142
Photo 5
Photo 7
Clamp
Controller
circuit board (C.B.)
Thermistor <Outdoor
2-phase pipe>(TH6)
6.
Removing the thermistor <Liquid> (TH3), thermistor
<Ref. check> (TH33), thermistor <Discharge> (TH4) and
thermistor <Comp. surface> (TH32)
(1) Remove the service panel. (See Photo 1)
(2)
Disconnect the connectors, TH3 (white) and TH4 (white),
TH33 (yellow), TH32 (black) on the controller circuit board
in the electrical parts box.
(3)
Loosen the clamp for the lead wire under the electrical
parts box.
(4) Disconnect the lead wires from 4 fasteners and 2 cable
straps on the outdoor controller board in the electrical parts
box.
(5)
Pull out the thermistor <Liquid> (TH3), thermistor <Ref.
check> (TH33) and thermistor <Discharge> (TH4) from the
sensor holder.
[Removing the thermistor<Comp. surface> (TH32)]
(6) Remove the sound proof cover (upper) for compressor.
(7)
Pull out the thermistor <Comp. surface> (TH32) from the
holder of the compressor surface. (TH33: See Photo 9 or
Figure 1)
Electrical parts box
Photo 6
Thermistor <Liquid> (TH3)
Thermistor
<Discharge>
(TH4)
Lead wire of thermistor <Ambient> (TH7)
Sensor holder
Photo 8
Compressor
Sound proof cover
Thermistor
<Comp. surface> (TH32)
4. Removing the thermistor <Outdoor 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 (red), on the controller
circuit board in the electrical parts box.
(4) Disconnect the lead wires from 2 fasteners on the outdoor
controller board in the electrical parts box.
(5)
Loosen the 2 wire clamps on top of the electrical parts box.
(6)
Pull out the thermistor <Outdoor 2-phase pipe> (TH6) from
the sensor holder.
Note:
When replacing thermistor <Outdoor 2-phase pipe>
(TH6), replace it together with thermistor <Ambient>
(TH7) since they are combined together.
Refer to procedure No.6 below 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 (red) on the controller cir-
cuit board in the electrical parts box.
(4) Disconnect the lead wires from 2 fasteners on the outdoor
controller board in the electrical parts box.
(5)
Loosen the 2 wire clamps on top of the electrical parts box.
(See Photo 11)
(6)
Pull out the thermistor <Ambient> (TH7) from the sensor
holder.
Note:
When replacing thermistor <Ambient> (TH7),
replace it together with thermistor <Outdoor 2-
phase pipe> (TH6), since they are combined together.
Refer to procedure No.4 above to remove thermis-
tor <Outdoor 2-phase pipe>.
OPERATING PROCEDURE
PHOTOS
OCH451D