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CU-2E18NBU service manual 8.1Main Printed Circuit Board
Models:
CU-2E18NBU
1
13
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57 pages
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Troubleshooting
Specs
Operation Characteristics
Install
Refrigeration Cycle Diagram
Dimension
14.1.3Wiring Error check
Safety Precautions
11.2.2Powerful Operation
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Image 13
8. Printed Circuit Board
8.1
Main Printed Circuit Board
13
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Image 13
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Contents
Outdoor Unit CU-2E18NBU
TABLE OF CONTENTS
18. Exploded View and Replacement Parts
16. Disassembly and Assembly Instructions
List
1. Safety Precautions
7.Power supply connection to the air conditioner
2.1CU-2E18NBU
2. Specifications
Unit
OUTDOOR UNIT
Unit
šMulti split combination possibility
OUTDOOR UNIT
Indoor unit combination
3. Dimensions
4. Refrigeration Cycle Diagram
5. Block Diagram
6. Wiring Connection Diagram
7. Electronic Circuit Diagram
8.1Main Printed Circuit Board
8. Printed Circuit Board
8.3Display Printed Circuit Board
8.2Noise Filter Printed Circuit Board
9.1Check Points
9. Installation Information
68.6 - 65.6 ft x 0.2 oz/ft = 0.6 oz
10.1 Select The Best Location
10. Installation Instruction
10.3 Connect the Piping
10.2 Install The Outdoor Unit
Outdoor Unit Installation Guidelines
Gas Leak Checking
CUTTING AND FLARING THE PIPING
10.4 Evacuation of the Equipment
10.6 Heat Insulation
10.5 Connect The Cable To The Outdoor Unit
11.1 Cooling Operation
11. Operation Control
11.2.2Powerful Operation
11.2 Heating Operation
11.2.3Powerful Operation
11.2.1Outdoor fan control
12.Simultaneous Operation Control
13.1 Freeze Prevention control Cool
13. Protection Control
13.2 Dew Prevention control Cool
13.6 Heating overload control Heat
13.5 Cooling overload control Cool
13.12 IPM power transistor Protection Control
13.9 Time Delay Safety Control Restart Control
13.8 Deice Control
13.10 30 seconds Force Operation
13.15 Valve close detection control
14.1 CU-2E18NBU
14. Servicing Mode
14.1.4Power Save Mode
14.1.3Wiring Error check
14.1.5Mode priority function
14.1.6Cooling only function
15.1 Self Diagnosis Function
15. Troubleshooting Guide
Page
Page
16.1 Outdoor Unit Removal Procedure
16. Disassembly and Assembly Instructions
16.1.4Removing the Propeller Fan and Fan Motor
16.1.3Removing the Control P.C. Board
Page
17.1 Operation Characteristics
17. Technical Data
šCooling Characteristic
Compressor Freq Fc
šCooling Characteristic
šPiping Length Characteristic Cooling
Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq Fc
šPiping Length Characteristic Cooling
šHeating Characteristic
Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq Fh
šHeating Characteristic
šPiping Length Characteristic Heating
Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq Fh
šPiping Length Characteristic Heating
17.1.2Two Indoor Unit Operation
šCooling Characteristic
Compressor Freq Fc
Compressor Freq Fc
šCooling Characteristic
Compressor Freq Fc
šCooling Characteristic
Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq Fc
šPiping Length Characteristic Cooling
Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq Fc
šPiping Length Characteristic Cooling
Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq Fc
šPiping Length Characteristic Cooling
Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq Fh
šHeating Characteristic
Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq Fh
šHeating Characteristic
Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq Fh
šHeating Characteristic
Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq Fh
šPiping Length Characteristic Heating
Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq Fh
šPiping Length Characteristic Heating
Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq Fh
šPiping Length Characteristic Heating
18. Exploded View and Replacement Parts List
DESCRIPTION & NAME
REF. NO
Q’TY
CU-2E18NBU
