Mitsubishi Electric PUHZ-W50VHA Service Manual page 107

OPERATING PROCEDURE
14. Removing the compressor (MC)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 screws (5 × 12) and remove the front cover panel.
(4) Remove 2 screws (5 × 12) and remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 4)
(6) Remove 3 screws (4 × 10) and remove the stay. (See Photo 10)
(7) Remove 3 screws (5 × 12) in the rear of the unit and
remove the right side panel.
(8) Remove 5 screws (1: 4 × 10, 4: 5 × 12) and remove the
front panel.
(9) Remove 3 screws (4 × 10) and remove the separator.
(10) Remove the terminal cover and remove the lead wire for
compressor.
(11) Remove the soundproof cover for compressor.
(12) Recover refrigerant.
(13) Remove the 3 points of the compressor fixing nut using a
spanner or a adjustable wrench.
(14) Remove the welded pipe of the compressor, then remove
the compressor.
Note 1: Recover refrigerant without spreading it in the air.
15. Removing the receiver
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 screws (5 × 12) and remove the front cover panel.
(4) Remove 2 screws (5 × 12) and remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 4)
(6) Remove 3 screws (4 × 10) and remove the stay. (See Photo 10)
(7) Remove 3 screws (5 × 12) in the rear of the unit and
remove the right side panel.
(8) Recover the refrigerant.
(9) Remove 2 welded pipes of receiver.
(10) Remove 2 receiver leg fixing screws (4 × 10), then
remove the receiver.
Note 1: Recover refrigerant without spreading it in the air.
16. Removing the plate heat exchanger
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 screws (5 × 12) and remove the front cover panel.
(4) Remove 2 screws (5 × 12) and remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 4)
(6) Remove 3 screws (4 × 10) and remove the stay. (See Photo 10)
(7) Remove 3 screws (5 × 12) in the rear of the unit and
remove the right side panel.
(8) Recover the refrigerant.
(9) Remove 2 welded pipes of plate heat exchanger inlet and outlet.
(10) Remove 2 plate heat exchanger fixing screws (4 × 10),
then remove the plate heat exchanger.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: Before removing the thermistor <Inlet water>
(TH32), recover water in the plate heat exchanger.
OCH439M
PHOTOS/FIGURES
Photo 12
Lead wire for
compressor
Compressor Compressor
(MC)
Photo 13
Compressor
fi xing nut
Photo 14
Thermistor
<Plate HEX liquid> <Plate HEX liquid>
(TH6)
Receiver
107
Terminal cover
Compressor Compressor
fi xing nut
Thermistor
<liquid>(TH3)
Plate heat
exchanger
Plate heat exchanger
fi xing screw
Receiver
leg fi xing
screw