74
Thermistor
<Outdoor 2-phase pipe>(TH6)
OPERATING PROCEDURE
PHOTOS
Photo 4
4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)
and thermistor <outdoor pipe> (TH3)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3)
Disconnect the connector TH3/6(Red), on the controller
circuit board in the electrical parts box.
(4)
Loosen the clamp for the lead wire of the electrical parts box.
(5)
Pull out the thermistor <Outdoor 2-phase pipe> (TH6) and
thermistor <outdoor pipe> (TH3) from the sensor holder.
Note: When replacing thermistor <Outdoor 2-phase pipe>
(TH6), replace it together with thermistor <Outdoor
pipe> (TH3), since they are combined together.
Clamp
5. Removing the thermistor <Discharge> (TH4)
(1) Remove the service panel. (See Figure 1)
(2)
Disconnect the connector TH4 (white) on the controller
circuit board in the electrical parts box.
(3) Loosen the clamp for the lead wire.
(4)
Pull out the thermistor <Discharge> (TH4) from the sensor
holder.
Electrical
parts box
Photo 5
Thermistor <Discharge> (TH4)
Thermistor
<Outdoor pipe>(TH3)
Photo 3
Electrical parts box
Controller circuit
board
(O.B.)
Electrical parts
box fixing screws
Cover panel
(Front)
Cover panel
fixing screws
Terminal block
(TB1)
Valve bed
3. Removing the electrical parts box
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3)
Disconnect the indoor/outdoor connecting wire from termi-
nal block.
(4)
Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve, thermistor<Outdoor pipe>,
thermistor<Discharge>, thermistor<Outdoor 2-phase pipe>,
crankcase heater, high pressure switch, four-way valve.
Then remove a screw (4 × 8) from the valve bed to
remove the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (MF3)
• Linear expansion valve (CNLEV)
• Thermistor <Discharge> (TH4)
•
Thermistor <Outdoor 2-phase pipe, Outdoor pipe> (TH3/TH6)
• Crankcase heater (CH)
• High pressure switch (63H)
• Solenoid valve coil <Four-way valve> (21S4)
(5)
Disconnect
the
compressor relay connector.
(6)
Remove 2 electrical parts box fixing screws (4 × 10) and
detach the electrical parts box by pulling it upward. The
electrical parts box is fixed with 2 hooks on the left and 1
hook on the right.
OC379F