2 
TABLE OF CONTENTS 
PAGE     PAGE
1. Safety Precautions ............................................. 3
2. Precaution for Using R32 Refrigerant .............. 6
3. Specification ..................................................... 10
4. Features ............................................................. 22
5. Location of Controls and Components .......... 23
5.1 Indoor Unit .................................................. 23
5.2 Outdoor Unit ............................................... 23
5.3 Remote Control .......................................... 23
6. Dimensions ....................................................... 24
6.1 Indoor Unit .................................................. 24
6.2 Outdoor Unit ............................................... 26
7. Refrigeration Cycle Diagram ........................... 28
7.1 CU-Z20TKR  CU-Z25TKR  CU-Z35TKR .... 28
7.2 CU-Z42TKR  CU-Z50TKR  CU-Z60TKR   
CU-Z71TKR  CU-Z80TKR .......................... 29
8. Block Diagram .................................................. 30
8.1 CU-Z20TKR  CU-Z25TKR  CU-Z35TKR   
CU-Z42TKR  CU-Z50TKR   CU-Z60TKR  
CU-Z71TKR ................................................ 30
8.2 CU-Z80TKR ................................................ 31
9. Wiring Connection Diagram ............................ 32
9.1 Indoor Unit .................................................. 32
9.2 Outdoor Unit ............................................... 33
10. Electronic Circuit Diagram .............................. 36
10.1 Indoor Unit .................................................. 36
10.2 Outdoor Unit ............................................... 37
11. Printed Circuit Board ....................................... 40
11.1 Indoor Unit .................................................. 40
11.2 Outdoor Unit ............................................... 44
12. Installation Instruction ..................................... 47
12.1 Select the Best Location ............................. 47
12.2 Indoor Unit .................................................. 48
12.3 Outdoor Unit ............................................... 53
12.4 Wired Remote Controller Installation  
Manual ........................................................ 58
13. Installation and Servicing Air Conditioner 
using R32 .......................................................... 63
13.1 About R32 Refrigerant ................................ 63
13.2 Characteristics of R32 Refrigerant ............. 63
13.3 Refrigerant piping installation • Tools used  
in services ................................................... 65
13.4 New installation, Relocation, Repairing of  
Refrigerant Cycle System The  
Procedures ................................................. 69
13.5 Piping installation of R32 ............................ 70
13.6 Installation, Relocation, and Service .......... 71
13.7 Repairing of refrigerant cycle / Brazing  
point ............................................................ 75
13.8 <Reference> Analysis method for no error  
code, no cooling / no warming .................... 81
14. Operation and Control ..................................... 83
14.1 Basic Function ............................................ 83
14.2 Indoor Fan Motor Operation .......................85
14.3 Outdoor Fan Motor Operation ....................85
14.4 Airflow Direction ..........................................86
14.5 Quiet Operation (Cooling Mode/Cooling  
Area of Dry Mode) ......................................88
14.6 Quiet Operation (Heating) ..........................88
14.7 Powerful Mode Operation ...........................89
14.8 Mild Dry Cooling Operation ........................89
14.9 Timer Control ..............................................89
14.10 Auto Restart Control ...................................90
14.11 Indication Panel ..........................................90
14.12 nanoe-G Operation .....................................90
14.13 In-filter Deactivation Operation ...................92
14.14 ECONAVI Operation...................................93
14.15 HA Terminal (HAJEM-A) ......................... 102
14.16 Demand Control ...................................... 102
14.17 Pump down Operation by CN-S .............. 103
15. Protection Control ......................................... 104
15.1 Protection Control for All Operations ....... 104
15.2 Protection Control for Cooling & Soft Dry  
Operation .................................................  106
15.3 Protection Control for Heating  
Operation .................................................  107
16. Servicing Mode .............................................. 109
16.1 Auto OFF/ON Button ............................... 109
16.2 Remote Control Button ............................ 110
17. Troubleshooting Guide .................................  113
17.1 Refrigeration Cycle System ..................... 113
17.2 Breakdown Self Diagnosis Function ........ 115
17.3 Error Code Table .....................................  116
17.4 Self-diagnosis Method ............................. 118
18. Disassembly and Assembly Instructions ... 146
18.1 CS-Z20TKR  CS-Z25TKR  CS-Z35TKR   
CS-Z42TKR .............................................  146
18.2 CS-Z50TKR  CS-Z60TKR  CS-Z71TKR   
CS-Z80TKR .............................................  153
18.3 Outdoor Electronic Controller Removal  
Procedure ................................................ 160
19. Technical Data ............................................... 163
19.1 Cool Mode Performance Data ................. 163
19.2 Heat Mode Performance Data ................. 166
20. Service Data ...................................................  168
20.1 Cool Mode Outdoor Air Temperature  
Characteristic ...........................................  168
20.2 Heat Mode Outdoor Air Temperature  
Characteristic ...........................................  176
20.3 Piping Length Correction Factor .............. 184
21. Exploded View and Replacement Parts  
List .................................................................. 187
21.1 Indoor Unit ...............................................  187
21.2 Outdoor Unit ............................................ 197