Removing The High Pressure Switch; Removing The Pressure Sensor; Removing The Compressor (Mc) - Mitsubishi Electric PUZ-WM50VHA Service Manual

OPERATING PROCEDURE
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 cover panel. (See Photo 1)
(4) Remove the stay and the side panel (R). (Refer to
Procedure 9)
(5) Remove the electrical parts box (Refer to Procedure 3).
(6) Pull out the lead wire of high pressure switch.
(7) Recover refrigerant.
(8) Remove the welded part of high pressure switch.
Note1: Recover refrigerant without letting it out in the air.
Note2: Access to the welded part becomes easier by
removing the right side panel.
Note3: When installing the high pressure switch, make
sure to cover it with a wet cloth to prevent it from
heating (100°C or more), then braze the pipes so
that the inside of pipes are not oxidized.
12. Removing the pressure sensor (63HS)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the stay and the side panel (R). (Refer to
Procedure 9)
(4) Pull out the lead wire of pressure sensor.
(5) Remove the electrical parts box (Refer to Procedure 3).
(6) Recover refrigerant.
(7) Remove the welded part of pressure sensor.
Note1: Recover refrigerant without letting it out in the air.
Note2: Access to the welded part becomes easier by
removing the right side panel.
Note3: When installing the pressure sensor, make sure to
cover it with a wet cloth to prevent it from heating
(100°C or more), then braze the pipes so that the
inside of pipes are not oxidized.

13. Removing the compressor (MC)

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the cover panel. (See photo 1)
(4) Remove the stay and the side panel (R). (Refer to Procedure 9)
(5) Remove the electrical parts box. (Refer to Procedure 3)
(6) Remove the soundproof cover and lid.
(7) Remove the Comp. surface thermistor (TH33) (Photo 7)
(8) Remove the terminal cover and remove the lead wire for
compressor.
(9) Recover refrigerant.
(10) Remove the 3 points of the compressor fixing nut using a
spanner or a adjustable wrench.
(11) Remove the welded pipe of the compressor, then remove
the compressor.
Note1 : Recover refrigerant without letting it out in the air.
Note2 : When replacing the soundproof lid, fit the lid to
the wrapped cover without making a gap.
OCH727
PHOTOS/FIGURES
Photo 11
High pressure
switch (63H)
Photo 12
Photo 13
Lead wire of
comp. surface
thermistor
(TH33)
Lead wire for
compressor
Compressor
(MC)
Compressor
fixing nuts
69
Pressure sensor (63HS)
Terminal cover