Removing The 4-Way Valve Coil; Removing The Linear Expansion Valve Coil - Mitsubishi Electric PUZ-A18NHA4 Service Manual

OPERATING PROCEDURE
5. Removing the thermistor <Outdoor> (TH7)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the connector TH7 (red) on the controller
circuit board in the electrical parts box.
(4) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(5) Pull out the thermistor <Outdoor> (TH7) from the sensor
holder.
Note: In case of replacing thermistor <Outdoor> (TH7),
replace it together with thermistor <Outdoor 2-phase
pipe> (TH6), since they are combined together.
Refer to No.4. to remove thermistor
<Outdoor 2-phase pipe>.
6. Removing the thermistor <Shell> (TH32)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the front panel. (See Photo 1)
(4) Remove the back panel. (See Photo 1)
(5) Remove the electrical parts box. (See Photo 5)
(6) Remove the sound proof cover (upper) for compressor.
(6) Pull out the thermistor <Shell> (TH32) from the holder of
the compressor shell.
7. Removing the 4-way valve coil (21S4)
and linear expansion valve coil (LEV-A)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the front panel. (See Photo 1)
(4) Remove the conduit cover and cord cover.
(5) Remove the back panel. (See Photo 1)
(6) Remove the electrical parts box. (See Photo 5)
[Removing the 4-way valve coil (21S4)]
(7) Remove 1 4-way valve coil fixing screw (M4 × 6).
(8) Remove the 4-way valve coil by sliding the coil to the right.
[Removing the linear expansion valve coil (LEV-A)]
(9) Remove the linear expansion valve coil by sliding the coil
upward.
Photo 7
Electrical parts box
Photo 8
Sound proof
cover
Photo 9
4-way valve coil
(21S4)
108
PHOTOS
Thermistor <Outdoor>
(TH7)
Sensor holder
Compressor (MC)
4-way valve coil
4-way valve
fixing screw
Linear expansion valve
Linear expansion
valve coil (LEV-A)