En-23
8.3. Rotary switch setting
The rotary switch (REF AD) sets the refrigerant system address of the outdoor unit. Con-
figure the settings only on the primary unit of a refrigerant system.
If multiple refrigerant systems are connected, set the rotary switch (REF AD) as shown in
the table below.
Refrigerant
system
address
Rotary
Switch
Setting
REF AD
×10 ×1
000
101
202
⁞⁞⁞
98 9 8
99 9 9
Setting
Setting
range
Type of switch
Refrigerant
system
address
0 to 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”
8.4. Push button setting
Various functions can be set when necessary.
Perform settings after all indoor units have stopped operation.
8.4.1 List of settings
NOTE:
Code numbers not listed in the table blow are not available in this product. Do not set
the unsupported code numbers.
No Setting Item
7-segment display
Factory
default
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 95 m)
02
Long 1 (295 to 394 ft)
(95 to 120 m)
03
Long 2 (394 to 541 ft)
(120 to 165 m)
04
Prohibited 0 5
Pipe length means the length between primary outdoor unit and the nearest
indoor unit.
10
Sequential start
shift (*1)
Normal
10
00
21 seconds delay 0 1
42 seconds delay 0 2
63 seconds 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
Prohibited 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
Prohibited (Factory default) 1300
14
Prohibited (Factory default) 1400
15
Prohibited (Factory default) 1500
17
Height difference
between indoor
units (*1)
Standard
17
00
Prohibited 0 1
Height difference 0 2
Prohibited 0 3
Prohibited 0 4
This setting is for heat recovery system only. If installing the indoor units (even
only one set) to a lower floor than the outdoor unit, and the height difference
between the indoor units is 10 ft (3 m) or greater (i.e., if installing the indoor units
on separate floors), set “02 (height difference)”.
19
Prohibited (Factory default) 1900
20
Switching be-
tween 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 external
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 conditioner
does not return to the original operation until the indoor unit is turned on by the
remote controller.
21
Operation mode
selecting method
(*1)
Priority given to the first
command
21
00
Priority given to external
input of outdoor unit
01
Priority given to administra-
tive indoor unit
02
This setting is for heat pump system only. Select the priority setting of the opera-
tion mode.
• Priority given to the first command: Priority is given to the operation mode which
is set first.
• Priority given to external input of outdoor unit: Priority is given to the operation
mode which is set by the external input terminal (CN132).
• Priority given to administrative indoor unit: Priority is given to the operation mode
of the administrative indoor unit which is set by the wired remote controller.
22
Snow falling
protection fan
mode (*1)
Enable
22
00
Disable 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 pres-
sure mode
Standard
24
00
High static pressure 1
(equivalent to 0.12 in WG
(30 Pa))
01
High static pressure 2
(equivalent to 0.32 in WG
(80 Pa))
02
High static pressure 3
(equivalent to 0.44 in WG
(110 Pa))
03
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.
* Model AOUA72/96/120 cannot enable “High static pressure 3”. Even if it is set,
it will be the same as “High static pressure 2”.
25
Prohibited (Factory default) 2 5 0 0
26
Prohibited (Factory default) 2 6 0 0
27
Prohibited (Factory default) 2 7 0 0
28
Change of unit
(Temperature)
Celsius (°C)
28
00
Fahrenheit (°F) 0 1
29
Change of unit
(Pressure)
Mpa
29
00
psi 0 1
30
Energy saving
level setting (*1)
Level 1 (stop)
30
00
Level 2
(operated at 40% capacity)
01
Level 3
(operated at 60% capacity)
02
Level 4
(operated at 80% capacity)
03
Level 5
(operated at 100% capacity)
04
The capacity limit can be selected by the external input terminal (CN133) when
operating with the “Energy Saving Peak Cut function”.
The lower the level, the more the effect of energy saving, but the cooling/heating
performance will also drop.
32
Prohibited (Factory default) 3 2 0 0
33
Prohibited (Factory default) 3 3 0 0
35
Presence of
heater selection
control using
outdoor tempera-
ture (*1)
Invalid
35
00
Valid 0 1
If “Heater selection control 1 or 2 using outdoor temperature” is used for any of
the indoor units of the refrigerant system, select "Valid". For more details on set-
tings for this item, see the Design & Technical manual.
36
Outdoor tem-
perature zone
boundary tem-
perature A (*1)
-4.0°F (-20°C)
36
00
-0.4°F (-18°C) 0 1
3.2°F (-16°C) 0 2
6.8°F (-14°C) 0 3
10.4°F (-12°C) 0 4
14.0°F (-10°C) 0 5
17.6°F (-8°C) 0 6
21.2°F (-6°C) 0 7
24.8°F (-4°C) 0 8
For more details on settings for this item, see the Design & Technical manual.
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