En-10
7.3.4. Work procedure
(1)
(1)
(1)
Remove the control box cover.
(2) Connect the transmission cable to
the transmission cable terminal.
(3) Firmly attach the transmission
cables using the accessory cable
tie. (in 2 places)
(4) Attach the conduit connector on
the wiring connecting port.
(5) Connect the power supply cable to
the power supply cable terminal.
(6) Fill the cable holes with putty in
order to prevent small animals
from entering.
(7) Install the Control box cover.
(5)
To indoor unit
(cooling / heating)
Transmission
cable
To indoor unit
Lock nut
Conduit connector
Power supply
terminal
Earth
(Ground)
(4) Conduit connector
(L1, L2 (N):
Power supply cable)
Lock nut
Wiring connecting port
To outdoor unit /
other RB unit
To outdoor unit / other
RB unit / indoor unit
(Cooling only)
Transmission calbe
(2)
(3)
(6)
• Fix the conduit with the supporters as shown below.
Conduit (Power supply cable)
Supporter
RB unit
30 in
(756 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
8. FIELD SETTING
CAUTION
Use an insulated screwdriver to set the dip switches.
8.1. PC board layout
• Before turning ON the power supply, set the switches. (The switch settings will be dis-
abled after the power supply has been turned ON.)
PC board
DIP switch
SET1
DIP switch SET1
(setting disabled)
Rotary switch
External Input
connector
Error indicator
lamp (Red)
Power indicator
lamp (Green)
CNA01
CNA02
DIP switch SET2
Rotary switch
DIP switch
SET2
8.2. Address setting
(1) RB unit address
When connecting multiple RB units to 1 refrigerant system, set the address at RB
AD SW.
Rotary switch (RB AD × 1)...Factory setting “0”
Rotary switch (RB AD × 10)...Factory setting “0”
(2) Refrigerant circuit address
In the case of multiple refrigerant systems, set REF AD SW
for each refrigerant system. Set to the same refrigerant circuit address as the
outdoor unit.
Rotary switch (REF AD × 1)...Factory setting “0”
Rotary switch (REF AD × 10)...Factory setting “0”
Setting
Type of switch
Setting range
RB unit address
Manual address setting
Setting
example
“2”
RB AD × 10
RB AD × 1
Automatic address setting*
Set this switch to 00 at factory setting.
0 to 63
Refrigerant
circuit address
Manual address setting
Setting
example
“63”
REF AD × 10
REF AD × 1
Automatic address setting*
Set this switch to 00 at factory setting.
0 to 99
* For details of automatic address setting, please refer to the outdoor unit installation
manual.
8.3. Function setting
Set the DIP switch SET2, referring to the table.
(1) Operation mode selecting switch
SET 2
Operation mode
Remarks
1
2
OFF
OFF
Priority given to the
fi
rst command
Factory setting
ON
OFF
Priority given to external input of RB
unit
OFF
ON
Priority given to administrative
indoor unit
ON
ON
Setting forbidden
(2) Cool/heat selection control time
SET 2
Cool/heat selection control time
Remarks
3
4
OFF
OFF
6 min
Factory setting
ON
OFF
3 min
OFF
ON
Setting forbidden
ON
ON
Setting forbidden
• If the cool/heat selection control time is short, the sound of passing refrigerant may
be loud during the cool/heat selection control process.
• Settings other than those in specified positions are not to be changed.
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