Hitachi RPI-1.0FSN4E - Page 78

A
Main outdoor unit
A1
Secondary outdoor unit
B
Operation wiring (shielded twisted pair cable or shielded pair
cable) 5 V DC non-polar H-LINK (eld-supplied)
C
Distribution box (eld-supplied)
D
Indoor units
E
Remote control wire (shielded twisted pair cable or shielded pair
cable) (eld-supplied)
F
Fuse or CB(eld-supplied)
G
Remote control
H
Indoor unit system number 0
I
Indoor unit system nubmer 1
J
Transmission wire between A and A1
K
CH unit
CB
Circuit breaker (eld-supplied)
ELB
Earth Leakage Breaker (eld-supplied)

Connection diagram: heat pump system
A1
B
TB1
3N
400V/50Hz
1N
220-240V/50Hz
230V/50Hz
3N
400V/50Hz
TB1TB2
L1 L2 L3 N1234
TB2
1234
TB1
L1 L2 L3 N
12AB
TB2
12AB
TB2
TB1
L1 L2 NL1L2N
ELB
ELB
ELB
CC
D
D
EE
F
F
F
G G
HI
CB
CB
CB
ELB
ELB
ELB
J
Location of the DSW switches on PCB1.
SEG2
DSW6
DSW5
PSW3
SEG1
DSW4
DSW3DSW2
PSW2
PSW1
DSW7
DSW10
PSW4
PSW5
DSW1
RSW1
< PCB1 >
CAUTION
Before changing the settings of the DIP switches, the voltage
supply should be disconnected. Otherwise, the new settings will
not be valid.
NOTE
• Only the DIP DSW1, DSW2 and DSW4 switches can be set
while the voltage supply is connected.
• The symbol “■” indicates the position of the DIP switches. The
gures show the position of the DIP switch once the position
setting has been completed.
• With the DSW4 switch, the unit starts or stops after
10 to 20 sec. of the switch being enabled.
• Record the number of the outdoor unit to tell it apart from oth-
ers during service and maintenance operations in this area:
PSW1
PSW2
PSW3PSW5
PSW4
PSW buttons on PCB1
PSW1: accept.
PSW2, 3, 4 and 5: for checking.
DSW1, RSW1: refrigerant cycle number setting
Setting required
Setting before RSW1 supply: 0
Setting before DSW1 supply: 0 (digit of tens)
Set each main outdoor unit number on each
refrigerant cycle (Subs-units setting are not
required)
Outdoor and indoor units belonging to the
same refrigerant cycle: setting the same
cycle number in the outdoor and indoor units
(indoor units: DSW5 and RSW2)
10.5 SETTING OF THE DSW SWITCHES ON PCB1
64
PMML0294A rev.2 - 07/2014
Electrical wiring
PMML0294A_rev.2_02-2014.indb 64 14/07/2014 12:28:36