Electrical Connection Of Rpk Units - Hitachi RCI-1.0FSN4 Service Manual

4 Electrical and control settings
Unit electrical wiring and connection

4.1.10 Electrical connection of RPK units

Work prior to the electrical connection
1 Turn off the power supply switches before starting work and fit the appropriate locks and safety warnings.
2 Wait 5 minutes after turning off the power supply switches.
3 Check that the fans on the indoor and outdoor units are at a standstill before starting work.
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N O T E
• The electrical power for the unit must involve a specific power line, with an exclusive power control switch and residual current breaker,
installed in line with local or national safety regulations.
• Check that the electrical power line has enough capacity to supply the unit. Its length, the cable diameter and their protection (sleeve
or jacket) must be appropriate for the unit.
• For further information, always consider the current regulations in the country where the unit is to be installed.
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C A U T I O N
• Risk of fire: cables must never touch the refrigerant pipes, printed circuit boards (PCB), sharp edges or electrical components inside
the unit to avoid damaging them.
• Loose connection terminals may lead to cable and terminal overheating. The unit may operate incorrectly, leading to a risk of fire.
Check that the cables are firmly secured to the connection terminals.
Electrical connection
!
C A U T I O N
• Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and wire
terminals) have been properly selected according to the electrical data given in "Technical Catalogue". Make sure that the components
comply with National Electrical Code (NEC).
• Use the shielded twist pair cable for the control cable between the outdoor unit and the indoor unit, the control cable between indoor
units and the remote control switch cable of PC-ARFPE.
• Check to ensure that the power supply voltage is 230V.
• Check the capacity of the electrical wires. If the power source capacity is too low, the system cannot be started due to the voltage drop.
• Check to ensure that the earth wire is connected.
The electrical wiring capacity of the outdoor unit should be referred according to "Installation & Operation Manual" of the
outdoor unit. Setting dip switch may be required depending on the combination with the outdoor unit.
1 Connect the power source cables (L1 and N phases (1~ 230V 50Hz)) to the terminal board correctly.
RPK-(0.6-1.5)FSN(H)3M
TB2
A B 1 2
Transmission
Remote
wires (H-LINK)
control
2 Connect the control cables between the indoor unit and the outdoor unit correctly. Check to ensure that the terminal
for power source cable (Terminals "L1" to "L1" and "N" to "N" of each terminal board: AC220-240V) between the
indoor unit and the outdoor unit coincide correctly. If not, some component will be damaged.
147 SMGB0099 rev.0 - 12/2016
TB1
L1 N
(Mp)
Power source line
RPK-(2.0-4.0)FSN3M
Power source line
Remote Transmission
control wires (H-LINK)
4