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

4 Electrical and control settings
Unit electrical wiring and connection

4.1.9 Electrical connection of RPIM 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
Check that the power supply for the RPIM indoor unit is 230 V. If not, replace connectors CN on the TF transformers in
the electrical box.
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N O T E
• The service access panel for the indoor unit fan motor is at the bottom of the unit.
• Remove the service access panel.
• Cut the centre of the rubber bushing in the wiring connection hole.
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N O T E
• To prevent the screws from falling from the terminal box, do not remove them completely, hold onto the terminal and check that the
screw is secure through the hole in the terminal.
• Use the following screws for the terminal box:
- M4 screw for the power supply.
- M3.5 screw for the operating line.
Follow the steps below to connect the remote control cable or the optional extension wire:
1 Pass the cable through the knock-out hole in the cabinet.
2 Connect the cable to terminals A and B of the terminal strip
(TB1).
3 Tighten the screw on terminals A and B.
4 Check that the cables are correctly secured.
Follow the steps below to connect the power cables to the terminal
strip (TB):
1 Where necessary, loosen the screws on terminals L1 and N on
the terminal strip (TB).
2 Connect the power cables to terminals L1 and N.
3 Tighten the screws on terminals L1 and N.
4 Check that the cables are correctly secured.
145 SMGB0099 rev.0 - 12/2016
Remote control
Power supply wires
(PC-ARFPE)
(single phase)
Transmission
wires
4
Earth screw