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OPERATING PROCEDURE
8. Removing the solenoid valve coil <4-way valve> (21S4)
and linear expansion valve coil (LEV-A, LEV-B)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
[Removing the solenoid valve coil <4-way valve> ]
(4) Remove solenoid valve coil <4-way valve> fixing screw
(M4 x 6).
(5) Remove the solenoid valve coil <4-way valve>.
(6) Disconnect the connector 21S4 (GN) on the controller cir-
cuit board.
[Removing the linear expansion valve coil]
(4) Remove the linear expansion valve coil by sliding the coil
upward.
(5) Disconnect the connectors, LEV-A (WH) and LEV-B (RD),
on the controller circuit board.
9. 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. (See Photo 4)
(4) Remove 3 valve bed fixing screws (4
valve bed. (See Photo 4)
(5) Remove 3 side panel (R) fixing screws (5
of the unit and remove the side panel (R). (See Photo 4)
(6) Remove the solenoid valve coil <4-way valve>.
(7) Recover refrigerant.
(8) Remove the welded part of 4-way valve.
Refer to the notes below.
10. Removing linear expansion valve
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Remove 3 valve bed fixing screws (4
the valve bed. (See Photo 4)
(5) Remove 3 side panel (R) fixing screws (5
the unit and then remove the side panel (R). (See Photo 4)
(6) Remove the linear expansion valve.
(7) Recover refrigerant.
(8) Remove the welded part of linear expansion valve.
Refer to the notes below.
11. Removing the high pressure switch (63H)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Remove 3 side panel (R) fixing screws (5 × 12) in the rear
of the unit and remove the side panel (R). (See Photo 4)
(5) Pull out the lead wire of high pressure switch.
(6) Recover refrigerant.
(7) Remove the welded part of high pressure switch.
Refer to the notes on the right.
12. Removing the high pressure sensor (63HS)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Remove 3 side panel (R) fixing screws (5 × 12) in the rear
of the unit and remove the side panel (R). (See Photo 4)
(5) Pull out the lead wire of high pressure sensor.
(6) Recover refrigerant.
(7) Remove the welded part of high pressure sensor.
Refer to the notes on the right.
OCH605A
Photo 9
High pressure
switch
10) and remove the
×
Thermistor
12) in the rear
×
<Discharge> (TH4)
10) and remove
×
12) in the rear of
×
Note 1: Recover refrigerant without spreading it in the
Note 2: The welded part can be removed easily by
Note 3: When installing following parts, make sure
54
PHOTOS
High pressure
sensor
Solenoid valve
<4-way> (21S4)
Thermistor
<Comp. Surface> (TH34)
air.
removing the side panel (R).
to cover it with a wet cloth to prevent it from
heating as the temperature below, then braze
the pipes so that the inside of pipes are not
oxidized;
• 4-way valve (procedure 9), 120°C or more
• Linear expansion valve (procedure 10), 120°C or more
• High pressure switch (procedure 11), 100°C or more
• High pressure sensor (procedure 12), 100°C or more
4-way valve
Linear
Expansion
Valve
(LEV-A)
Linear
Expansion
Valve
(LEV-B)
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