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OPERATING PROCEDURE
PHOTOS
7. Removing the 4-way valve coil (21S4),
and linear expansion valve coil (LEV-A)
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
[Removing the 4-way valve coil]
(3) Remove 4-way valve coil fixing screw
(M4 ✕ 6).
(4) Remove the 4-way valve coil by sliding the coil toward you.
(5) Disconnect the connector 21S4 (green) on the controller
circuit board in the electrical parts box.
[Removing the linear expansion valve coil]
(3) Remove the linear expansion valve coil by sliding the coil
upward.
(4) Disconnect the connectors, LEV-A (white), on the
controller circuit board in the electrical parts box.
8. Removing the 4-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), 4 ball valve
and stop valve fixing screws (5 ✕ 16), then remove the
valve bed.
(4) Remove 4 right side panel fixing screw (5 ✕ 10) in the
rear of the unit and then remove the right side panel.
(5) Remove the 4-way valve coil. (See photo 7.)
(6) Recover refrigerant.
(7) 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 (250˚F or more),
then braze the pipes so that the inside of pipes
are not oxidized.
9. 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), 4 ball valve
and stop valve fixing screws (5 ✕ 16), then remove the
valve bed.
(4) Remove 4 right side panel fixing screw (5 ✕ 10) in the
rear of the unit and then remove the right side panel.
(5) Remove the linear expansion valve. (See photo 7.)
(6) Recover 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 remov-
ing the right side panel.
Note 3: When installing the linear expansion valve, cover
it with a wet cloth to prevent it from heating
(250˚F or more), then braze the pipes so that the
inside of pip-es are not oxidized.
Photo 7
4-way valve
Linear expansion
valve coil (LEV-A)
Linear expansion
valve
4-way way
valve coil
4-way valve
coil
fixing screw
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