Table Of Contents - Panasonic CU-4E23QBR Service Manual

TABLE OF CONTENTS

1. Safety Precautions .............................................3
2. Specifications .....................................................5
2.1 CU-4E23QBR ...............................................5
2.2 CU-4E27QBR ...............................................7
2.3 CU-5E34QBR ...............................................9
3. Dimensions .......................................................21
3.1 CU-4E23QBR .............................................21
3.2 CU-4E27QBR CU-5E34QBR ....................21
4. Refrigeration Cycle Diagram ...........................22
4.1 CU-4E23QBR .............................................22
4.2 CU-4E27QBR .............................................23
4.3 CU-5E34QBR .............................................24
5. Block Diagram ..................................................25
5.1 CU-4E23QBR .............................................25
5.2 CU-4E27QBR .............................................26
5.3 CU-5E34QBR .............................................27
6. Wiring Connection Diagram ............................28
6.1 CU-4E23QBR .............................................28
6.2 CU-4E27QBR .............................................29
6.3 CU-5E34QBR .............................................30
7. Electronic Circuit Diagram ..............................31
7.1 CU-4E23QBR .............................................31
7.2 CU-4E27QBR .............................................32
7.3 CU-5E34QBR .............................................33
8. Printed Circuit Board .......................................34
8.1 Main Printed Circuit Board .........................34
8.2 Noise Filter Printed Circuit Board ...............36
8.3 Display Printed Circuit Board .....................37
9. Installation Information....................................38
9.1 CU-4E23QBR .............................................38
9.2 CU-4E27QBR .............................................39
9.3 CU-5E34QBR .............................................40
10. Installation Instruction.....................................41
10.1 Select the Best Location.............................41
10.2 Install the Outdoor Unit...............................42
10.3 Connect the Piping .....................................42
10.4 Evacuation of the Equipment .....................43
10.5 Connect the Cable to the Outdoor Unit ......44
10.6 Heat Insulation............................................45
10.7 Disposal of Outdoor Unit Drain Water ........45
11. Installation Instruction.....................................46
11.1 Select the Best Location.............................46
11.2 Install the Outdoor Unit...............................47
11.3 Connect the Piping .....................................47
11.4 Evacuation of the Equipment .....................48
11.5 Connect the Cable to the Outdoor Unit ......49
11.6 Heat Insulation............................................50
11.7 Disposal of Outdoor Unit Drain Water ........50
12. Operation Control.............................................51
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12.1 Cooling Operation...................................... 51
12.2 Heating Operation ..................................... 52
13. Simultaneous Operation Control ................... 53
14. Protection Control ........................................... 54
14.1 Freeze Prevention Control (Cool).............. 54
14.2 Dew Prevention Control (Cool).................. 54
14.3 Electronic Parts Temperature Rise
Protection 1 (Cool)..................................... 54
14.4 Electronic Parts Temperature Rise
Protection 2 (Cool)..................................... 54
14.5 Cooling Overload Control (Cool) ............... 55
14.6 Heating Overload Control (Heat)............... 55
14.7 Extreme Low Temperature Compressor
Low Pressure Protection Control (Heat).... 55
14.8 Deice Control............................................. 56
14.9 Time Delay Safety Control (Restart
Control) ...................................................... 56
14.10 30 seconds Force Operation ..................... 56
14.11 Total Current Control ................................. 56
14.12 IPM (power transistor) Protection
Control ....................................................... 56
14.13 Compressor Protection Control (Gas
Leak Detection Control 1).......................... 57
14.14 Compressor Protection Control (Gas
Leak Detection Control 2).......................... 57
14.15 Valve Close Detection Control .................. 57
14.16 Compressor Discharge High Pressure
Protection Control...................................... 57
15. Servicing Mode ................................................ 58
15.1 Cooling Only Operation ............................. 58
16. Troubleshooting Guide................................... 61
16.1 Self Diagnosis Function............................. 61
17. Disassembly and Assembly Instructions ..... 64
17.1 Outdoor Unit Removal Procedure
(CU-4E23QBR).......................................... 64
17.2 Outdoor Unit Removal Procedure
(CU-4E27QBR CU-5E34QBR)................. 67
18. Technical Data ................................................. 70
18.1 Operation Characteristics
(CU-4E23QBR).......................................... 70
18.2 Operation Characteristics
(CU-4E27QBR).......................................... 82
18.3 Operation Characteristics
(CU-5E34QBR)........................................ 112
19. Exploded View and Replacement Parts
List .................................................................. 144
19.1 CU-4E23QBR .......................................... 144
19.2 CU-4E27QBR CU-5E34QBR ................. 147
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