Panasonic U-10MF1E8 Service Manual page 66

9. Pumping Out Refrigerant from Outdoor Unit
(10) When the low pressure at the outdoor unit to be repaired reaches 0.5 MPa or below, pull out the SCT
connector (2P) (YEL) (CN231) from the outdoor unit control PCB of that outdoor unit. Then immediately fully
close the discharge tube valve on that outdoor unit.
* Pulling out the SCT connector immediately stops all of the outdoor units.
CAUTION
(11) 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.
(12) 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.
2
NOTE
To determine the completion of refrigerant recovery, follow the instructions that came with the
refrigerant recovery unit.
Manifold gauge
Lo Hi
Connect from here to
refrigerant recovery 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 discharge tube valve on the outdoor unit to be repaired.
Faulty outdoor unit
High-pressure outlet port Low-pressure outlet port
(For 7.94mm-dia. connector) (For 7.94mm-dia. connector)
Outdoor Unit Repair Procedures
Other outdoor unit
Liquid tube service port
(For 7.94mm-dia. connector)
Fig. 18
2 - 22
3-WAY SYSTEM
Refrigerant
recovery
cylinder
Measuring scale