Mitsubishi Electric MXZ-SM72TAM-U1 Service Manual page 115

Photo 11
Linear expansion
valve coil (LEV-B)
Low pressure
sensor (63LS)
High pressure
switch (63H)
High pressure
sensor (63HS)
10. Removing the high pressure switch (63H), high pressure sensor (63HS), and low pres-
sure sensor (63LS)
1. Remove the service panel. (See Photo 1)
2. Remove the top panel. (See Photo 1)
3. Remove the cover panel front. (See Photo 1)
4. Remove the cover panel rear. (See Photo 1)
5. Remove the side panel R. (See Photo 1)
6. Pull out the lead wire of high pressure switch or disconnect the connector 63HS (white) and connector 63LS (blue)
from the multi controller circuit board in the electrical parts box.
7. Remove the electrical parts box. (See Photo 5)
8. Recover refrigerant.
9. Remove the welded part of high pressure switch, high pressure sensor and low pressure sensor.
Notes:
• Recover refrigerant without spreading it in the air.
• When installing the high pressure switch, high pressure sensor and low pressure sensor, cover it with a wet cloth to
prevent it from heating (212°F [100°C] or more), then braze the pipes so that the inside of pipes are not oxidized.
• Be careful not to expose the fusible plug to the braze torch flame or transfer heat to it. The temperature of the fusible
plug must not become 140°F (60°C) or more while working. Protect the fusible plug with a wet cloth when neces-
sary. (The fusible plug breaks at 158°F [70°C]).
11. Removing linear expansion valve (LEV-A, LEV-B)
1. Remove the service panel. (See Photo 1)
2. Remove the top panel. (See Photo 1)
3. Remove the cover panel front. (See Photo 1)
4. Remove the cover panel rear. (See Photo 1)
5. Remove the side panel R. (See Photo 1)
6. Remove the electrical parts box. (See Photo 5)
7. Remove the linear expansion valve coil.
8. Recover refrigerant.
9. Remove the welded part of linear expansion valve.
12. Removing the reactor (DCL)
1. Remove the service panel. (See Photo 1)
2. Remove the top panel. (See Photo 1)
3. Remove the cover panel front. (See Photo 1)
4. Remove the cover panel rear. (See Photo 1)
5. Remove the side panel R. (See Photo 1)
6. Remove the electrical parts box. (See Photo 5)
7. Disconnect the lead wires from the reactor. (See Photo 12)
8. Disconnect the terminals of reactor on the bottom plate of the electrical parts box. (See Photo 12)
9. Remove screws of the reactor (DCL) on the bottom plate of the electrical parts box. (See Photo 12)
10. Remove the reactor.
OCH800A_115
Linear expansion valve
Linear expansion valve
Linear expansion
valve coil (LEV-A)
Bypass valve
coil fixing screw
Bypass valve
coil (SV1)
Bypass
valve