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OPERATING PROCEDURE
7. Removing the 4-way valve coil (21S4), and linear expan-
sion valve coil (LEV-A, LEV-B)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
[Removing the 4-way valve coil] (See Photo 9)
(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.
(6) Loosen the fastener, cable strap and wire clamp for the
lead wire on the electrical parts box and separator.
[Removing the LEV coil] (See Photo 10)
(3) Loosen the lead wires fixed to the pipes with bands.
(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 circuit board in the electrical parts box.
(6) Loosen the wire clip for the lead wire on the electrical
parts box.
8. 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 the cover panel (front).(See Photo 1)
(5) Remove the stay.
(6) Remove the water pipes connected to water outlet and
water inlet.
(7) Remove 5 side panel (R) fixing screws (5 × 12) (4: rear of
the unit/1: right side base) and remove the side panel (R).
(8) Recover refrigerant.
(9) Remove the welded part of 4-way valve.
Refer to the notes below.
9. Removing LEV
(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 the cover panel (front). (See Photo 1)
(5) Remove the stay.
(6) Remove the water pipes connected to water outlet and
water inlet.
(7) Remove the side panel (R).
(8) Remove the LEV coil.
(9) Recover refrigerant.
(10) Remove the welded part of LEV.
Refer to the notes below.
10. Removing the high pressure switch (63H) (See Photo 9)
and the low pressure switch (63L)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box.
(4) Remove the cover panel (front). (See Photo 1)
(5) Remove the stay.
(6) Remove the water pipes connected to water outlet and
water inlet.
(7) Remove the side panel (R).
(8) Recover refrigerant.
(9) Remove the welded part of high pressure switch and low
pressure switch.
Refer to the notes on the right.•
OCH562D
PHOTOS/FIGURES
Photo 9
High pressure switch (63H)
4-way valve coil fi xing screw
Photo 10
LEV (LEV-A)
LEV (LEV-A)
4-way valve
LEV (LEV-B)
Heat exchanger
Photo 11
High pressure sensor (63HS)
Notes:
1. Recover refrigerant without spreading it in the air.
2. The welded part can be removed easily by removing the side panel (R).
3. When installing the following parts, cover it with a wet
cloth to prevent it from heating, then braze the pipes so
that the inside of pipes are not oxidized;
• 4-way valve (procedure 8), 120°C or more
• LEV (procedure 9), 120°C or more
• High pressure switch and low pressure switch
(procedure 10), 100°C or more
54
4-way valve
4-way valve
<R2/R3 model only>
LEV (LEV-A)
4-way valve
LEV (LEV-B)
LEV (LEV-B)
Low pressure switch (63L)
Low pressure switch (63L)
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