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PMGB0126A rev.2 - 11/2006
English
ELECTRICAL WIRING
13.3. COMMON WIRING
CAUTION:
All the field wiring and electrical components must comply with local codes.
13.3.1. ELECTRICAL WIRING BETWEEN INDOOR UNIT AND OUTDOOR UNIT
Connect the electrical wires between the indoor unit and the outdoor unit, as shown below.
Check to ensure that the terminal for power source wiring (terminals “L1” to “L1”, “L2” to “L2”, “L3” to “L3” and “N” to “N” of each
terminal board: AC380-415V), and intermediate wires (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. If not, some component will be damaged.
Follow local codes and regulations when performing electrical wiring.
Connect the operation wiring to the units in the same refrigerant cycle (The refrigerant piping and the control wiring should be
connected to the same indoor units). If the refrigerant piping and the control wiring are connected to the units in the different
refrigerant cycle, it may cause a abnormal operation.
Use twisted shielded pair wiring for operation wiring between outdoor unit and indoor unit, and also for operation wiring
between indoor units (H-Link connection)
It can be also used Shielded pair wiring.
Shield shall be connected to earth only in one cable side.
Do not use more than 3 cores for operation wiring (H-Link). Core sizes must be selected according to the national regulations.
Connect the operating line for the units in the same refrigerant cycle (The refrigerant line shall be connected to the indoor units
with the refrigerant piping connected to the same outdoor unit). In the case that each of the refrigerant piping and the operating
line is connected to the units of different cycle, it may cause an abnormal operation.
Open a hole near the connection hole of power source wiring when multiple outdoor units are connected from one power
source line.
The recommended breaker sizes are shown in Table of electrical data and recommended Wiring, Breaker Size/1 O.U.
In the case that a conduit tube for field-wiring is not used, fix rubber bushes with adhesive on the panel.
All the field wiring and equipment must comply with local and international codes.
ATTENTION:
Pay attention to the connection of the operating line. Incorrect connection may cause the failure of PCB.
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