Mitsubishi Electric PUHZ-HRP71VHA Service Manual page 131

OPERATING PROCEDURE
12. Removing bypass valve coil (SV) and bypass valve
(Only for PUHZ-HRP·V/YHA, PUHZ-HRP·V/YHA2)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 right side panel fixing screws (5 × 12) in the
rear of the unit and remove the right side panel.
(4) Remove the bypass valve solenoid coil fixing screw (M5
×6).
(5) Remove the bypass valve coil by sliding the coil upward.
(6) Disconnect the connector SV2 (blue) on the controller
circuit board in the electrical parts box.
(7) Recover refrigerant.
(8) Remove the welded part of bypass valve.
Note 1: Recover refrigerant without spreading it in the
air.
Note 2: The welded part can be removed easily by
removing the side panel (R).
13. Removing the high pressure sensor (63HS)
(Only for PUHZ-HRP100/125YHA2)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Pull out the lead wire of high pressure sensor.
(4) Recover refrigerant.
(5) 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 side panel (R).
Note 3: When installing the pressure sensor, make
sure to 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 oxi-
dized.
OCH425F
Photo 15
Replace filter
Bypass valve coil (SV)
Figure 3
High pressure
switch (63H)
4-way
valve coil (21S4)
4-way valve
High pressure
sensor (63HS)
131
PHOTOS
Thermistor
Bypass valve
<Ref. check>
coil fixing screw
(TH33)
Bypass valve
LEV coil (LEV-C)
LEV
LEV coil (LEV-A)
Thermistor
<Ref. check> (TH33)
Bypass valve coil (SV)
(except HRP·HA2R1)
Bypass valve
(except HRP·HA2R1)
LEV
LEV coil (LEV-B)
Low pressure
switch (63L)