Dip Switch Setting - Hitachi PSC-6RAD Installation Manual

4.

DIP SWITCH SETTING

1) Dip Switch setting should be performed
with the power of room air-conditioner
OFF. The setting contents are invalid if it
is performed with the power ON.
2) Installation position of Dip Switch is as
below.
(Refrigerant cycle No. setting)
(Unit No. setting)
(H-LINK
transmission)
(Sub setting)
CAUTION:
Do not turn ON various pins of DSW1
and DSW2.
3) Refrigerant cycle No. is set by RSW1 and
DSW1.
Refrigerant Cycle No. Setting
RSW1 (one digit)
DSW1 (ten digit)
position
DSW1 and RSW1 are set 0 before shipment.
Up to 15 systems can be set.
4) Unit No. is set by RSW2 and DSW2.
Unit No. Setting
RSW 2 (one digit)
DSW2 (ten digit)
Set it inserting a
position
screw driver.
DSW2 and RSW2 are set 0 before shipment.
Up to 15 systems can be set.
PCB
(Refrigerant cycle No.
setting)
(Unit No. setting)
(Fuse recovery,
terminal resistance
setting)
Ex) Setting in 15 system
Set it inserting
a screw driver.
The position is
No. 1 pin is OFF
Set 5.
Ex) Setting in 15 system
The position is
No. 1 pin is OFF
Set 5.
DIP SWITCH SETTING
5) Sub Setting
In case of setting various RAC adapters in
the same refrigerant cycle, set the RAC
adapter with smallest Unit No. as a main.
In case of only one RAC adapter in a
refrigerant system, this adapter should be
a main. Set by changing DSW3.
− Main Setting −
Setting before
shipping (Sub setting)
Main Setting
Setting before shipping (Sub setting)
CAUTION:
Do not set various main adapters in the
same refrigerant cycle.
6) In case of wrongly applying high voltage to
H-LINK wiring, fuse installed in a
transmission circuit on PCB is cut. In this
case, after wiring correctly, turn ON No.2
pin of DSW4 on PCB and then
transmission circuit is recovered. (If you
make this error again, the transmission
circuit is not recovered.)
PCB
Turn ON No. 2 pin of
DSW4
5