Danfoss Optyma iCO2 Instructions Manual page 47

Instructions
The harnesses take out operation and error signals from CO2 refrigerating machine.
(The 4-point unit relay needs to be provided at site.)
CAUTION
• Have the harnesses installed by your dealer or specialized contractor.
• Electrical work must be made using dedicated circuit by qualified electricians.
• Source power supply to the CO2 refrigerating machine and external control panel must be turned off before starting work.
• Be sure to use the harnesses via the unit relay. Otherwise it could cause electric shock, or fire.
• Carefully read the installation manual of CO2 refrigerating machine, and observe the precautions.
External input harness (attached to the outside of control box) ... 3 pcs.
Blue ... Operation
output (CNH (Blue))
Black
Red
* Harness has connectors at both ends to prevent short-circuit by misconnection.
Installation procedure
1. Cut the harness at center to two pieces.
2. Attach a round terminal at end of each harness, and connect to the relay (provided at site)
3. Connect the connector to the CO2 refrigerating machine control PCB.
Circuit diagram
* External output is "Plus common DC 12 V output". Coil resistance of contact relay must be 750Ω or higher.
CO2 control PCB
External output
Operation output – CNH (Connector color: Blue)
Error output – CNY (Connector color: White)
7-segment setting output – CNZ1 (Connector color: Red)
7-segment setting output – CNZ2 (Connector color: Black)
<CNZ1, CNZ2 setting method>
External output
Code No.
Function assignment
CNZ1 P05
CNZ2 P06
· P05, P06 setting value
Setting
value
0 Operation output
1 Error output
2 Compressor ON output
3 Fan ON output
4 Oil return operation output
© Danfoss | Climate Solutions | 2023.02 | LCA012A024
External Output Harness – Installation Manual
White ... Error output
(CNY (White))
+ 12V
CHN blue
1
2
CNY White
1
2
CNZ1 Red
1
2
CNZ2 Black
1
2
Fig. 39
Default setting value
0
1
Function
Red ... CNZ1 (Red)
Red
1
Black
2
Red
1
Black
2
Red
1
Black
2
Red
1
Black
2
Setting
value
5 High pressure control output
6 Compressor operation time (Maintenance time) time-over output
7 Spare (Spare setting to be same as default setting.)
8 Spare (Spare setting to be same as default setting.)
9 Spare (Spare setting to be same as default setting.)
Black ... CNZ2 (Black)
Black
Red
MOLEX 5557
+
5 9
13
1
-
+
6 10
14
2
-
+
7 11
3 15
-
+
6 12
16
4
-
<4-point relay (Provided at site)>
(Recommended) Omron G5D-F4E
Coil resistance 750Ω or more
Function
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