Mitsubishi Electric PUZ-WM50VHA Service Manual page 77

OPERATING PROCEDURE
13. Removing the compressor (MC)
(1) Remove the nozzle of plate heat exchanger for the water
piping. (See Photo 14)
(2) Remove the service panel. (See Photo 1)
(3) Recover refrigerant.
(4) Remove the electrical parts box. (See Photo 3-1)
(5) Remove the side panel (R). (See Photo 1)
(6) Remove the thermistor <Plate Hex Liquid> (TH34),
thermistor <Discharge> (TH4) and thermistor <Comp.
Surface> (TH33). (See Photo 9 and 10)
(7) Remove the 4-way valve coil and LEV coil. (See Photo 11)
(8) Disconnect the lead wires from the pressure switch and
sensor. (See Photo 11)
(9) Loosen the rubber mount fixed to the receiver pipes with
a band. (See Photo 13)
(10) Remove the comp case (side) fixing screws (1 for front
and 1 for right/ 4 x 10) to remove the comp case (side).
(11) Remove the welded part (Joint part of the compressor,
heat exchanger, receiver and plate heat exchanger)
of piping (8 positions), then slide the piping upward to
remove it.
(12) Remove the compressor fixing nuts (3 for top/ M6) to
remove the compressor.
Note 1: Drain the water in the plate heat exchanger before
removing the water piping.
Note 2: Recover refrigerant without spreading it in the air.
Note 3: Tighten the nuts of compressor with a torque of
4 ± 0.4 N·m.
14. Removing the receiver
(1) Remove the nozzle of plate heat exchanger for the water
piping. (See Photo 14)
(2) Remove the service panel. (See Photo 1)
(3) Recover refrigerant.
(4) Remove the piping.
(5) Remove the receiver leg fixing screws (2 for top/ 4 × 10),
then slide the receiver upward to remove it.
(The receiver is fixed to the base with a hook on the bottom.)
Note 1: Drain the water in the plate heat exchanger before
removing the water piping.
Note 2: Recover refrigerant without spreading it in the air.
OCH727
PHOTOS/FIGURES
Photo 12
Compressor
Photo 13
Receiver pipes
77
Comp case (side)
Rubber mount
Receiver leg
fixing screws
Receiver