OPERATING PROCEDURE
PHOTOS/FIGURES
8.
Removing the 4-way valve coil (21S4), and LEV coil (LEV-A, LEV-B, LEV-C)
(1)
Remove the service panel. (Refer to procedure 1)
[Removing the 4-way valve coil] (See Photo 17)
(2)
Disconnect the green connector for 21S4 on the control-
ler circuit board in the electrical parts box.
(3)
Release the lead wire from the cable strap of the electri-
cal parts box.
(4)
Loosen the wire clamps of the separator to disconnect
the lead wire.
(5)
Remove the 4-way valve coil by sliding the coil towards you.
(6)
Remove the 4-way valve coil fixing screw (M4 × 6).
[Removing the LEV coil] (See Photo 18)
(2)
Remove the LEV coil by sliding the coil upward.
(3)
Loosen the clamp for lead wire on the electrical parts box.
(4)
Disconnect the connectors, LEV-A (white), LEV-B (red) and LEV-C
(blue) on the controller circuit board in the electrical parts box.
Photo 17
9. Removing the 4-way valve
(1)
Remove the electrical parts box. (Refer to procedure 4)
(2)
Remove 3 valve bed fixing screws (4 × 10), 2 valve and
fixing screws (5 × 16) then remove the valve bed.
(3)
Remove cover panel (front) fixing screws (2 for front/5 ×
12) to remove the cover panel (front).
(4)
Remove the water pipe.
(5)
Remove 5 right side panel (R) fixing screws (5 × 12) (4: rear of
the unit/1: right side base) and remove the side panel (R).
(6)
Recover refrigerant.
(7)
Remove the welded part of 4-way valve.
Photo 18
Photo 19
10. Removing the LEV
(1)
Remove the electrical parts box. (Refer to procedure 4)
(2)
Remove 3 valve bed fixing screws (4 × 10), 2 valve and
fixing screws (5 × 16) then remove the valve bed.
(3)
Remove cover panel (front) fixing screws (2 for front/5 ×
12) to remove the cover panel (front).
(4)
Remove the water pipe.
(5)
Remove 5 right side panel (R) fixing screws (5 × 12) (4: rear of
the unit/1: right side base) and remove the side panel (R).
(6)
Remove the LEV coil.
(7)
Recover refrigerant.
(8)
Remove the welded part of LEV.
11. Removing the pressure switch (63H) (See Photo 17) and
the low pressure switch (63L)
(1)
Remove the electrical parts box. (Refer to procedure 4)
(2)
Remove 3 valve bed fixing screws (4 × 10), 2 valve and
fixing screws (5 × 16) then remove the valve bed.
(3)
Remove cover panel (front) fixing screws (2 for front/5 ×
12) to remove the cover panel (front).
(4)
Remove 5 right side panel (R) fixing screws (5 × 12) (4:rear of the
unit/1: right side base) and remove the side panel (R).
(5)
Recover refrigerant.
(6)
Remove the welded part of high pressure switch and low pressure switch.
12. Removing high pressure sensor (63HS) (See Photo 19)
(1)
Remove the electrical parts box. (Refer to procedure 4)
(2)
Remove 3 valve bed fixing screws (4 × 10), 2 valve and
fixing screws (5 × 16) then remove the valve bed.
(3)
Remove cover panel (front) fixing screws (2 for front/5 ×
12) to remove the cover panel (front).
(4)
Remove the water pipe.
(5)
Remove 5 right side panel (R) fixing screws (5 × 12) (4: rear
of the unit/1: right side base) and remove the side panel (R).
(6)
Recover refrigerant.
(7)
Remove the welded part of high pressure sensor.
LEV (LEV-C)
LEV (LEV-A)
LEV (LEV-B) 4-way valve Heat exchanger
Pressure switch (63H)
4-way valve coil fixing screw
4-way valve
Note1: When removing the parts for refrigerant circuit, take out the refrigerant soon after removing the service panel.
Note2: Recover refrigerant without spreading it in the air.
Note3: When installing the 4-way valve, the LEV, the pressure switch (63H) and the high pressure switch (63HS), cover it with a wet
cloth to prevent it from heating (120°C or more for the 4-way valve and the LEV/ 100°C or more for 63H and 63HS), then braze
the pipes so that the inside of pipes are not oxidized.
Note4: A rubber cap is attached to the sealing part of refrigerant. The rubber cap needs to be detached when recovering refrigerant.
Do not lose the rubber cap and attach the rubber cap again after charging refrigerant.
High pressure sensor (63HS)
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