Mitsubishi Electric Mr.SLIM PUHZ-RP35VHA2 Service Manual page 139

OPERATING PROCEDURE
7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A),
LEV(B)) and bypass valve coil (SV)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 4)
[Removing the 4-way valve coil]
(4) Remove 4-way valve coil fixing screw (M4 × 6).
(5) Remove the 4-way valve coil by sliding the coil toward you.
(6) Disconnect the connector 21S4 (green) on the controller
board in the electrical parts box.
[Removing the LEV coil]
(4) Remove the LEV coil by sliding the coil upward.
(5) Disconnect the connectors, LEV A (white) and LEV B (red),
on the controller circuit board in the electrical parts box.
[Removing the bypass valve coil]
(4) Remove the bypass valve coil fixing screw (M4 × 6).
(5) Remove the bypass valve coil by sliding the coil upward.
(6) Disconnect the connector SV2 (blue) on the controller cir-
cuit 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 the electrical parts box. (See Photo 3)
(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(5) Remove 3 right side panel fixing screws (5 × 10) in the rear
of the unit and then remove the right side panel.
(6) Remove the 4-way valve coil. (See Photo 7)
(7) Recover refrigerant.
(8) Remove the welded part of four-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 the LEV
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(5) Remove 3 right side panel fixing screws (5 × 10) in the rear
of the unit and then remove the right side panel.
(6) Remove the LEV.
(7) Recover refrigerant.
(8) Remove the welded part of linear expansion 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 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 are not
oxidized.
Photo 7 (PUHZ-RP60/71VHA2
LEV coil (LEV B)
Bypass valve
coil fixing
screw
Bypass valve
coil (SV)
Photo 8 (PUHZ-RP60/71VHA2
Bypass
valve
coil (SV)
Bypass
valve
LEV
Charge
plug
(High
pressure)
Figure 2 (PUHZ-RP60/71VHA3(#1))
Bypass valve coil
fixing screw
Bypass valve
coil (SV)
Bypass valve
4-way valve
coil (21S4)
High pressure
switch(63H)
LEV coil
(LEV B)
Thermistor
<Discharge>
(TH4)
139
PHOTOS
)
(1)
LEV coil (LEV A)
)
(1)
LEV coil (LEV A)
LEV coil (LEV B)
Stop valve
4-way valve coil (21S4)
LEV coil
LEV
(LEV A)
4-way valve
4-way valve
fixing screw
4-way valve
coil (21S4)
LEV
4-way
valve
Charge
plug
(Low
pressure)
Thermistor
<Outdoor pipe>
(TH33)
Thermistor
<Outdoor pipe>
(TH3)
4-way
valve