Specifications, designs and contents in this Service Manual are subject to change without notice.
2
TABLE OF CONTENTS
PAGE PAGE
1. Safety Precautions ............................................. 3
2. Precaution for Using R32 Refrigerant .............. 6
3. Specifications ................................................... 10
4. Features ............................................................. 19
5. Location of Controls and Components .......... 20
5.1 Indoor Unit .................................................. 20
5.2 Outdoor Unit ............................................... 20
5.3 Remote Control .......................................... 20
6. Dimensions ....................................................... 21
6.1 Indoor Unit .................................................. 21
6.2 Outdoor Unit ............................................... 23
7. Refrigeration Cycle Diagram ........................... 24
7.1 CS-Z25TKEA CU-Z25TKEA
CS-Z35TKEA CU-Z35TKEA
CS-Z42TKEA CU-Z42TKEA ....................... 24
7.2 CS-Z50TKEA CU-Z50TKEA
CS-Z71TKEA CU-Z71TKEA ....................... 25
8. Block Diagram .................................................. 26
8.1 CS-Z25TKEA CU-Z25TKEA
CS-Z35TKEA CU-Z35TKEA
CS-Z42TKEA CU-Z42TKEA ....................... 26
8.2 CS-Z50TKEA CU-Z50TKEA
CS-Z71KEA CU-Z71TKEA ......................... 27
9. Wiring Connection Diagram ............................ 28
9.1 Indoor Unit .................................................. 28
9.2 Outdoor Unit ............................................... 29
10. Electronic Circuit Diagram .............................. 31
10.1 Indoor Unit .................................................. 31
10.2 Outdoor Unit ............................................... 32
11. Printed Circuit Board ....................................... 34
11.1 Indoor Unit .................................................. 34
11.2 Outdoor Unit ............................................... 36
12. Installation Instruction ..................................... 37
12.1 Select the Best Location ............................. 37
12.2 Indoor Unit .................................................. 38
12.3 Outdoor Unit ............................................... 44
13. Installation and Servicing Air Conditioner
using R32 .......................................................... 51
13.1 About R32 Refrigerant ................................ 51
13.2 Characteristics of R32 Refrigerant ............. 51
13.3 Refrigerant piping installation • Tools used
in services ................................................... 53
13.4 New installation, Relocation, Repairing of
Refrigerant Cycle System The
Procedures ................................................. 57
13.5 Piping installation of R32 ............................ 58
13.6 Installation, Relocation, and Service .......... 59
13.7 Repairing of refrigerant cycle / Brazing
point ............................................................ 63
13.8 <Reference> Analysis method for no error
code, no cooling / no warming ....................69
14. Operation Control .............................................71
14.1 Basic Function ............................................71
14.2 Indoor Fan Motor Operation .......................72
14.3 Outdoor Fan Motor Operation ....................73
14.4 Airflow Direction ..........................................74
14.5 Quiet Operation (Cooling Mode/Cooling
Area of Dry Mode) ......................................76
14.6 Quiet Operation (Heating) ..........................76
14.7 Powerful Mode Operation ...........................76
14.8 Timer Control ..............................................77
14.9 Weekly Timer Setting .................................77
14.10 Auto Restart Control ...................................78
14.11 Indication Panel ..........................................78
15. Protection Control ............................................79
15.1 Protection Control for All Operations ..........79
15.2 Protection Control for Cooling & Soft Dry
Operation ....................................................81
15.3 Protection Control for Heating Operation ...82
16. Servicing Mode .................................................84
16.1 Auto OFF/ON Button ..................................84
17. Troubleshooting Guide ....................................85
17.1 Refrigeration Cycle System ........................85
17.2 Breakdown Self Diagnosis Function ...........87
17.3 Error Codes Table ......................................88
17.4 Self-diagnosis Method ................................90
18. Disassembly and Assembly Instructions ... 118
18.1 CS-Z25TKEA CS-Z35TKEA ................... 118
18.2 CS-Z42TKEA CS-Z50TKEA
CS-Z71TKEA ........................................... 124
18.3 Outdoor Electronic Controller Removal
Procedure ................................................ 130
19. Technical Data ............................................... 132
19.1 Cool Mode Performance Data ................. 132
19.2 Heat Mode Performance Data ................. 135
20. Service Data ................................................... 136
20.1 Cool Mode Outdoor Air Temperature
Characteristic ........................................... 136
20.2 Heat Mode Outdoor Air Temperature
Characteristic ........................................... 141
20.3 Piping Length Correction Factor .............. 146
21. Exploded View and Replacement Parts
List .................................................................. 148
21.1 Indoor Unit ............................................... 148
21.2 Outdoor Unit ............................................ 152
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