Mitsubishi Electric PU2-M100VKA Service Manual page 108

OPERATING PROCEDURE
11. Removing the 4-way valve coil (21S4)
(1) Remove the service panel. (See Photo 1)
[Removing the 4-way valve coil]
(2) Remove 4-way valve coil fixing screw (M5 × 6.5).
(3) Remove the 4-way valve coil by sliding the coil toward you.
(4) Disconnect the connector 21S4 (green) on the outdoor
multi controller circuit board in the electrical parts box.
12. Removing the 4-way valve
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box (See Photo 4)
(4) Remove 3 valve bed fixing screws (5 × 12) and 8 stop
valve fixing screws (5 × 16) and then remove the valve
bed. (See Photo 18)
(5) Remove 4 right side panel fixing screw (5 × 12) in the rear
of the unit and then remove the right side panel.
(6) Remove the 4-way valve coil. (See Photo 19)
(7) Recover refrigerant.
(8) Remove the welded part of 4-way valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the right side panel.
Note 3: When installing the 4-way valve, cover it with
a wet cloth to prevent it from heating (120°C or
more), then braze the pipes so that the inside of
pipes are not oxidized.
13. Removing the compressor (MC)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 cover panel (front) fixing screws (5 × 12) and
remove the cover panel (front). (See Photo 1)
(4) Remove 3 valve bed fixing screws (5 × 12) and 4 stop valve
fixing screws (5 × 16, 2 for gas and 2 for liquid) and then
remove the valve bed.
(5) Remove the nut from the terminal cover. (See Photo 17)
(6) Remove the terminal cover to disconnect the compressor
lead wire.
(7) Recover refrigerant.
(8) Remove the 3 points of the compressor fixing nut using a
spanner or an adjustable wrench.
(9) Remove the welded pipe of compressor inlet and outlet
and then remove the compressor.
Note: Recover refrigerant without spreading it in the air.
OCH707C
PHOTOS/FIGURES
Photo 20
Terminal
cover
Compressor
lead wire
Compressor
108
Compressor
(MC)
fixing nuts