General Check; Electrical Wiring Connection - Hitachi CH-4.0NE Installations- Und Benutzerhandbuch

6.1. GENERAL CHECK

- 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 indicated in Technical Catalogue. Make sure that the components comply with
National Electrical code (NEC)
- Check to ensure that the power supply voltage is within ±10% of rated voltage.
- Check the power source capacity is too low, the system cannot be started due to the voltage drop.
- Check to ensure that the ground wire is connected.

6.2. ELECTRICAL WIRING CONNECTION

The electrical wiring connection is shown in below figure.
1. Turn OFF the main power switch and take off the electrical box cover of CH unit.
2. Cut out the center of the rubber bushing in the wiring connection hole, as shown below.
3. Connect the power supply and earth wires to the terminals in the electrical box.
4. Connect the wires of the operating line to the terminals in the electrical box.
ELECTRICAL WIRING
No Description
Electrical Box Cover
Fixing Screw
Printed circuit Board
Noise Filter
Cord Clamp
Terminal Board
Operating Line
Power Supply Line
NOTE:
At the terminal board 2, the
connectors 1 and 2 are for
H Link system, and the
connectors 3 and 4 are for
going to the Indoor Unit
from the CH-Box setting of
dip switches
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