En-19
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 resistor: on
About the setting of terminal resistor
Outdoor unit (Master unit)
Install
Do not install
:on
:off
Signal amplifi er
7. 3. Rotary switch setting
The rotary switch (REF AD) sets the refrigerant circuit address of the outdoor unit.
Confi 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
000
101
202
303
404
•••
•••
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"
7. 4. Push button setting
Various functions can be set when necessary.
Perform settings after all indoor units have stopped operation.
Table. A: List of Settings
No Setting Item
7 segment LED indicator
Factory
setting
First 2
digits
Last 2 digits
00
Pipe length set-
ting *1
Standard (131 to 213 ft)
(40 to 65 m)
00
00
Short (less than 131 ft)
(less than 40 m)
01
Medium (213 to 295 ft)
(65 to 90 m)
02
Long 1 (295 to 394 ft)
(90 to 120 m)
03
Long 2 (394 to 492 ft)
(120 to 150 m)
04
Pipe length means the length between master outdoor unit and the nearest
indoor unit.
10
Sequential start
shift *1
Normal
10
00
21 sec. Delay 0 1
42 sec. Delay 0 2
63 sec. Delay 0 3
The start-up timing of outdoor unit (compressor) can be set up so that it can
delay several seconds.
This feature is useful when multiple number of outdoor units are installed and
turned on at the same time to limit the starting current.
11
Cooling capacity
shift *1
Normal mode
11
00
Save energy mode 0 1
High power mode 1 0 2
High power mode 2 0 3
(Forbidden) 0 4
Set this item when necessary.
12
Heating capacity
shift *1
Normal mode
12
00
Save energy mode 0 1
High power mode 1 0 2
High power mode 2 0 3
Set this item when necessary.
13
(Forbidden) 1 3 0 0
14
(Forbidden) 1 4 0 0
15
(Forbidden) 1 5 0 0
20
Switching between
batch stop or
emergency stop
*1
Batch stop
20
00
Emergency stop 0 1
This mode selects the pattern of the stop function to be operated by the exter-
nal input terminal (CN134).
• Batch stop: The stop of all indoor units connected to same refrigerant system
due to input signal coming from CN134.
• Emergency stop: When emergency stop is actuated, the indoor unit does not
accept the operation command from the remote controller. On the other hand,
when the emergency stop is released (no input from CN134), the air condi-
tioner does not return to the original operation until the indoor unit is turned on
by the remote controller.
22
Snow falling
protection fan
mode *1
Valid
22
00
Invalid 0 1
This mode operates the fans of outdoor units in order to prevent the units from stop-
ping operation when they are covered by snow.
23
Interval setting
for snow falling
protection fan
mode *1
Standard (30 minutes)
23
00
Short 1 (5 minutes) 0 1
Short 2 (10 minutes) 0 2
Short 3 (20 minutes) 0 3
When the snow falling protection fan mode is set, the operation interval of the fans
of outdoor units can be selected.
24
High static pressure
mode
Standard
24
00
High static pressure 1
(equivalent to 0.12in WG
(30Pa))
01
High static pressure 2
(equivalent to 0.32in WG
(80Pa))
02
(Forbidden) 0 3
When installing a duct to the blow-off outlet of an outdoor unit, set the high static
pressure mode according to the static pressure of the duct to be installed.
Furthermore, use this setting if the air blow of an outdoor unit is poor, such as when
installed in a place with a low ceiling.
25
(Forbidden) 2 5 0 0
26
(Forbidden) 2 6 0 0
27
(Forbidden) 2 7 0 0
9378945159-04_IM.indb 199378945159-04_IM.indb 19 2015/12/1 10:50:572015/12/1 10:50:57
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