Mitsubishi Electric PUHZ-SW75VHAR6 Service Manual page 66

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 on the controller circuit
board. (See Photo 3)
<Symbol on the board>
• TH7/6: Thermistor <Ambient, 2-phase pipe>
(4) Loosen the fastener on the electrical parts box and
unbind the lead wires.
(5) Loosen the clamp for the lead wire in the rear of the
electrical parts 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 5 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 on the controller circuit
board. (See Photo 3)
<Symbol on the board>
• TH7/6: Thermistor <Ambient, 2-phase pipe>
(4) Loosen the fastener on the electrical parts box and
unbind the lead wires.
(5) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(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 4 to remove thermistor
<2-phase pipe>.
6. Removing the thermistor <Liquid> (TH3), thermistor
<Discharge> (TH4) and thermistor <Comp. surface> (TH34)
(1) Remove the service panel. (See Photo 1)
(2) Disconnect the connector TH3, TH4, and TH34 on the
controller circuit board. (See Photo 3)
<Symbols on the board>
• TH3: Thermistor <Liquid>
• TH4: Thermistor <Discharge>
• TH34: Thermistor <Comp. surface>
(3) Loosen the fastener and the cable strap on the electrical
parts box and unbind the lead wires.
(4) Loosen the clamp on the separator 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 compressor cover (upper) and pull out the
thermistor <Comp. surface> (TH34) from the holder of
the compressor Comp.surface.
OCH755
PHOTOS/FIGURES
Photo 4
Thermistor
<2-phase pipe> (TH6)
Electrical parts box
Photo 5
Lead wire of thermistor <Ambient> (TH7)
Sensor holder
Photo 6
Discharge
thermistor (TH4)
66
Clamps
Liquid thermistor
(TH3)
Comp. surface
thermistor (TH34)