Mitsubishi Electric PUHZ-SW75VHA Service Manual page 71

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) Disconnect the connectors, TH7/6 (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.
(5) Pull 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 Photo 1)
(3) Disconnect the connector TH7/6(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 <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) and thermistor
<Discharge> (TH4), thermistor <Comp. surface> (TH34)
(1) Remove the service panel. (See Photo 1)
(2) Disconnect the connectors, TH3 (white) and TH4 (white),
TH34 (red) on the controller circuit board in the electrical
parts box.
(3) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(4) Pull out the thermistor <Liquid> (TH3), and thermistor
<Discharge> (TH4) from the sensor holder.
[Removing the thermistor<Comp. surface> (TH34)]
(5) Remove the sound proof cover (upper) for compressor.
(6) Pull out the thermistor <Comp. surface> (TH34) from the
holder of the compressor shell.
OCH533A
Photo 4
Electrical parts box
Photo 5
Lead wire of thermistor <Ambient> (TH7)
Photo 6
Thermistor
<Comp. surface>
(TH34)
71
PHOTOS
Thermistor <2-phase pipe>
(TH6)
Clamp
Controller
circuit board (C.B.)
Sensor holder
Thermistor <Liquid> (TH3)
Motor for compressor
Thermistor
(MC)
<Discharge>
(TH4)