Removing The 4-Way Valve Coil; Removing The 4-Way Valve - Mitsubishi Electric PUHZ-P100VHA2 Service Manual

OPERATING PROCEDURE
6. Removing the thermistor <Outdoor pipe>, <Liquid> (TH3),
thermistor <Discharge> (TH4) and thermistor <Comp.
surface> (TH32)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the connectors, TH3 (white) and TH4 (white),
TH32 (black) on the controller circuit board in the control box.
Loosen the fastener and the cable strap on the control box
and unbind the lead wires.
(4) Loosen the clamp for the lead wire in the top and rear of
the control box. (See Photo 5)
(5) Pull out the thermistor <Outdoor Pipe>,<Liquid> (TH3) and
thermistor <Discharge> (TH4) from the sensor holder.
[Removing the thermistor <Comp. Surface> (TH32)] for
VHA3R2, VHA4 and YHA
(6) Pull out the thermistor <Comp. Surface> (TH32) from the
holder of the compressor shell.
(7) Loosen the clamp on the separator and unbind the lead
wires.
7. Removing the 4-way valve coil (21S4), 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 the 4-way valve 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
board in the control box.
(6) Loosen the clamp on the separator and unbind the lead
wires.
[Removing the linear expansion valve 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 the control box. (Refer to procedure 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 4 side panel (R) fixing screws (5 × 12) in the rear
of the unit and then remove the side panel (R).
(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
removing the right side panel.
Note 3: When installing the four-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.
OCH415G
Photo 7 (PUHZ-P100VHA2 / VHA3(R1))
Thermistor
<Discharge> (TH4)
Photo 8
Photo 9
LEV
131
PHOTOS
Thermistor
<Outdoor pipe> (TH3)
4-way valve coil
LEV coil (LEV A)
fixing screw
4-way valve
LEV coil (LEV A)
4-way valve
4-way valve
coil (21S4)