Mitsubishi Electric PUHZ-P100VHA2 Service Manual page 97

OPERATING PROCEDURE
7. Removing the 4-way valve coil (21S4), and LEV coil
(LEV(A))
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
[Removing the 4-way valve coil]
(3) Remove 4-way valve solenoid coil fixing screw
(M4 6).
(4) Remove the 4-way valve by sliding the coil toward you.
(5) Disconnect the connector 21S4 (green) on the controller
circuit board in the electrical parts box.
[Removing the LEV coil]
(3) Remove the LEV coil by sliding the coil upward.
(4) Disconnect the connectors, LEV A (white) on the controller
circuit board in the electrical parts box.
8. Removing the 4-way valve
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 3 valve bed fixing screws (4
valve and stop valve fixing screws (5
remove the valve bed.
(4) Remove 4 right side panel fixing screws (5
rear of the unit and then remove the right side panel.
(5) Remove the 4-way valve.
(6) Recover refrigerant.
(7) Remove the welded part of 4-way valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the right side panel.
Note 3: When installing the 4-way 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.
9. Removing LEV
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 3 valve bed fixing screws (4
valve and stop valve fixing screws (5
remove the valve bed.
(4) Remove 4 right side panel fixing screws (5
rear of the unit and then remove the right side panel.
(5) Remove the LEV.
(6) Recover refrigerant.
(7) Remove the welded part of LEV.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the right side panel.
Note 3: When installing the LEV, 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 is not
oxidized.
Photo 7
High pressure switch
10) and 4 ball
16) and then
10) in the
Bypass valve
coil (SV)
10) and 4 ball
16) and then
10) in the
97
PHOTOS
LEV
Lead wire of high
Thermistor
pressure switch
<Outdoor pipe>
(TH3)
4-way valve coil
(21S4)
Bypass
valve coil 4-way valve coil
fixing screw fixing screw
LEV coil (LEV A)
4-way valve