Removing The Bypass Valve; Removing The High Pressure Switch (63H); Removing The Reactor (Acl) (A24) - Mitsubishi Electric PUZ-A18NHA4 Service Manual

OPERATING PROCEDURE

11. Removing the bypass 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 right side panel fixing screws (5 × 12) in the
rear of the unit and remove the right side panel.
(5) Remove the bypass valve coil. (See Photo 8).
(6) Recover refrigerant.
(7) Remove the welded part of bypass valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.

12. Removing the high pressure switch (63H)

(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 right side panel fixing screws (5 × 12) in the
rear of the unit and remove the right side panel.
(5) Pull out the lead wire of high pressure switch.
(6) Recover refrigerant.
(7) Remove the welded part of high pressure switch.
Note 1: Recover 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 high pressure switch, cover it
with a wet cloth to prevent it from heating (210˚F
or more), then braze the pipes so that the inside
of pipes are not oxidized.

13. Removing the reactor (ACL) (A24)

(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 reactor fixing screws (4 × 16) and remove the
reactor.
w The reactor is attached to the rear of the electrical parts box.
Photo 10
Bypass valve
fixing screw
Photo 11
4-way valve
Photo 12
Reactor fixing screw
Reactor fixing screws
114
PHOTOS
Bypass valve
Bypass valve coil
High pressure
Linear expansion
switch (63H)
valve coil (LEV-A)
Reactor
(ACL)
Electrical parts box