Rotary Switch Setting - Fujitsu AIRSTAGE AJH072LNLAH Installation Manual

Outdoor unit PC board
7. 2. 2. Settings to be configured 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
1 2
OFF OFF 0
OFF ON 1
ON OFF 2
ON ON -
(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
3 4
OFF OFF 0
OFF ON 1
ON OFF 2
ON ON -
(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
1 2
OFF OFF
OFF ON
ON OFF
ON ON
7. 2. 3. Terminal 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
segment: 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 500m)
③ How many outdoor units are connected to 1 refrigerant system?
7 Segment
LED lamp
LED indicator
POWER
Rotary switch
ERROR
MODE
LED101 LED102
(GREEN) (RED)
REF AD
LED105 LED104
SW105
SW106
X 10 X 1
MODE SET 1 SET 2 SET 3 SET 4
SELECT ENTER
/EXIT
SW101
SW102 SW103 SW104
SW107 SW108 SW109
Push button DIP switch
SET5
Remarks
Master unit (Factory setting)
Slave unit 1
Slave unit 2
Forbidden
Remarks
Master unit only (Factory setting)
1 slave unit connected
2 slave unit connected
Forbidden
Remarks
1 (Factory setting)
2 -
3 -
- Forbidden
Caution
Configure the setting (DIP switch SET5) of the terminal resistor of the outdoor units as
shown below from conditions 1 to 3.
SET5
Terminal resistor
4
OFF
ON
Figure: Terminal resistor setting
NS1 (Network segment 1)
(Set terminal resistor at outdoor units)
Terminal resistor: on
Refrigerant system1
Master unit
Terminal resistor: off
Refrigerant system2
Master unit
Refrigerant system3
Master unit
NS2 (Network segment 2) NS3 (Network segment 3)
Terminal resister: on
About the setting of terminal resistor
Outdoor unit (Master unit)
:on
:off
Signal amplifier
Install
Do not install
7. 3. Rotary switch setting
The rotary switch (REF AD) sets the refrigerant circuit address of the outdoor unit.
Configure 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
0
1
2
3
4
・
・
97
98
99
Setting Setting range
Refrigerant circuit
0–99
address
Rotary Switch (REF AD×1): Factory setting "0"
Rotary Switch (REF AD×10): Factory setting "0"
Remarks
Disable (Factory setting)
Enable -
NS4 (Network
segment 4)
Rotary Switch Setting
REF AD
×10
0
0
0
0
0
・
・
9
9
9
Type of switch
Setting
example
63
REF AD × 10 REF AD × 1
×1
0
1
2
3
4
・
・
7
8
9
En-16