Hitachi RPIH-3.0HNAUB1Q, Operation Installation Maintenance Manual, Page: 22 / 24

2
(A) Positions of DIP Switches
(B)
(1)
16
5
(2)
(3) Safety reset (DSW7)
No setup is needed
All are set to OFF before delivery.
Other DIP switches than above-noted ones to be
set are set up before delivery, and shall not be
modified without permission, since unauthorized
modification may lead to unit malfunction.
The power supply shall be turned off before the
setup of DIP switch. The settings will be invalid if
power supply is not turned off.
H-LINK II .
H-LINK II .
The refrigeration system codes of all indoor units
are required to be set based on the position
diagram below. All are set to OFF before delivery.
H-LINK II.
H-LINK II.
* In the case of applying high voltage to
terminals 1 and 2 of TB2, the fuse on the PCB,
is cut.
In such a case, firstly connect the wiring to TB2,
and then turn on NO.1 pin.
The indoor unit numbers of all indoor units are
not required. The indoor unit numbers are set by
the auto-address function. If the indoor unit
number setting is required, set the unit numbers
of all indoor units respectively and serially by
following setting positions, It is recommended to
assign a number to each indoor unit beginning
with "1". Though a maximum of 64 indoor units
per refrigerant system can be connected to the
H-LINK II system, available numbers range from
0 to 63. Therefore, the applicable number for the
64th indoor unit will be "0".
For centralized control, this setting is required.