Mitsubishi Electric PUZ-A18NHA4 Service Manual page 112

OPERATING PROCEDURE
4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the connectors, TH6 and 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.
(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)
from the sensor holder.
Note: In case of replacing thermistor <Outdoor 2-phase
pipe> (TH6), replace it together with thermistor
<Outdoor> (TH7), since they are combined together.
Refer to No.5 below to remove thermistor <Outdoor>.
5. Removing the thermistor <Outdoor> (TH7)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 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 above to remove thermistor
<Outdoor 2-phase pipe>.
6. Removing the thermistor <Outdoor pipe> (TH3)
(1) Remove the service panel. (See Figure 1)
(2) Disconnect the connector TH3 (white) 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 <Outdoor pipe> (TH3) from the
sensor holder.
7. Removing the thermistor <Shell> (TH32)
(1) Remove the service panel. (See Figure 1)
(2) Disconnect the connector TH32 (black) on the controller
circuit board in the electrical parts box.
(3) Loosen the clamp for the lead wire under the electrical
parts box. (See Photo 4)
(4) Pull out the thermistor <Shell> (TH32) from the holder of
the compressor shell.
Photo 4
Electrical
Controller
parts box
circuit board
(C.B.)
Photo 5
Lead wire of thermistor <Outdoor> (TH7)
Photo 6
Photo 7
112
PHOTOS
Thermistor
<Outdoor 2-phase pipe>
(TH6)
Sensor holder
Thermistor
<Outdoor pipe> (TH3)
Clamp
Thermistor
<Shell>
(TH32)
Clamp