Mitsubishi Electric PUHZ-SW75VHA.UK Service Manual page 78

OPERATING PROCEDURE
5. 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 outdoor
controller circuit board in the control box.
(4) Loosen the fastener on the control box and unbind the lead
wires.
(5) Loosen the 2 wire clamps on top of the control box.
(6) Pull out the thermistor <2-phase pipe> (TH6) from the
sensor holder.
Note: When replacing thermistor <2-phase pipe> (TH6),
replace it together with thermistor <Ambient> (TH7)
since they are combined together.
Refer to procedure 6 below to remove thermistor
<Ambient>.
6. 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 control box.
(4) Loosen the fastener on the control box and unbind the lead
wires.
(5) Loosen the 2 wire clamps on top of the control box.
(See Photo 5)
(6) Pull out the thermistor <Ambient> (TH7) from the sensor
holder.
Note: When replacing thermistor <Ambient> (TH7),
replace it together with thermistor <2-phase pipe>
(TH6), since they are combined together.
Refer to procedure 5 above to remove thermistor
<2-phase pipe>.
7. Removing the thermistor <Liquid> (TH3),
thermistor <Discharge> (TH4) and
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 control box.
(3) Loosen the clamp for the lead wire in the rear of the control
box. (See Photo 5)
(4) Loosen the fastener on the control box and unbind the lead
wires.
(5) Pull out the thermistor <Liquid> (TH3) and thermistor
<Discharge> (TH4) from the sensor holder.
[Removing the thermistor<Comp. surface> (TH34)]
(6) Remove the sound proof cover (upper) for compressor.
(7) Pull out the thermistor <Comp. surface> (TH34) from the
holder of the compressor shell.
OCH533B
PHOTOS
Photo 5
Control box
Clamp
Photo 6
Lead wire of thermistor
<Ambient> (TH7)
Photo 7
Thermistor
Motor for compressor
<Comp. surface>
(MC)
(TH34)
78
Thermistor
<2-phase pipe>(TH6)
Sensor holder
Thermistor <Liquid> (TH3)
Thermistor
<Discharge>
(TH4)