Removing Bypass Valve Coil (Sv1) And Bypass Valve; Removing The High Pressure Switch (63H) And High Pressure Sensor (63Hs); Removing The Low Pressure Sensor (63Ls); Removing Electrical Expansion Valve (Lev-A, Lev-B) - Mitsubishi Electric PUMY-P200YKM Technical & Service Manual

OPERATING PROCEDURE

9. Removing bypass valve coil (SV1) and bypass valve

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 front cover panel fixing screws (5 × 12) and
remove the front cover panel. (See Photo 4)
(4) Remove 4 back cover panel fixing screws (5 × 12) and
remove the back cover panel.
(5) Remove 3 right side panel fixing screws (5 × 12) in the rear
of the unit and remove the right side panel.
(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) on the outdoor multi
controller circuit board in the electrical parts box.
(9) Remove the electrical parts box. (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) and high pres-
sure sensor (63HS)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 front cover panel fixing screws (5 × 12) and
remove the front cover panel. (See Photo 4)
(4) Remove 4 back cover panel fixing screws (5 × 12) and
remove the back cover panel.
(5) Remove 3 right side panel fixing screws (5 o 12) in the rear
of the unit and remove the right side panel.
(6) Pull out the lead wire of high pressure switch and high pres-
sure sensor.
(7) Remove the electrical parts box. (See Photo 5)
(8) Recover refrigerant.
(9) Remove the welded part of high pressure switch and high
pressure sensor.
Refer to the notes below.

11. Removing the low pressure sensor (63LS)

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 front cover panel fixing screws (5 × 12) and
remove the front cover panel. (See Photo 4)
(4) Remove 4 back cover panel fixing screws (5 × 12) and
remove the back cover panel.
(5) Remove 3 right side panel fixing screws (5 o 12) in the rear
of the unit and remove the right side panel.
(6) Disconnect the connector 63LS (blue) on the outdoor 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 low pressure sensor.
Refer to the notes below.

12. Removing electrical expansion valve (LEV-A, LEV-B)

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 2 front cover panel fixing screws (5 × 12) and
remove the front cover panel. (See Photo 4)
(4) Remove 4 back cover panel fixing screws (5 × 12) and
remove the back cover panel.
(5) Remove 3 right side panel fixing screws (5 o 12) in the rear
of the unit and remove the right side panel.
(6) Remove the electrical expansion valve coil. (See Photo 12)
(7) Remove the electrical parts box. (See Photo 5)
(8) Recover refrigerant.
(9) Remove the welded part of electrical expansion valve.
OCH575
Photo 11 & 12
Bypass valve Bypass valve
coil fixing screw coil (SV1)
High pressure
switch (63H)
High pressure
sensor (63HS)
Electronic expansion
valve coil (LEV-B)
Low pressure
sensor (63LS)
Notes:
1. Recover refrigerant without spreading it in the air.
2. The welded part can be removed easily by removing
the right side panel.
3. 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 11), 100°C or more
122
PHOTOS
Low pressure
sensor (63LS)
Bypass valve
Electronic
expansion valve
Electronic
expansion valve
Electronic expansion
valve coil (LEV-A)