2-56
TC-12001
4-WAY CASSETTE
26
P5414946-rev.1
(8) When installing the unit in Australia, connect
the both ends of shielded twist pair cable
(remote control switch cable and control
cable) to the earth as shown bellow.
Fig. 7.1 Electrical Wiring Connection for Indoor Unit
(9) The wiring work for the indoor unit should be
performed according to the electrical wiring
diagram and “Installation & Maintenance
Manual” of the outdoor unit.
(10) In Case that Power Source (220V / 240V) Is
Applied to Control Line
If 220V / 240V is applied to the control line
(Terminal 1 and 2 of TB2) due to mistake,
the fuse on the PCB for the control line will
blow out. In this case, perform the recovery
work as shown in the below.
(a) Reconnect the wirings correctly.
(b) Set No.1 pin of DSW7 (on PCB) at ON
side.
PCB is recovered from the fuse blowing out.
However, if 220V / 240V is applied to the
control line again, PCB will break and not be
able to recover.
Shielded Twist Pair Cable
Shield
Earth
Earth
Wires
>PS
<
HS-HB
HITACHI AIR( / )CONDITIONER
Model
THM5
THM3
CN11
CN2
CN1
PCN6
CN17
THM1
THM2
PCN4
-
S
/N
R
/L
1
2
1
B
A
K
DRAI
N
>PS<
OA
OA
INLET
D
N112
2
1
B
A
L
R
S
LED3
LED1
RSW2
CN6
HA
CN14
CN4
CN3
CN9
CN10
IC1
DSW5
CN1
1
CN34
DSW4
TP
ON
1
2
3
4
ON
1
2
DSW9
ON
1
2
3
4
5
6
DSW6
ON
1
2
3
4
5
6
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
ON
1
2
3
4
5
6
RSW1
DSW3
LED6
CN28
CN5
THU1
THM5
THM4
CN33
LED4
CN2
L3
EF2
+
+
THM3
THM2
THM1
CN7
CN36
CN8
+
+
+
REG2
L1
SW1
PCN1
TR1
LED5
DM1
T1
PCN6
PCN7
EFS1
EFR1
L5
+
+
ON
1
2
CN17
DSW7
PCN4
CN1
REG3
2
1
B
A
L
Electrical Box
Terminal
Board (TB1) Terminal
Board (TB2)
Earth
Terminal
Control Cable
Remote Control
Switch Cable
Power Source
Cable
R / L1
S / N
TB2
TB1
P
Enlarged
View of P
L1
R
N
AC 220V/240V
Incorrect Wiring
Reconnect wirings correctly.
5V
A
B
1
2
S
L1
R
N
AC 220V/240V
5V
A
B
1
2
S
ON
OFF
DSW7
Set No.1 Pin
at ON side.
PCB
1 2
