Mitsubishi Electric PUHZ-FRP71VHA2 Service Manual page 85

OPERATING PROCEDURE
4. Removing the thermistor <Liquid> (TH3) and the thermis-
tor <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) and TH3 (white)on
the controller circuit board in the electrical parts box.
(4) Loosen the 2 clamps for the lead wires on the top of the
electrical parts box.
(5) Pull out the thermistor <2-phase pipe> (TH6) and the
thermistor <Liquid> (TH3) from each sensor holders.
Note: When replacing thermistor <2-phase pipe> (TH6),
replace it together with thermistor <Ambient> (TH7),
since they are combined together. Refer to proce-
dure 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) Disconnect the lead wires from the wire clip on the out-
door controller board in the electrical parts box.
(5) Loosen the clamp for the lead wire in the rear of the elec-
trical parts 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 No.4 above to remove ther-
mistor <2-phase pipe>.
6. Removing the thermistor <Discharge> (TH4) and thermis-
tor <Comp. surface> (TH33)
(1) Remove the service panel. (See Photo 1)
(2) Disconnect the connectors TH4 (white) and TH33 (black)
on the controller circuit board in the electrical parts box.
(3) Disconnect the lead wires from the wire clip on the out-
door controller board in the electrical parts box.
(4) Loosen the clamp for the lead wire in the rear of the elec-
trical parts box. (See Photo 4)
(5) Pull out the thermistor <Discharge> (TH4) from the sen-
sor holder.
[Removing the thermistor<Comp. surface> (TH33)]
(6) Remove the compressor cover (upper) and pull out the
thermistor <Comp. surface> (TH33) from the holder of
the compressor surface. (TH33 : See Figure 1)
OCH665B
PHOTOS/FIGURES
Photo 5
Electrical parts box
Thermistor
<Liquid> (TH3)
Photo 6
Lead wire of thermistor
<Ambient> (TH7)
Photo 7
85
Clamp
Thermistor
<2-phase pipe>
(TH6)
Sensor holder
Thermistor
(TH4) <Discharge>
Thermistor
(TH33) <Comp. surface>