Panasonic CS-TZ20WKEW, Service Manual, Page: 3 / 233

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TABLE OF CONTENTS
PAGE PAGE
1. Safety Precautions ............................................. 5
2. Precaution for Using R32 Refrigerant .............. 8
3. Specifications ................................................... 12
4. Features ............................................................ 33
5. Location of Controls and Components .......... 34
5.1 Indoor Unit .................................................. 34
5.2 Outdoor Unit ............................................... 34
5.3 Remote Control .......................................... 35
6. Dimensions ....................................................... 36
6.1 Indoor Unit .................................................. 36
6.2 Outdoor Unit ............................................... 38
7. Refrigeration Cycle Diagram ........................... 40
7.1 CS-TZ20WKEW CU-TZ20WKE
CS-TZ25WKEW CU-TZ25WKE
CS-TZ35WKEW CU-TZ35WKE
CS-TZ42WKEW CU-TZ42WKE
CS-RZ20WKEW CU-RZ20WKE
CS-RZ25WKEW CU-RZ25WKE
CS-RZ35WKEW CU-RZ35WKE ............... 40
7.2 CS-TZ50WKEW CU-TZ50WKE
CS-TZ60WKEW CU-TZ60WKE
CS-RZ50WKEW CU-RZ50WKE ............... 41
7.3 CS-TZ71WKEW CU-TZ71WKE ................ 42
8. Block Diagram .................................................. 43
8.1 Indoor Unit .................................................. 43
8.2 Outdoor Unit ............................................... 44
9. Wiring Connection Diagram ............................ 46
9.1 Indoor Unit .................................................. 46
9.2 Outdoor Unit ............................................... 48
10. Electronic Circuit Diagram .............................. 50
10.1 Indoor Unit .................................................. 50
10.2 Outdoor Unit ............................................... 52
11. Printed Circuit Board ....................................... 54
11.1 Indoor Unit .................................................. 54
11.2 Outdoor Unit ............................................... 58
12. Installation Instruction ..................................... 61
12.1 Select the Best Location ............................ 61
12.2 Indoor Unit .................................................. 63
12.3 Outdoor Unit ............................................... 71
13. Installation and Servicing Air Conditioner
using R32 .......................................................... 75
13.1 About R32 Refrigerant ............................... 75
13.2 Characteristics of R32 Refrigerant ............. 75
13.3 Refrigerant piping installation • Tools used
in services .................................................. 77
13.4 New installation, Relocation,
Repairing of Refrigerant Cycle System
The Procedures .......................................... 81
13.5 Piping installation of R32 ............................ 82
13.6 Installation, Relocation, and Service .......... 83
13.7 Repairing of refrigerant cycle /
Brazing point .............................................. 87
13.8 <Reference> Analysis method for no error
code, no cooling / no warming ................... 93
14. Operation Control ............................................. 95
14.1 Basic Function ............................................ 95
14.2 Indoor Fan Motor Operation ....................... 96
14.3 Outdoor Fan Motor Operation .................... 97
14.4 Airflow Direction ......................................... 98
14.5 Timer Control ............................................ 101
14.6 Sleep Mode Operation ............................. 102
14.7 Auto Restart Control ................................. 103
14.8 Indication Panel ........................................ 103
14.9 Quiet Operation (Cooling Mode/Cooling
Area of Dry Mode) .................................... 103
14.10 Quiet Operation (Heating) ........................ 104
14.11 Powerful Mode Operation ........................ 104
14.12 Wireless LAN Control ............................... 104
15. Operation Control
(For Multi Split Connection) .......................... 107
15.1 Cooling operation ..................................... 107
15.2 Soft Dry Operation .................................... 107
15.3 Heating Operation .................................... 107
15.4 Automatic Operation ................................ 108
15.5 Indoor Fan Motor Operation ..................... 108
15.6 Powerful Mode Operation ........................ 108
15.7 Auto Restart Control ................................. 108
15.8 Indication Panel ........................................ 108
16. Protection Control .......................................... 109
16.1 Protection Control for All Operations ........ 109
16.2 Protection Control for Cooling & Soft Dry
Operation .................................................. 111
16.3 Protection Control for Heating
Operation .................................................. 112
17. Servicing Mode ............................................... 114
17.1 Auto OFF/ON Button ................................ 114
17.2 Heat Only Operation ................................ 115
17.3 Remote Control Button ............................. 117
18. Troubleshooting Guide .................................. 124
18.1 Refrigeration Cycle System ...................... 124
18.2 Breakdown Self Diagnosis Function ........ 126
18.3 Error Codes Table .................................... 127
18.4 Self-diagnosis Method .............................. 129
19. Disassembly and Assembly Instructions .... 157
19.1 CS-TZ20WKEW CS-TZ25WKEW
CS-TZ35WKEW CS-TZ42WKEW
CS-TZ50WKEW CS-RZ20WKEW
CS-RZ25WKEW CS-RZ35WKEW
CS-RZ50WKEW ....................................... 157
19.2 CS-TZ60WKEW CS-TZ71WKEW ........... 162
19.3 To Replace Wireless LAN Module
(Network Adapter) .................................... 167
19.4 Outdoor Electronic Controller Removal
Procedure ................................................. 168
19.5 To Set Panasonic Comfort Cloud App.
After Replace Main Printed Circuit Board
and Wireless LAN Module ......................... 171