Hitachi RAS-8HNCE - Page 42

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Electrical wiring
PMML0317A rev.1 - 11/2013
15.3.4 System installation DIP Switch Setting
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Dip Switch Setting of Indoor PCB and Outdoor PCB for H-LINK II
It is required to set dip switches of every indoor unit and outdoor unit and match of the transmission circuit impedance.
• Dip Switch Setting Example:
Cycle nº 0
DSW5
Terminating Resistance
DSW4
Refrigerant Cycle Nº
(Setting for ten digit)
RSW1
Refrigerant Cycle Nº
(Setting for last digit)
Outdoor units
Indoor units
DSW5
Refrigerant Cycle Nº
(Setting for ten digit)
RSW2
Refrigerant Cycle Nº
(Setting for last digit)
DSW6
Indoor unit Address
(Setting for ten digit)
RSW1
Indoor unit Address
(Setting for last digit)
Cycle nº 1
Cycle nº 2
Unit Name of Dip Switch Mark
Setting Before
Shipment
Function
Outdoor Unit
Refrigerant Cycle
DSW4
RSW1
DSW4 RSW1
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
Terminating Resistance DSW5
For matching impedance of transmission circuit, set the DSW5 accord-
ing to the quantity of outdoor units in the H-LINK system.
Indoor Unit
Refrigerant Cycle
DSW5
RSW2
DSW5 RSW2
For setting refrigerant cycle address of indoor units. Set the DSW5 and
RSW2 corresponding to the address of outdoor unit in the same refriger-
ant cycle.
Indoor Unit Address
DSW6
RSW1
DSW6 RSW1
For setting indoor unit address. Set the DSW6 and RSW1 not to overlap
the setting of other indoor units in the same refrigerant cycle. (If not set,
the automatic address function is performed).