Hitachi UTOPIA RAS-4 Series - Page 111

10 Electrical wiring
DIP and RSW switches settings
TCGB0136 rev.1 - 05/2021
103
10

DSW2: Optional function setting
Pipe length setting should be performed
as follows according to the on-site pipe
length.
Setting before
shipment
Pipe length (≤5m)
Pipe length (≥30m)
Control to support existing pipes or
when using Ø19,05 gas pipe (soft-
annealed), switch ON DSW2 pin 4 in
the outdoor unit PCB
Optional function setting mode
(The optional function selection mode
becomes available)
External input/output setting mode
(The input / output signals selection
mode becomes avaliable).

DSW3: Capacity Setting (No setting is required)
Factory setting
RAS-4HV(R/N)(C/P)2E RAS-5HV(R/N)(C/P)2E RAS-6HV(R/N)(C/P)2E
RAS-4H(R/H)(C/P)2E RAS-5H(R/N)(C/P)2E RAS-6H(R/N)(C/P)2E

DSW4 / RSW1: Refrigerant cycle number setting (Setting is required)
Setting for the tens digit
Setting position
Set by inserting slotted screwdriver into the
groove (setting for the last digit)
0
9
8
7
6
5
4
3
2
1