Mitsubishi Electric PUMY-P250YBM2-ER Technical & Service Manual page 128

OPERATING PROCEDURE
9. Removing bypass valve coil (SV1 and SV3) and bypass
valve
(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 bypass valve coil fixing screw (M4 × 6).
(7) Remove the bypass valve coil by sliding the coil upward.
(8) Disconnect the connector SV1 (gray) and SV3 (black) on
the multi controller circuit board in the electrical parts box.
(See Photo 10 and 11)
(9) Remove the electrical parts box to remove SV1. (See Photo 5)
(10) Recover refrigerant.
(11) Remove the welded part of bypass valve.
Refer to the notes below.
10. Removing the high pressure switch (63H), high pressure
sensor (63HS), and low pressure 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 pres-
sure sensor and low pressure sensor.
Refer to the notes to the right.
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. (See Photo 11)
(8) Recover refrigerant.
(9) Remove the welded part of linear expansion valve.
12. Removing the reactor (DCL, DCL2)
(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 (DCL2) and screws
1
the reactor (DCL) on the bottom plate of the electrical parts
box. (See Photo 12)
(10) Remove the reactor.
TCH091
PHOTOS/FIGURES
Photo 11
Linear
expansion valve
Linear expan-
sion valve coil
(LEV-B)
High pressure
switch (63H)
High pressure
sensor (63HS)
Notes:
1. Recover refrigerant without spreading it in the air.
2. When installing the following parts, cover it with a
wet cloth to prevent it from heating as the tempera-
ture below, then braze the pipes so that the inside of
pipes are not oxidized;
• Bypass valve (procedure 9), 120°C or more
• High pressure switch and high pressure sensor
(procedure 10), 100°C or more
• Low pressure sensor (procedure 10), 100°C or more
Photo 12
Reactor (DCL) Electrical parts box
of
2
Bottom plate of
Screws 2
electrical parts box
128
Linear
expansion valve
Linear expan-
sion valve coil
(LEV-A)
Bypass valve
coil fixing screw
Bypass valve
coil (SV1)
Bypass
valve
Low pressure
sensor (63LS)
Terminals of
reactor
Screws 1
Reactor (DCL2)