Mitsubishi Electric MXZ-8B48NA Technical & Service Manual page 84

OPERATING PROCEDURE
11. Removing the high pressure switch (63H) and
low pressure switch (63L)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 right side panel fixing screws (5 o 12) in the
rear of the unit and remove the right side panel.
(5) Pull out the lead wire of high pressure switch and low
pressure switch.
(6) Recover refrigerant.
(7) 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 right side panel.
Note 3: When installing the high pressure switch and low
pressure switch, cover them with a wet cloth to prevent
them from heating (100°C [210°F] or more), then braze
the pipes so that the inside of pipes are not oxidized.
12. Removing the high pressure sensor (63HS)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 right side panel fixing screws (5 o 12) in the
rear of the unit and remove the right side panel.
(5) Pull out the lead wire of high pressure sensor.
(6) Recover refrigerant.
(7) Remove the welded part of high pressure sensor.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by removing
the right side panel.
Note 3: When installing the high pressure sensor, cover it with
a wet cloth to prevent it from heating (100°C [210°F]
or more), then braze the pipes so that the inside of
pipes are not oxidized.
PHOTOS
Photo 9
High pressure switch (63H)
High pressure
sensor (63HS)
84
Low pressure switch (63L)