OPERATING PROCEDURE
PHOTOS
55
4. Removing the thermistor <Plate HEX Liquid> (TH6)
(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.
(4) Loosen the clamps for the lead wire.
(5) Pull out the thermistor <Plate HEX Liquid> (TH6) from the
sensor holder.
Note: When replacing thermistor <Plate HEX Liquid>(TH6),
replace it together with thermistor<Ambient> (TH7),
since they are combined together.
Refer to No.5 below to remove thermistor <Ambient>.
5. Removing the thermistor <Outdoor 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.
(4) Loosen the clamps for the lead wire.
(5) Pull out the thermistor <Ambient> (TH7) from the sensor
holder.
Note: When replacing thermistor <Ambient> (TH7), replace
it together with thermistor <Plate HEX Liquid> (TH6),
since they are combined together. Refer to No.4
above to remove thermistor <Plate HEX Liquid>.
6. Removing the thermistor <Liquid> (TH3) and thermistor
<Discharge> (TH4), thermistor <Comp. surface> (TH33)
(1) Remove the service panel. (See Photo 1)
(2) Disconnect the connectors, TH3 (white), TH4 (white), and
TH33 (yellow) on the controller circuit board.
(3) Loosen the clamps for the lead wire.
(4) Pull out the thermistor <Liquid> (TH3) (See Photo 5) and
thermistor <Discharge> (TH4) from the sensor holder.
[Removing the thermistor <Comp. surface> (TH33)]
(5) Pull out the thermistor <Comp. surface> (TH33) from the
holder of the compressor surface.
7. Removing the thermistor <Inlet Water> (TH32)
(1) Remove the service panel. (See Photo 1)
(2) Remove 2 screws (5 × 12) and remove the front cover
panel.
(3) Remove 3 stay fixing screws (4 × 10) and remove the stay.
Remove 5 side panel (R) fixing screws (5 × 12) and remove
the right side panel.
(4) Disconnect the connector, TH32 (black) on the controller
circuit board.
(5) Loosen the clamp for the lead wire.
(6) Remove the thermistor <Inlet water> (TH32) from the plate
heat exchanger.
Note: Before removing the thermistor<Inlet water> (TH32),
recover water in the plate heat exchanger.
Photo 5
Photo 6
Photo 7
Photo 8
Plate HEX liquid
thermistor (TH6)
Receiver
Plate heat exchanger
fixing screw
Liquid thermistor
(TH3)
Plate heat
exchanger
Sensor holder for ambient thermistor (TH7)
Discharge ther-
mistor (TH4)
Plate heat
exchanger
Inlet water
thermistor (TH32)
OCH465D
