Mitsubishi Electric PUZ-ZM60VHA2, Service Manual

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7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A),
LEV(B))
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
[Removing the 4-way valve coil]
(4) Remove 4-way valve coil fixing screw (M5 × 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.
8. Removing the 4-way valve
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(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 × 12) in the rear
of the unit and then remove the right side panel.
(6) Remove the 4-way valve coil. (See Photo 8)
(7) Recover refrigerant.
(8) 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 the LEV
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(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 × 12) 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 8
4-way valve coil
fixing screw
4-way valve
High pressure
switch (63H)
Photo 9
LEV coil
(LEV A)
LEV coil
(LEV B)
4-way valve
4-way valve
coil (21S4)
High pressure
switch (63H)
Thermistor
<Discharge>
(TH4)
Thermistor
<Comp. surface>
(TH33)
Valve bed
fixing screws
Valve bed
fixing screw
4-way valve coil (21S4)
LEV B
LEV A
OPERATING PROCEDURE PHOTOS/FIGURES