Mitsubishi Electric PUZ-WM50VHA Service Manual page 75

Air to water heat pump units
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OPERATING PROCEDURE
9. Removing the thermistor <Discharge> (TH4) and thermis-
tor <Comp. Surface> (TH33)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the cover panel (front). (See Photo 3-1)
(4) Remove the comp case (top). (See Photo 3-2)
(5) Remove the comp case (front). (See Photo 3-2)
(6) Disconnect the connectors TH4 (WH) and TH33(YE) on the con-
troller circuit board in the electrical parts box. (See Photo 3-1)
(7) Loosen the fasteners, wire clip and cable straps for the
lead wires in the electrical parts box.
(8) Loosen the bands for the lead wires.
(9) Loosen the clamps for the lead wire in the separator.
(10) Pull out the thermistor <Discharge> (TH4) from thermistor holder.
(11) Pull out the thermistor <Comp. Surface> (TH33) from
thermistor holder, then remove the terminal cover fixing
screw of nut (1 for front/ M5).
10. Removing the thermistor <Plate Hex Liquid> (TH34)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the connector TH34 (RD) on the controller cir-
cuit board in the electrical parts box. (See Photo 3-1)
(4) Loosen the fasteners and wire clips for the lead wire in the
electrical parts box.
(5) Loosen the clamp for the lead wire on the bottom of elec-
trical parts box.
(6) Detach the thermistor <Plate Hex Liquid> (TH34).
OCH727
PHOTOS/FIGURES
Photo 9
Thermistor <Comp.
Surface> (TH33)
Photo 10
75
Thermistor
<Discharge> (TH4)
Thermistor
<Plate hex liquid>
(TH34)

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