Checking Of Electrical Wiring - Hitachi Utopia RPI-2.5HRG Service Manual

1.1.2 Checking of Electrical Wiring

G Check to ensure that the terminal for power source wiring (terminals "L1" to "L1" and "N" to "N" 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.
G Check to ensure that the twist pair cable with shield (≥0.75mm2) are used for intermediate wiring to
protect noise obstacle at total length of less than 1000m and size complied with local code.
G Check to ensure that the wirings and the breakers are chosen correctly, as shown in Table 1.1.
G All the field wiring and equipment must comply with local codes.
Example for Electrical Wiring Connection (Single Type)
RAS-3HVRG
RAS-4HVRG
1 1
220V / 50Hz 220V / 50Hz
240V / 50Hz 240V / 50Hz
220V / 60Hz 220V / 60Hz
Main Switch Main Switch
*ELB *ELB
ELB ELB
Outdoor Unit
L2
L1
1 2
N
Earth
Wiring
Power Source Cable
Pay an attention to the phase
of power source when wiring.
NOTE:
In case of the other wiring connection, refer to Technical Catalogue II.
Table 1.1 Electrical Data and Recommended Wiring, Breaker Size/1 Outdoor Unit
Model
RAS-3HVRG
220-240V/50Hz,
RAS-4HVRG
RAS-5HVRG
ELB: Earthleakage Breaker: Apply low sensibility type.
MLFC: Flame Retardant Polyflex Wire
NOTE:
Regarding the wiring or breakers, follow to the local code.
Remote
Control Switch
(Option)
Remote Control
Switch Cable
(Field-Supplied)
Shielded Twist-Pair Cable
2
0.75m x 2
This cable dose not have
any polarity.
Do not apply an excessive
voltage to this cable.
(Rated Voltage: 12V)
Indoor Unit
L1 L2 N 1 2 A B
Mp
Earth
Wiring
Control Cable
Shielded Twist-Pair Cable 0.75m
This cable dose not have any polarity.
Do not apply an excessive voltage to this
cable. (Rated Voltage: 5V)
Wiring Connection for Single Type
Max.
Running
Power
Current
Supply
(A)
22
23
220V/60Hz
31
RAS-5HVRG
1
220V / 50Hz
240V / 50Hz
220V / 60Hz
Main Switch Main Switch
*ELB
ELB
Outdoor Unit
L2
E L1
N
Earth
Wiring
Power Source Cable
Pay an attention to the phase
2
x 2
of power source when wiring.
Power
Supply
Nominal
Line
Current
(φmm)
MLFC 1.25SQ
MLFC 2SQ
TROUBLESHOOTING
Remote Control
Switch Cable
(Field-Supplied)
1
220V / 50Hz
Shielded Twist-Pair Cable
2
240V / 50Hz
0.75m x 2
220V / 60Hz
This cable dose not have
any polarity.
Do not apply an excessive
voltage to this cable.
(Rated Voltage: 12V)
*ELB
ELB
Indoor Unit
1 2 L1 L2 N 1 2 A B
Mp
Control Cable
Shielded Twist-Pair Cable 0.75m
This cable dose not have any polarity.
Do not apply an excessive voltage to this
cable. (Rated Voltage: 5V)
ELB
Nominal
Fuse
Sensitive
Current
(A) (mA)
40
30
50
Remote
Control Switch
(Option)
Earth
Wiring
2
x 2
(A)
40
40
50
1-5