Removing The Thermistor; Operating Procedure - Mitsubishi Electric PUHZ-SW75VHA Service Manual

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 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.
(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 <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) 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 elec-
trical 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 compressor cover (upper) and pull out the
thermistor <Comp. surface> (TH34) from the holder of the
compressor Comp.surface.
OCH533A
PHOTOS
Photo 4
Electrical parts box
Controller circuit board (C.B.)
Photo 5
Lead wire of thermistor <Ambient> (TH7)
Photo 6
Comp. surface
thermistor (TH34)
66
Thermistor
<2-phase pipe> (TH6)
Clamp
Sensor holder
Liquid thermistor
(TH3)
Dischage
thermistor (TH4)