Field Setting; Field Setting Switches; Dip Switch Setting - Fujitsu AJ 040KCTAH Series Installation Manual

NOTES:
*1: The "external input priority mode" must be set by pressing push button on PC board
of outdoor unit. (Refer to "7. FIELD SETTING".)
*2: Batch stop or Emergency stop pattern can be selected by outdoor unit PC board
push button. (Refer to "7. FIELD SETTING".)
*3: The emergency stop function mounted in this model does not guarantee the regula-
tions of each country. For this reason, sufficient checking is necessary regarding
use.
Especially, since the fact that the equipment may not be emergency-stopped in the
case of breaking of the cables to the external input terminals and communication
line, communication error due to noise, VRF external input circuit trouble, etc. must
be considered, the provision of double measures that add direct interruption of the
power supply by switch, etc. is recommended as a precaution.
*4: Pulse input to CN135 must be width 50 ms or more, and must be interval 50 ms or
more.
6.6.4 External output terminal
You can detect the operation condition of outdoor unit and the abnormal situation of both
indoor and outdoor unit.
Wiring method and specifications
Error status
This output indicates the outdoor unit
and connected indoor unit's "Normal" or
"Error" status.
Operation status
This output indicates the outdoor unit's
"Operation" status.
P.C.B
CN136 (Black) or
CN137 (Blue)
(*7)
*5: Provide a DC 12 to 24 V power supply.
Select a power supply capacity with an ample surplus for the connected load.
*6: The allowable current is 30 mA or less.
Provide a load resistance such that the current becomes 30 mA or less.
*7: Polarity is [+] for pin 1 and [-] for pin 2. Connect correctly.
Do not impress a voltage exceeding 24 V across pins 1-2.
• A twisted pair cable (0.33 mm² (22AWG)) should be used.
Maximum length of cable is 150 m.
• Use an external input and output cable with appropriate external dimensions, depending
on the number of cables to be installed.
6.6.5 Base pan heater terminal
This is the output signal for base pan heater. Output signal on, when the outdoor tempera-
ture goes down below 2°C, and signal off at the outdoor temperature 4°C.
P.C.B.
Voltage:
CN115
power supply input voltage
(Black)
(*8)
Cable
(0.82 mm² (18AWG))
*8: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.
*9: The allowable current is 1 A or less.

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.
En-13
Output
Connector
voltage
Output1 0V Normal
CN136 DC 12-24 V Error
(*5)
(Black)
Output2 0V Stop
CN137 DC 12-24 V Operation
(Blue) (*5)
(*5)
DC power supply
(External) 12-24 V
Connected load (Operation Indica-
tor or Error Indicator)
Connected unit
Base pan heater (*9)
CAUTION

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. About PC board switches and indicators
for various settings, refer to "7.2. DIP switch setting".
7 Segment display
Rotary
switch
REF AD
×10
SET1
DIP switch
Status

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.
(*6)
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)
Configure the setting (DIP switch SET
5) of the terminal resistor of the outdoor
units as shown below from conditions (1)
and (2).
Figure: Terminal resistor setting
Outdoor unit
Z1/Z2
Outdoor unit
Z1/Z2
Outdoor unit
NS2 (Network
segment 2)
D306 D305 D304 D303
Push
LED105 LED104
button
MODE
/EXIT SELECT ENTER
×1
SW107 SW108 SW109
SET2 SET4
POWER ERROR
LED101 LED102
D300 D301
SW104
LED
lamp
SET5
DIP switch
SW111
DIP Switch
SET 1 1-4 Prohibited
SET 2 1-4 Prohibited
SET 4 1-4 Prohibited
1-3 Prohibited
SET 5
4
CAUTION
SET 5
4
Off
On
NS1 (Network segment 1)
(Set terminal resistor at outdoor units)
Terminal resistor: on
X1/X2
Refrigerant system 1
Terminal resistor: off
X1/X2
Refrigerant system 2
X1/X2
Refrigerant system 3
NS3 (Network segment 3)
Terminal resistor: on
Main PC board
Function
Terminal resistor setting
Terminal
Remarks
resistor
—
Disable
Enable (Factory setting)
Terminal resistor
setting
• Outdoor unit
: Set to on
: Set to off
• Signal amplifier
Resistor
installed
Resistor not
installed
X1/X2
NS4 (Network
segment 4)