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CU-2S18NBU-1 service manual Refrigeration Cycle Diagram
Models:
CU-2S18NBU-1
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43 pages
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Troubleshooting
Specifications
Operation Characteristics
Install
Parts list
Refrigeration Cycle Diagram
Dimension
10.3.1Connecting the Piping to Outdoor Unit
Disassembly and Assembly Instructions
Time Delay Safety Control Restart Control
Page 8
Image 8
4. Refrigeration Cycle Diagram
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Page 9
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Image 8
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Contents
TABLE OF CONTENTS
Outdoor Unit CU-2S18NBU-1
8.1 Main Printed Circuit Board
8.2 Noise Filter Printed Circuit Board
15. Disassembly and Assembly Instructions
17. Exploded View and Replacement Parts List..41
1. Safety Precautions
Power supply connection to the air conditioner
2. Specification
Model
Outdoor Unit
CU-2S18NBU-1
Multi split combination possibility
3. Dimensions
4. Refrigeration Cycle Diagram
5. Block Diagram
6. Wiring Connection Diagram
7. Electronic Circuit Diagram
8. Printed Circuit Board
8.1Main Printed Circuit Board
8.2Noise Filter Printed Circuit Board
QUICK GUIDE
9. Installation Information
9.1Check Points
10. Installation Instruction
10.1 SELECT THE BEST LOCATION
Outdoor Unit Installation Guidelines
10.2 INSTALL THE OUTDOOR UNIT
10.3 CONNECT THE PIPING
10.3.1Connecting the Piping to Outdoor Unit
10.3.2Gas Leak Checking
10.4 EVACUATION OF THE EQUIPMENT
10.5 CONNECT THE CABLE TO THE OUTDOOR UNIT
10.6 HEAT INSULATION
Cutting and Flaring the Piping
11. Operation Control
11.1 Cooling Operation
12.2Dew Prevention control Cool
12. Protection Control
12.1Freeze Prevention control Cool
12.6 Time Delay Safety Control Restart Control
12.9 IPM power transistor Protection Control
12.5 Cooling overload control Cool
12.7 30 seconds Force Operation
12.12 Valve close detection control
13.3 Wiring Error Check
13. Servicing Mode
13.1 Pump Down Operation
13.2 Test Operation
13.4Power Save Mode
13.5 Mode priority function
14. Troubleshooting Guide
14.1 Self Diagnosis Function
Illuminate ----------Flashing
Blank ----------OFF
Diagnosis
Abnormality
15. Disassembly and Assembly Instructions
15.1 Outdoor Unit Removal Procedure
15.1.3Removing the Control P.C. Board
15.1.4Removing the Propeller Fan and Fan Motor
3.Disconnect the fan motor connector from the control P.C. Board
16. Technical Data
16.1 Operation Characteristics
Piping Length Characteristic
Room temperature
oOutdoor temperature 95F DBT
81F DBT, 66F WBT
16.1.2CS-S9NKUW-1x2 CU-2S18NBU-1
Piping Length Characteristic
Room temperature
oOutdoor temperature 95F DBT
81F DBT, 66F WBT
16.1.3CS-S12NKUW-1 CU-2S18NBU-1
Piping Length Characteristic
Room temperature
oOutdoor temperature 95F DBT
81F DBT, 66F WBT
16.1.4CS-S12NKUW-1x2 CU-2S18NBU-1
Piping Length Characteristic
Room temperature
oOutdoor temperature 95F DBT
81F DBT, 66F WBT
16.1.5CS-S12NKUW-1+CS-S9NKUW-1 CU-2S18NBU-1
Piping Length Characteristic
Room temperature
oOutdoor temperature 95F DBT
81F DBT, 66F WBT
17. Exploded View and Replacement Parts List
REF. NO
DESCRIPTION & NAME
CU-2S18NBU-1
REMARK
REF. NO
DESCRIPTION & NAME
CU-2S18NBU-1
REMARK
