Mitsubishi Electric PUZ-A12NKA7 Service Manual page 115

OPERATING PROCEDURE
4. Removing the thermistor <2-phase pipe> (TH6)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) D isconnect the connectors, TH6 and TH7 (red), on the
controller circuit board in the electrical parts box.
(4) L oosen the clamp for the lead wire in the rear of the
electrical parts box.
(5) P ull out the thermistor <2-phase pipe> (TH6) from the
sensor holder.
Note: In case of replacing thermistor <2-phase
pipe> (TH6), replace it together with thermistor
<Ambient> (TH7) since they are combined
together.
Refer to No.5 below to remove thermistor
<Ambient>.
5. Removing the thermistor <Ambient> (TH7)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Figure 1)
(3) D isconnect the connector TH7 (red) on the controller
circuit board in the electrical parts box.
(4) L oosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 5)
(5) P ull out the thermistor <Ambient> (TH7) from the sensor
holder.
Note: In case of replacing thermistor <Ambient> (TH7),
replace it together with thermistor <2-phase
pipe> (TH6), since they are combined together.
Refer to No.4 above to remove thermistor <2-phase
pipe>.
6. Removing the thermistor <Liquid> (TH3), thermistor
<Discharge> (TH4), thermistor <Comp. surface> (TH33),
and thermistor <Suction> (TH32)
(1) Remove the service panel.(See Photo 1)
(2) D isconnect the connectors, TH3 (white), TH32 (black),
TH4 (white), and TH33 (yellow), on the controller circuit
board in the electrical parts box.
(3) L oosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 5)
(4) P ull out the thermistor <Liquid> (TH3), thermistor
<Comp. surface> (TH33) and thermistor <Suction>
(TH32) from the sensor holder.
OCH636A
Photo 5
Electrical
parts box
Photo 6
Lead wire of thermistor
<Ambient> (TH7)
Photo 7
Thermistor
<Liquid>
(TH3)
Thermistor
<Discharge>
(TH4)
Thermistor
<Comp. surface>
(TH33)
115
PHOTOS
Clamp
Thermistor
<2-phase pipe>
(TH6)
Sensor holder
Thermistor
<Suction>
(TH32)
Compressor
(MC)