82
Electrical parts box
Controller circuit
board (C.B.)
Electrical
parts box
fixing
screw
Terminal
block
(TB1)
OPERATING PROCEDURE
PHOTOS
4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)
and thermistor <Outdoor pipe> (TH3)
(1) Remove the service panel. (See photo 2.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the front panel. (See photo 1.)
(4) Remove the back panel fixing screws, 4 from the right and
3 from the rear side, and detach the back panel.
(See photo 1.)
(5) Disconnect the connector TH3 (white) or TH6/7 (red) on
the controller circuit board in the electrical parts box.
(6) Loosen the clamp for the lead wire in the rear of the
electrical parts box.
(7) Pull out the thermistor <Outdoor pipe> (TH3) and
thermistor <Outdoor 2-phase pipe> (TH6) from the
sensor holder.
Note: In case of replacing the thermistor <Outdoor 2-phase
pipe> (TH6), replace it together with the thermistor
<Outdoor> (TH7), since they are combined together.
Refer to No. 5 below to remove the thermistor
<Outdoor> (TH7).
3. Removing the electrical parts box
(1) Remove the service panel. (See photo 2.)
(2) Remove the top panel. (See photo 1.)
(3) Remove the front panel. (See photo 1.)
(4) Disconnect the indoor/outdoor connecting wire from
terminal block.
(5) Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve, thermistor<Outdoor pipe>,
thermistor<Discharge>, thermistor<Outdoor 2-phase pipe>,
thermistor<Outdoor>, high pressure switch, four-way valve
and bypass valve.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (FAN11 and FAN12)
• Linear expansion valve (LEV-A and LEV-B)
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)
• High pressure switch (63H)
(6) Remove the terminal cover and disconnect the compressor
lead wire.
(7) Remove the electrical parts box fixing screws, 1 from the
front, the right and the rear side, and detach the electrical
parts box by pulling it upward.
Photo 5
Motor for
compressor (MC)
Terminal
cover
Photo 6
Thermistor
<Outdoor 2-phase pipe>
(TH6)
Clamp
Electrical
parts box
Thermistor
<Outdoor 2-phase
pipe> (TH6)
OC294-D-3.qxp 05.3.9 11:04 AM Page 82
