Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual page 142

OPERATING PROCEDURE
12. Removing the solenoid valve coil (SV1) and the solenoid valve
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the connector SV1 (Gray) on the multi
controller circuit board in the electrical parts box.
(4) Remove the electrical parts box. (Refer to procedure 3)
(5) Remove the solenoid valve coil fixing screw (M4 ×6).
(6) Remove the solenoid valve coil by sliding the coil
upward.
(7) Recover refrigerant.
(8) Remove the welded part of solenoid valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: When installing the solenoid valve, cover it
with a wet cloth to prevent it from heating
(120°C or more), then braze the pipes so that
the inside of pipes are not oxidized.
13. Removing the high pressure switch (63H)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (Refer to procedure 3)
(4) Remove the side panel (R). (Refer to the procedure 7 (3))
(5) Pull out the 2 lead wire of the high pressure switch.
(6) Recover refrigerant.
(7) Remove the welded part of high 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
high pressure sensor, cover them with a wet
cloth to prevent them from heating (100°C or
more), then braze the pipes so that the inside
of pipes are not oxidized.
14. Removing the low pressure sensor (63LS) and the
high pressure sensor (63HS)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the side panel (R). (Refer to the procedure 7 (3))
(4) Disconnect the connector 63LS (blue) and the
63HS(white) on the multi controller circuit board in the
electrical parts box.
(5) Loosen the clamps, which are fixing the low pressure sensor
and high pressure sensor lead wire to the top of the electrical
parts box. (See Photo 17)
(6) Recover refrigerant.
(7) Remove the welded part of low pressure sensor and
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 low pressure sensor and
high pressure sensor, cover it with a wet cloth
to prevent it from heating (100°C or more),
then braze the pipes so that the inside of
pipes are not oxidized.
OCH668B
PHOTOS/FIGURES
Photo 16
High pressure
switch
Solenoid coil
Photo 17
Electrical parts box
142
High pressure
sensor
Low pressure
sensor
Clamps