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OPERATING PROCEDURE PHOTOS
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>.
Photo 7
Photo 9
6. Removing the thermistor <Discharge> (TH4)
(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) Pull out the thermistor <Discharge> (TH4) from the sensor
holder. (See photo 8.)
w When attaching the thermistor <Discharge> (TH4), place it
to its original position.
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.
Thermistor <Outdoor>
(TH7)
Sensor holder
Electrical parts box
Photo 8
Thermistor <Discharge> (TH4)
4-way valve
Linear expansion
valve coil (LEV-A)
Linear expansion valve
4-way valve coil
fixing screw
4-way valve coil
(21S4)
OCH429--4.qxp 07.11.20 9:20 AM Page 108