Removing The Solenoid Valve Coil; Removing The Four-Way Valve; Removing The Linear Expansion Valve - Mitsubishi Electric Mr.SLIM PU-P71VHA Service Manual

OPERATING PROCEDURE
6. Removing the solenoid valve coil <Four-way valve> (21S4),
linear expansion valve coil (LEV)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
[Removing the solenoid valve coil <Four-way valve>]
(4) Remove solenoid valve coil <Four-way valve> fixing screw
(M4 × 6).
(5) Remove the solenoid valve coil <Four-way valve> by
sliding the coil toward you.
(6) Disconnect the connector 21S4 (green) on the controller
board in the electrical parts box.
[Removing the linear expansion valve coil] (See Photo 7)
(4) Remove the linear expansion valve coil by sliding the coil
upward.
(5) Disconnect the connector CNLEV (white) on the controller
circuit board in the electrical parts box.

7. Removing the four-way valve

(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(5) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(6) Remove the solenoid valve coil <Four-way valve>.
(See Photo 6)
(7) Collect the refrigerant.
(8) Remove the welded part of four-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 four-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.

8. Removing the linear expansion valve

(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(5) Remove 3 right side panel fixing screw (5 × 10) in the rear
of the unit and then remove the right side panel.
(6) Remove the linear expansion valve coil.
(7) Collect the refrigerant.
(8) Remove the welded part of 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
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.
OC379F
Photo 6
Solenoid valve coil
<Four-way valve> fixing screw
Photo 7
Linear expansion
valve coil (LEV)
75
PHOTOS
Four-way valve
Thermistor (TH6)
Thermistor
(TH3)