En-17
X 10
X 1
7 Segment
LED indicator
Push button
LED lamp
POWER
LED105 LED104
REF AD
SET 1
SW101
SET 2
SW102
SET 3
SW103
SET 4
SW104
ERROR
MODE
LED101
(GREEN)
MODE
/EXIT
SELECT ENTER
SW106
SW107
SW108
SW109
SW105
LED102
(RED)
Rotary switch
Outdoor unit PC board
DIP switch
SET5
7. 2. 2. Settings to be con
fi
gured locally
(1) Outdoor
unit
address
setting
When 2 or 3 outdoor units are installed to 1 refrigerant system, set the address for
each outdoor unit.
Set the address for all outdoor units.
SET3
Outdoor unit address
Remarks
1
2
OFF
OFF
0
Master unit (Factory setting)
OFF
ON
1
Slave unit 1
ON
OFF
2
Slave unit 2
ON
ON
-
Forbidden
(2) Number of slave units setting for outdoor unit
Set the number of slave units connected to 1 refrigerant system.
Set only the master unit.
SET3
Number of connectable
outdoor units
Remarks
3
4
OFF
OFF
0
Master unit only (Factory setting)
OFF
ON
1
1 slave unit connected
ON
OFF
2
2 slave unit connected
ON
ON
-
Forbidden
(3) Number of outdoor units installed
The number of outdoor units installed in 1 refrigerant system must be set.
Set for all outdoor units.
SET5
Number of outdoor units
Remarks
1
2
OFF
OFF
1
(Factory setting)
OFF
ON
2
-
ON
OFF
3
-
ON
ON
-
Forbidden
7. 2. 3. Terminal resistor setting
CAUTION
Be sure to set the terminal resistor according to speci
fi
cations.
Set the terminal resistor for every network segment (NS).
If terminal resistor is set in multiple devices, the overall communication system
may be damaged.
If terminal resistor is not set in a device, abnormal communication may occur.
• Be sure to set 1 terminal resistor in a network segment. You can set the terminal
resistor at the outdoor unit or signal ampli
fi
er.
• When setting the terminal resistor of a signal ampli
fi
er, refer to the installation
manual of the signal ampli
fi
er.
• When setting multiple terminal resistors, take note of the following items.
1
How many network segments are there in a VRF system?
2
Where will you set the terminal resistors in a network segment? (Condition for 1
segment: Total number of outdoor and indoor units and signal ampli
fi
ers is less
than 64, or the total length of the transmission cable is less than 500m)
3
How many outdoor units are connected to 1 refrigerant system?
Con
fi
gure the setting (DIP switch SET5) of the terminal resistor of the outdoor units as
shown below from conditions
1
to
3
.
SET5
Terminal resistor
Remarks
4
OFF
Disable
(Factory setting)
ON
Enable
-
Figure: Terminal resistor setting
NS2 (Network segment 2)
NS3 (Network segment 3)
NS4 (Network
segment 4)
NS1 (Network segment 1)
(Set terminal resistor at outdoor units)
Master unit
Master unit
Master unit
Refrigerant system1
Refrigerant system2
Refrigerant system3
Terminal resistor: off
Terminal resistor: on
Terminal resister: on
About the setting of terminal resistor
Outdoor unit (Master unit)
Install
Do not install
:on
:off
Signal ampli
fi
er
7. 3. Rotary switch setting
The rotary switch (REF AD) sets the refrigerant circuit address of the outdoor unit.
Con
fi
gure the settings only on the master unit of a refrigerant system.
If multiple refrigerant systems are connected, set the rotary switch (REF AD) as
shown in the table below.
Refrigerant circuit address
Rotary Switch Setting
REF AD
×10
×1
0
0
0
1
0
1
2
0
2
3
0
3
4
0
4
•
•
•
•
•
•
97
9
7
98
9
8
99
9
9
Setting
Setting range
Type of switch
Refrigerant circuit
address
0–99
Setting
example
63
REF AD × 10
REF AD × 1
Rotary Switch (REF AD×1): Factory setting "0"
Rotary Switch (REF AD×10): Factory setting "0"
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2014/11/10 19:39:57
2014/11/10 19:39:57
