OPERATING PROCEDURE
79
PHOTOS
6.
Removing the solenoid valve coil <Four-way valve> (21S4),
linear expansion valve coil (LEV) and solenoid valve coil
<Bypass valve> (SV)
(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]
(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.
[Removing the solenoid valve coil <Bypass valve>]
(4)
Remove the solenoid valve coil <Bypass valve> fixing
screw (M5 × 6).
(5)
Remove the solenoid valve coil <Bypass valve> by sliding
the coil upward.
(6)
Disconnect the connector SV (black) 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 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(4)
Remove 4 right side panel fixing screws (5 × 10) in the rear
of the unit and then remove the right side panel.
(5) Remove the solenoid valve coil <Four-way valve>.
(6) Collect the refrigerant.
(7) 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 linear expansion valve
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3)
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.
(4)
Remove 4 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(5) Remove the linear expansion valve.
(6) Collect the refrigerant.
(7) 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.
Photo 6
Solenoid valve coil
<Bypass valve>
(SV)
Solenoid valve coil
<Four-way valve>
fixing screw
Four-way valve
Solenoid valve coil
<Four-way valve>
(21S4)
OC379F
