Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual page 141

OPERATING PROCEDURE
10. 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 × 7).
(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.
11. 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 (Refer to procedure 3)
(4) Remove 3 valve bed fixing screws (5 × 12) and 4 stop
valve fixing screws (5 × 16) and then remove the valve
bed. (See Photo 4)
(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 15)
(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
removing 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.
OCH668B
PHOTOS/FIGURES
Photo 15
4-way valve coil (21S4)
4-way valve coil
fixing screw
141
4-way valve