Hitachi Set Free mini-HNRQ1 Series, Service Manual

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36
OPERATION
5. DIP Switch Setting of Outdoor Unit
There are several DIP Switches in the front of the outdoor unit, which are designed for the test and diagnostic
convenience. They have the advantages that they can monitor the real-time status of the outdoor unit, display the
alarm codes, view the historical alarm codes, and so on.
Figure 5.1 DIP Switches of RAS-3.0~6.5HNBRKQ1
Figure 5.2 DIP Switches of RAS-7.0~12HNBRMQ1
(1) The mark of “■” indicates the position of DIP switches. Set the DIP switches according to the introduction
of DIP switches inside the outdoor unit.
(2) Setting for Transmitting
It is required to set the refrigerant cycle No. of outdoor unit.
(3) Setting End Terminal Resistance
Before shipment, No. 1 pin of DSW5 is set at the “ON” side. If there are 2 or more units in the same
communication system, set No. 1 pin of DSW5 at the “OFF” side from the 2nd refrigerant group outdoor
unit. If only one outdoor unit is used, no setting is required.
Main Board
RSW1(System Address
Setting :Single Digit)
DSW7(Function Setting)
DSW6(Function Setting
DSW4(System Address
Setting :Double Digit)
DSW3(Model Setting0
DSW2(Function Setting)
DSW1(Test Run)
DSW5(End Terminal
Resistance Setting )
DSW5
Before Shipment Cancellation
Setting of End Terminal Resistance
ON
ON
OFF OFF