Mitsubishi Electric PUHZ-SHW112VAA, Руководство по обслуживанию

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OPERATING PROCEDURE PHOTOS
11. Removing the 4-way valve, LEV (LEV-A, LEV-B, LEV-C
(*1)
),
high pressure switch, low pressure switch and high pres-
sure sensor.
(1) Remove the service panel. (See Photo 1)
(2) Recover refrigerant.
(3) Remove the electrical parts box. (See Photo 3-1)
(4) Remove the valve bed fixing screws (3 for front/ 5 × 12)
and the ball valve and stop valve fixing screws (4 for
fornt/ 5 x 16) to remove the valve bed.
(5) Remove the side panel (R). (See Photo 1)
[Removing the 4-way valve]
(6) Remove the 4-way valve coil.
(7) Remove the welded part of 4-way valve (4 positions) to
remove the 4-way valve.
[Removing the LEV]
(6) Remove the LEV coil.
(7) Loosen the LEV fixed to the pipe with band and rubber
mount.
(8) Remove the welded part of LEV (2 positions) to remove the LEV.
[Removing the pressure switch]
(6) Disconnect the lead wire from the pressure switch.
(7) Loosen the pressure switch fixed to the pipe with band
and rubber mount.
(8) Remove the welded part of pressure switch (1 position)
to remove the pressure switch.
[Removing the high pressure sensor]
(6) Disconnect the lead wire from the high pressure sensor.
(7) Loosen the high pressure sensor fixed to the pipe with
band and rubber mount.
(8) Remove the welded part of high pressure sensor (1 posi-
tion) to remove the high pressure sensor.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: 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
• Low pressure switch, 100°C or more
• High pressure sensor, 100°C or more
*
1
For SHW·model only
Photo 11 (SHW model)
Photo 12
12. Removing the compressor (MC)
(1) Remove the service panel. (See Photo 1)
(2) Recover refrigerant.
(3) Remove the electrical parts box. (See Photo 3-1)
(4) Remove the valve bed. (See Photo 3-1)
(5) Remove the side panel (R). (See Photo 1)
(6) Remove the thermistor <Liquid> (TH3), thermistor
<2-Phase Pipe> (TH6), thermistor <Ambient> (TH7), ther-
mistor <Discharge> (TH4), thermistor <Suction> (TH32)
(
*
1)
and thermistor <Comp. Surface> (TH33).
(7) Remove the 4-way valve coil and LEV coil.
(8) Disconnect the lead wire from the pressure switch and
sensor.
(9) Remove the comp case (side) fixing screws (1 for front
and 1 for right/ 4 × 10) to remove the comp case (side).
(10) Remove the hic top support fixing screw (1 for front/ 4 ×
10) to remove the hic top support.*
1
(11) Remove the welded part (Joint part of the compressor,
heat exchanger and receiver) of piping (SW100 · model for
6 positions, SHW · model for 7 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: Recover refrigerant without spreading it in the air.
2: Tighten the nuts of compressor with a torque of
4 ± 0.4 N·m.
*
1
For SHW·model only
LEV
4-way valve coil
fixing screw
Valve bed Low pressure switch
High
pressure
switch
High
pressure
sensor
LEV coil
(LEV-B)
LEV coil
(LEV-A)
LEV coil
(LEV-C)
Compressor
Comp case (side)
Hic top support *
1
4-way valve
4-way valve
coil
OCH651