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User Guide | Optyma™ iCO2
6. External signal output
Part of operating states can be output from the controller of condensing unit.
1. Alarm signal
If the condensing unit stops under abnormal condition, an alarm signal is released.
2. Compressor operation signal
Signals of compressor operation and stop can be extracted.
- Extract signals via a relay.
Where the power for the relay contacts is taken from a terminal box, connect the wires as shown by the electric wiring in the next section.
List of external output
Name
CNS1(Green)
CNS2(Red)
External
CNS3(Brown)
input
CNG1(Blue)
CNG2(White)
CNH(Blue)
External
CNY(White)
output
CN N Z1, CNZ2
(Red) (Black)
(*) 0: Operation output 1: Error output 2: Compressor ON output 3: Fan ON output 4: Oil return operation output 5: High pressure control output
6: Compressor operation time (Maintenance time) time-over output
For the default output, see page 6
3. Signal cable connection procedures for connecting module controller
• Signal cables use DC 5 V. Never connect wires for 400 V. It trips the protective fuse on the PCB.
-Confirm that it is so arranged that 400 V power will not be applied to signal cables.
-Check the resistance of signal cable terminal board before turning power on . If the resistance is 100Ω, or less, a power cable may be connected to the
signal cable terminal board.
• Communication method is based on RS485.
• Connect signal cable to A, B on the terminal board.
• Signal cables has the polarity. Connect them as shown below.
Interface board
• Connect it to the terminal board using M3.5 crimp terminal as shown in the sketch below.
7 mm or less
• Use an adequate screwdriver to tighten terminal screws. If it is tightened too much, it could destroy screws. For the tightening torque of screw, see the
table below.
M3.5
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
Purpose (Factory default)
no use
ON-OFF SW
Compulsory oil return control input
Gas cooler fan snow control input
Multistep demand input
Operation output
Error output
Set with 7-segment (*)
Rotary switch setting (SW1:0, SW2:1) on interface board is "01"
from factory sipping. This is slave address number.
Set dip switch SW3-4 of interface board to ON.
Signal cable fixing band
-Fix the signal cable with care to protect the connection to the terminal board from external force.
-Give an adequate allowance to the signal cable before fixing.
Power cable/signal cable terminal board
Specifications
Stops when open.
Valid when short-circuited.
Non-voltage
contact
Valid when short-circuited.
(DC12V)
Valid when short-circuited
Valid when short-circuited.
-
12 VDC
-
output
(10 mA)
(Molex: Provide 5557-2R, 5556T at site.)
Tightening torque (N·m)
Point of caution
Use connectors fixed with
tapes on the outer wall of
the control box.
0.68 ~ 0.82
BC408445719305en-000101 | 45
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