Hitachi RAS-2-HVNP Service Manual page 109

4. Electrical wiring
DSW4 / RSW1: Refrigerant cycle number setting (Setting is required)
In case of using an H-Link II net it is required to set the refrigerant cycle number.
Setting for the ten digit
(Factory setting)
Setting position.
Set by inserting slotted screwdriver into the
groove (setting for the last digit)
Rotary switche's positions (RSW1) are set by inserting a screw driver into the groove.
DSW5: End terminal resistance (No setting is required)
• Before shipment, No. 1 pin of DSW5 is set at ON.
• In case of having 2 or more outdoor units connected to the same H-link, set for the second unit the pin number 1 of
DSW5 at OFF.
• If only one outdoor unit is used, no setting is required.
Factory setting
Cancellation
(Setting of end terminal resistance)
N O T E
Setting for transmission
It is required to set the outdoor unit number refrigerant cycle and end terminal resistance for the H-LINK.
In the same refrigerant cycle, set the same refrigerant cycle number for the outdoor unit and the indoor units.
Example in case of setting before cycle number 25
DSW4: Turn ON pin number 2
RSW1: set dial number 5
In case that the outdoor units quantity in the same H-LINK II is 2 or more, set in the DSW5 the pin number 1 OFF side
from the second refrigerant group outdoor units. If only one outdoor unit is used (in the same H-Link II system), no setting
is required.
95
SMGB0079 rev.0 - 01/2013
ON
1 2 3 4 5 6
ON
1 2
ON
1 2
ON
1 2 3 4 5 6
0
4