Checking Of Electrical Wiring - Hitachi FSG Series Service Manual

1.1.2

CHECKING OF ELECTRICAL WIRING

n Check to ensure that the terminal for power source wiring
(terminals "L1" to "L1" and "N" to "N" of each terminal
board: AC380-415V, terminals "R" to "R" and "T" to "T" of
each terminal board: AC220V) and intermediate wiring
(Operating Line: terminals "1" to "1" and "2" to "2" of each
terminal board: DC5V) between the indoor unit and the
outdoor unit coincide correctly, as figure below. If not,
some component will be damaged.
n Check to ensure that the twist pair cable with shield
(˜ 0.75 mm²) are used for intermediate wiring to protect
noise obstacle at total length of less than 1000 m and
size complied with local code.
n Check to ensure that the wirings and the breakers are
chosen correctly, as shown in table beside.
n All the field wiring and equipment must comply with local
code.
Example for Electrical Wiring Connection of FSG and FS3 System
Outdoor Unit
Models: RAS-5FSG
RAS-5FS3
RAS-8FSG
RAS-8FS3
RAS-10FSG
RAS-10FS3
RAS-16FSG
RAS-16FS3
RAS-20FSG
RAS-20FS3
ELB
Main Switch
: Terminal Board
: Printed Circuit Board
: Field Wiring
: Field Wiring
: Field-Supplied
: Optional Accessory
Electrical Data and Recommended Wiring, Breaker Size/1
Outdoor Unit
0RGHO
5$6)6*
5$6)6
5$6)6*
5$6)6
5$6)6*
5$6)6
5$6)6*
5$6)6
5$6)6*
5$6)6
ELB: Earth leakage Breaker: Apply low sensibility type.
MLFC: Flame Retardant Polyflex Wire.
Note: Regarding the wiring or breakers, follow to the local
code.
Max. 4 Outdoor Units / Power supply line (5, 8, 10 HP)
1 Outdoor Unit / Power supply line (16, 20 HP)
No.0 System No.1 System
Outdoor Unit Outdoor Unit
Indoor Unit
Remote
Control
Cable
Remote
Control
Switch
No.0 System Indoor Units
(Max.16 Units per Refrigerant Cycle)
TROUBLESHOOTING
0D[ 3RZHU
5XQQLQJ 6XSSO\
1RPLQDO
3RZHU
&XUUHQW /LQH
FXUUHQW
6XSSO\
$ ‘ PP
0/)&

64
0/)&

64

0/)&
9 
64
+]
0/)&

64 ([ 
0/)&

64 ([ 
No.2 System
Outdoor Unit
Operating Line (Shielded Wires)
DC5V (Non-Pole Transmission,
H-LINK System)
Indoor Unit Indoor Unit
Control Cable Control Cable
1
5
(/%
)XVH
1RPLQDO
6HQVLWLYH
&XUUHQW
$
$ P$
 
 

 
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No.2 System
Outdoor Unit