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PMML0129A rev.4 - 02/2010
ELECTRICAL WIRING
15.4. 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.
Unit
Name of Dip Switch
Mark
Setting Before Shipment
Function
Outdoor Unit
Refrigerant Cycle
DSW4
&
RSW1
0
For setting refrigerant cycle address of outdoor unit. Set the
DSW4 and RSW1 not to overlap the setting of other outdoor
units in the same H-LINK system.
End Terminal Resistance
DSW5
For matching impedance of transmission circuit. Set the
DSW5 according to the quantity of outdoor units in the
H-LINK system. Setting of End Terminal Resistance.
Before shipment, No. 1 pin of DSW5 is set at the “ON” side.
In the case that the outdoor units quantity in the same H-link
is 2 or more, set No. 1 pin of DSW5 at the “OFF” side from
the 2nd unit. If only one outdoor unit is used, no setting is
required.
Indoor Unit
Refrigerant Cycle
DSW5
For setting refrigerant cycle address of indoor unit. Set the
DSW5 corresponding to the address of outdoor unit in the
same refrigerant cycle.
Indoor Unit Address
RSW
0
For setting indoor unit address. Set the RSW not to overlap
the setting of other indoor units in the same refrigerant cycle.
(If not set, the automatic address function is perfomed.)
