Removing The Thermistor - Mitsubishi Electric PUHZ-RP250YHA2 Service Manual

OPERATING PROCEDURE
4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Disconnect the connectors, TH6 and TH7 (red), on the
controller circuit board in the electrical parts box.
(4) Loosen the 2 wire clamps on top of the electrical parts box.
(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)
from the sensor holder.
Note: In case of replacing thermistor <Outdoor 2-phase
pipe> (TH6), replace it together with thermistor
<Outdoor> (TH7) since they are combined together.
Refer to No.6 below to remove thermistor <Outdoor>.
5. Removing the thermistor <Outdoor> (TH7)
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Disconnect the connector TH7 (red) on the controller circuit
board in the electrical parts box.
(4) Loosen the 2 wire clamps on top of the electrical parts box.
(See photo 4.)
(5) Pull out the thermistor <Outdoor> (TH7) from the sensor
holder.
Note: In case of replacing thermistor <Outdoor> (TH7),
replace it together with thermistor <Outdoor 2-
phase pipe> (TH6), since they are combined together.
Refer to No.5 above to remove thermistor <Outdoor
2-phase pipe>.
6. Removing the thermistor <Outdoor pipe> (TH3) and ther-
mistor <Discharge> (TH4)
(1) Remove the service panel. (See figure 1.)
(2) Disconnect the connectors, TH3 (white) and TH4 (white)
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.
[Removing the thermistor<Outdoor pipe>(TH3)]
(4) Pull out the thermistor <Outdoor pipe> (TH3) from the
sensor holder.
[Removing the thermistor<Discharge>(TH4)]
For RP200
(4) Remove the soundproof cover(upper) for compressor.
(5) Pull out the thermistor <Discharge> (TH4) from the ther-
mo-holder of the compressor shell.
For RP250
(4) Pull out the thermistor <Discharge> (TH4) from the sen-
sor holder.
PHOTOS
Photo 4
Electrical parts box
Clamp
Photo 5
<Outdoor>
Lead wire of thermistor
Photo 6
Thermistor <Outdoor pipe>
Thermistor
<Discharge>
(TH4)
Soundproof
cover(upper) for
compressor
Compressor
(MC)
94
Thermistor
<Outdoor 2-phase pipe>
(TH6)
Sensor holder
(TH7)
(Photo:PUHZ-RP250YHA2)
(TH3)