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Instructions
46 | AN405821998738en-000102 - 118A5495A
© Danfoss | Climate Solutions | 2023.02 | LCA012A024
External Input Harness Installation Manual
The harnesses are used to control the operation of CO2 refrigerating machine from external control panel (device).
(The “a” contact 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.
• 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.
Installation procedure
Specifications of external input
Brown … For compulsory
oil return control input
(CNS3)
* Harnesses for external operation input (CNS1) and demand input (CNS2) are fixed in the control box with tapes.
1. Cut the harness, and attach a round terminal (provided at site) at the end, and connect to the relay.
*External input is input in the non-voltage contact (open or short-circuited). The relay is not necessary if the non-voltage contact output of control panel
can be used.
2. Connect the connector to the control PCB of CO2 refrigerating machine.
Default functions of external inputs are as shown at right.
*Inputs use non-voltage contacts.
Functions can be changed from the default settings using the 7-segment display as follows.
* Setting values on the 7-segment display correspond to respective functions as shown at right
[Procedure to change external input function]
1. Using SW8, SW9, change the 7-segment display to the display (POO) of
external input to be changed.
2. Hold down SW7 for 3 seconds to flicker the display, and change the
setting value for function to be changed with SW8, SW9.
3. Hold down SW7 for 3 seconds to light the display.
This is all for the change of external input functions.
JST XAP-02V-1
Blue … For gas cooler
fan snow control input
(CNG1)
White … For multistage
demand input (CNG2)
External input
Default setting: Function
7-segment: Setting value
CNS3 (Brown)
4: Compulsory oil return control input
P08 : 0 ~ 20
CNG1 (Blue)
5: Gas cooler fan snow control input
P09 : 0 ~ 20
CNG2 (White)
9: Multistage demand input
P10 : 0 ~ 20
Setting value Function
Open
Short-circuit
0
External operation input
Stop
Valid
1
Demand input
Valid
Valid
2
Quiet mode input
Invalid
Valid
4
Compulsory oil return input
Ordinary
Valid
5
Gas cooler fan snow control input
Ordinary
Valid
9
Multistage demand input
Invalid
Valid
*1 Demand input: P04
*2 Demand rate setting for multistage demand input: 0%, 40%, 60%, 80% PF22: OFF
→
000
→
040
→
060
→
080, P14, P15
Содержание Optyma iCO2
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