Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 109

OPERATING PROCEDURE
8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A),
LEV (B)), and lead wire for high pressure switch.
(1) Remove the electrical parts box. (See Photo 4 or 5)
(2) Loosen the clamp for the lead wire on separator.
[Removing the lead wire for high pressure switch]
(3) Disconnect the lead wire from the high pressure switch.
[Removing the 4-way valve coil]
(3) Remove the 4-way valve coil fixing screw (1 for front/
M5) to remove the 4-way valve coil.
(4) Slide the 4-way valve coil forward to remove it.
[Removing the LEV coil]
(3) Loosen the lead wires fixed to the pipes with bands.
(4) Slide the LEV coil upward to remove it.
9. Removing the 4-way valve, LEV (LEV (A), LEV (B)), and
high pressure switch.
(1) Remove the electrical parts box. (See Photo 4 or 5)
(2) Remove the cover panel (front) fixing screws (1 for front
and 1 for side/ 5 x 12), then slide the cover panel (front)
upward to remove it.
(The cover panel (front) is fixed to the cover panel (rear)
with hooks on the rear side.) (See Photo 1)
(3) Remove the cover panel (rear) fixing screw (2 for right
side and 2 for rear/ 5 x 12), the slide the cover panel (rear)
upward to remove it.
(The cover panel (rear) is fixed to the side plate with
hooks on the rear side.) (See Photo 1)
(4) Remove the valve bed fixing screws (3 for front/ 5 x 12)
and the ball valve and stop valve fixing screws (4 for
front/ 5 x 16) to remove the valve bed.
(5) Remove the side panel (R) fixing screws (3 for rear/ 5 x
12), then slide the side panel (R) upward to remove it.
(The side panel (R) is fixed to the side plate with hooks
on the rear side.)
(6) Recover refrigerant.
[Removing the 4-way valve]
(7) Remove the 4-way valve coil. (See Photo 16)
(8) Remove the welded part of 4-way valve (4 positions) to
remove the 4-way valve.
[Removing the LEV]
(7) Remove the LEV coil. (See Photo 16)
(8) Remove the welded part of LEV (2 positions) to remove
the LEV.
[Removing the high pressure switch]
(7) Disconnect the lead wire from the high pressure switch.
(8) Remove the welded part of high pressure switch (1 posi-
tion) to remove the high pressure switch.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the side panel (R).
Note 3: When installing the following parts, cover it with
a wet cloth to prevent it from heating as the tem-
perature below, then braze the pipes so that the
inside of pipes are not oxidized;
• 4-way valve, 120°C or more
• LEV, 120°C or more
• High pressure switch, 100°C or more
OCH771C
PHOTOS/FIGURES
Photo 16
High pressure
switch
4-way valve
coil (21S4)
Compressor
109
LEV A
LEV coil
(LEV A)
LEV B
LEV coil
(LEV B)
Power
receiver