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7. FIELD SETTING
Discharge the static electricity from your body before setting up the DIP switches.
Never touch the terminals or the patterns on the parts that are mounted on the PC
board.
7.1. Field setting switches
Remove the service panel of the outdoor unit and the cover of the electrical component
box to access the PC board of the outdoor unit.
PC board switches for various settings and LED displays are shown in the figure.
7.2. DIP switch setting
7.2.1 List of Settings
SET 5 must be set for the DIP switch.
Configure the settings before turning
on the power. Settings for SET 1, SET
2, SET 3 and SET 4 DIP switches are
factory default ones. Do not change
them.
Outdoor unit PC board
7.2.2 Terminating resistor setting
Be sure to set the terminal resistor according to specifications.
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 amplifier.
• When setting the terminal resistor of a signal amplifier, refer to the installation manual of
the signal amplifier.
• 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 seg-
ment: Total number of outdoor and indoor units and signal amplifiers is less than 64,
or the total length of the transmission cable is less than 500 m)
(3) How many outdoor units are connected to 1 refrigerant system?
Configure the setting (DIP switch SET 5)
of the terminal resistor of the outdoor units
as shown below from conditions (1) to (3).
Figure: Terminal resistor setting
NS1 (Network segment 1)
(Set terminal resistor at outdoor units)
Terminal resistor: on
Refrigerant system 1
Master unit
Terminal resistor: off
Refrigerant system 2
Master unit
Refrigerant system 3
Master unit
NS2 (Network
NS3 (Network segment 3)
segment 2)
Terminal resistor: on
CAUTION
DIP Switch
Function
SET 1
1-4 Prohibited
SET 2
1-4 Prohibited
SET 3
1-4 Prohibited
SET 4
1-4 Prohibited
1-3 Prohibited
SET 5
4
Terminal resistor setting
LED lamp
LED lamp
7-Segment
(green)
(red)
displays
POWER
ERROR
MODE
REF AD
× 1 0
× 1
MODE
SELECT ENTER
SET1
SET2
/NEXT
Rotary switches
Push buttons
DIP switches
SW111
DIP switch (SET 5)
CAUTION
SET 5
Terminal
Remarks
resistor
4
OFF
Disable
ON
Enable
(Factory setting)
About the setting of
terminal resistor
Outdoor unit
: On
: Off
Signal amplifier
Install
Do not
install
NS4 (Network
segment 4)
7.3. Rotary switch setting
The rotary switch (REF AD) sets the refrigerant circuit address of the outdoor unit. Config-
ure 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.
Rotary
Switch
Refrigerant
Setting
circuit
address
REF AD
×10
0
0
1
0
2
0
⁞
⁞
98
9
99
9
7.4. Push button setting
Various functions can be set. Set when necessary.
Perform settings after all indoor units have stopped operation.
Table. A: List of Settings
No
Pipe length set-
ting (*1)
00
Pipe length means the length between master outdoor unit and the nearest indoor
unit.
10
Prohibited (Factory default)
Cooling capacity
11
shift (*1)
Set this item when necessary.
Heating capacity
shift (*1)
12
Set this item when necessary.
13
Prohibited (Factory default)
14
Prohibited (Factory default)
Switching be-
tween batch stop
or emergency
stop (*1)
This mode selects the pattern of the stop function to be operated by the external
input terminal (CN134).
20
• 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.
Operation mode
—
selecting method
(*1)
21
Select the priority setting of the operation 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
Prohibited (Factory default)
23
Prohibited (Factory default)
High static pres-
24
sure mode
25
Prohibited (Factory default)
26
Prohibited (Factory default)
27
Prohibited (Factory default)
28
Prohibited (Factory default)
29
Prohibited (Factory default)
Setting
Setting
range
×1
Refrigerant
Setting
0
circuit
0–99
example
1
address
63
2
⁞
8
Rotary Switch (REF AD × 1): Factory setting "0"
Rotary Switch (REF AD × 10): Factory setting "0"
9
7-segment display
Setting Item
First 2
digits
Standard (40 to 65 m)
Short (less than 40 m)
Medium (65 to 90 m)
0
Long 1 (90 to 120 m)
Prohibited
1
Normal mode
Save energy mode
1
High power mode 1
High power mode 2
Prohibited
Normal mode
Save energy mode
1
High power mode 1
High power mode 2
1
1
Batch stop
2
Emergency stop
Priority given to the first com-
mand
Priority given to external
2
input of outdoor unit
Priority given to administra-
tive indoor unit
2
2
Standard
High static pressure 1
(equivalent to 072/090
2
model: 30 Pa, 108 model:
40 Pa, 126/144/162 model:
60 Pa)
2
2
2
2
2
Type of switch
REF AD
REF AD × 1
× 10
Factory
Last 2
default
digits
0
0
0
1
0
0
2
0
3
0
4
0
0
0
0
0
0
1
1
0
2
0
3
0
4
0
0
0
1
2
0
2
0
3
3
0
0
4
0
0
0
0
0
0
1
0
0
1
0
1
0
2
2
0
0
3
0
0
0
0
4
0
1
5
0
0
6
0
0
7
0
0
8
0
0
9
0
0
En-12
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