Removing The High Pressure Switch (63H) And Low Pressure Switch (63L); Removing The Compressor (Mc) - Mitsubishi Electric PUHZ-SHW230YKA2 Service Manual

OPERATING PROCEDURE
10. Removing the high pressure switch (63H) and low pres-
sure switch (63L)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove the valve bed. (See Photo 9)
(5) Remove cover panel (front) fixing screws (2 for front/5 × 12)
to remove the cover panel (front).
(6) Remove right side panel fixing screws (3 for heat
exchanger/5 × 12) and 2 cover panel (rear) fixing screws
(5 × 12) in the side and rear of the unit (both of them are
fixed in the base) then remove the right side panel and
the cover panel together. (See Figure 4)
(7) Disconnect the lead wire of high pressure switch and low
pressure switch.
(8) Recover refrigerant.
(9) Remove the welded part of high pressure switch and low
pressure switch.
Note 1: Recover refrigerant without spreading it in the
air.
Note 2: The welded part can be removed easily by
removing the side panel (R).
Note 3: When installing the parts of refrigerant circuit,
cover it with a wet cloth to prevent it from heat-
ing (100°C or more), then braze the pipes so that
the inside of pipes are not oxidized.
< YKA2R2 type >

11. Removing the compressor (MC)

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 front cover panel fixing screws (5 × 12) and
remove the front cover panel.
(4) Remove 4 back cover panel fixing screws (5 × 12) and
remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 3)
(6) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve and
stop valve fixing screws (5 × 16), then remove the valve bed.
(7) Remove 3 right side panel fixing screws (5 × 12) in the
rear of the unit and remove the right side panel.
(8) Remove front panel fixing screws (2 for front/4 × 10, 5
for front/5 × 12) to remove the front panel.
(9) Remove the soundproof cover for compressor.
(10) Remove the terminal cover and remove the compressor lead wire.
(11) Recover refrigerant.
(12) Remove the welded pipe of compressor inlet, outlet and
injection pipe.
(13) Remove the 3 points of the compressor fixing nut using
a spanner or a adjustable wrench.
(14) Remove the compressor.
Note: Recover refrigerant without spreading it in the air.
OCH594B
Photo 7
High pressure switch
Figure 5
< YKA2/YKA2R1 type >
Thermistor
<Suction>
(TH32)
Low
pressure
switch (63L)
Photo 8
Compressor
terminal
Soundproof
cover
61
PHOTOS/FIGURES
Thermistor
<Suction>
(TH32)
Low
pressure
switch (63L)
Compressor
(MC)
Compressor
fixing nuts