit to be repaired reaches 0.5 MPa or below, pull out the SCT connec-
tor (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.
(10) 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.
(11) 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.
Fig. 14
High-pressure outlet port
(for ø7.94mm-dia connector)
Low-pressure outlet port
(for ø7.94mm-dia connector)
Manifold gauge
Lo
Hi
Connect to
refrigerant
recovery unit
Refrigerant
recovery
cylinder
Measuring scale
Liquid tube service port
(for ø7.94mm-dia connector)
Faulty outdoor unit
Other outdoor unit
5/A9#;'%1K5;56'/A5G
