Mitsubishi Electric PUZ-A18NHA6 Service Manual page 121

OPERATING PROCEDURE
8. Removing the 4-way valve coil (21S4), linear expansion
valve coil (LEV-A) and bypass valve coil (SV)
[Removing the 4-way valve coil]
[Removing the linear expansion valve coil]
[Removing the bypass valve coil]
9. Removing the 4-way valve
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the 4-way valve, cover it with a wet
braze the pipes so that the inside of pipes are not
oxidized.
10. Removing the linear expansion valve
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the linear expansion valve, cover
or more), then braze the pipes so that the inside
of pipes are not oxidized.
PHOTOS
Photo 8
Photo 9