Service manual

68
OPERATING PROCEDURE
PHOTOS
7. Removing the 4-way valve solenoid coil (21S4),
linear expansion valve coil (LEV(A), LEV(B)) and
bypass valve solenoid coil (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 4-way valve solenoid coil>
(4) Remove 4-way valve solenoid coil fixing screw (M4 ✕ 6).
(5) Remove the 4-way valve solenoid coil 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 connectors, LEV A (white) and LEV B (red),
on the controller board in the electrical parts box.
<Removing the bypass valve solenoid coil>
(4) Remove the bypass valve solenoid coil fixing screw
(M4 ✕ 6).
(5) Remove the bypass valve solenoid coil by sliding the
coil upward.
(6) Disconnect the connector SV2 (blue) on the controller
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 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 4-way valve solenoid coil. (See photo 7.)
(7) Collect the refrigerant.
(8) Remove the welded part of 4-way valve.
Note 1: Collect 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.
9. Removing 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. (See photo 7.)
(7) Collect the refrigerant.
(8) Remove the welded part of linear expansion valve.
Note 1: Collect 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 pip-
es are not oxidized.
Photo 7
Photo 8
4-way valve
solenoid coil
(21S4)
4-way valve
solenoid coil
fixing screw
4-way valve
Linear expansion
valve coil (LEV B)
Linear expansion
valve coil (LEV A)
Bypass valve
solenoid coil
fixing screw
Bypass valve
solenoid coil
(SV)
Linear expansion
valve coil (LEV B)
Linear expansion
valve coil (LEV A)
Linear
expansion
valve
Bypass
valve
Bypass
valve
solenoid
coil (SV)
4-way
valve
solenoid
coil
(21S4)
4-way
valve
Linear
expansion
valve
OC294--3.qxp 03.6.9 7:39 PM Page 68