Removing The 4-Way Valve Coil (21S4), And Lev Coil (Lev(A)); Removing Lev - Mitsubishi Electric PUHZ-P100VHA2 Service Manual

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 (M5 × 6).
(4) Remove the 4-way valve coil by sliding the coil toward you.
(5) Disconnect the connector 21S4 (green) on the controller
circuit board in the control box.
(6) Loosen the clamp on the separator and unbind the lead
wires.
[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 control box.
(5) Loosen the clamp on the control box and unbind the lead
wires.
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 × 10) and 4 ball
valve and stop valve fixing screws (5 × 16) and then
remove the valve bed.
(4) Remove 9 side panel (R) fixing screws (5 × 12) in the rear
of the unit and then remove the side panel (R).
(5) Remove the 4-way valve coil. (Refer to procedure 7)
(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
removing 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 the valve bed. (Refer to procedure 8)
(4) Remove the side panel (R). (Refer to procedure 8)
(5) Remove the LEV coil. (Refer to procedure 7)
(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
removing 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.
OCH415G
Photo 8
Lead wire of high
pressure switch
High pressure switch
Bypass valve
coil (SV)
Bypass
valve coil
fixing screw
136
PHOTOS
LEV coil (LEV A)
LEV
Thermistor
<Outdoor pipe>
(TH3)
4-way valve
4-way valve coil
(21S4)
4-way valve coil
fixing screw