
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 ...................................................11
4.Features.............................................................25
5.Location of Controls and Components..........26
5.1Indoor Unit ..................................................26
5.2Outdoor Unit ...............................................26
5.3Remote Control ..........................................26
6.Dimensions .......................................................27
6.1Indoor Unit ..................................................27
6.2Outdoor Unit ...............................................28
7.Refrigeration Cycle Diagram ...........................31
7.1CS-Z25UD3RAW CU-Z25UBRA
CS-Z35UD3RAW CU-Z35UBRA...............31
7.2CS-Z50UD3RAW CU-Z50UBRA
CS-Z60UD3RAW CU-Z60UBRA...............32
8.Block Diagram ..................................................33
9.Wiring Connection Diagram ............................34
9.1Indoor Unit ..................................................34
9.2Outdoor Unit ...............................................35
10.Electronic Circuit Diagram ..............................38
10.1Indoor Unit ..................................................38
10.2Outdoor Unit ...............................................39
11.Printed Circuit Board .......................................42
11.1Indoor Unit ..................................................42
11.2Outdoor Unit ...............................................43
12.Installation Instruction.....................................45
12.1Indoor Unit ..................................................46
12.2Outdoor Unit ...............................................57
13.Installation and Servicing Air Conditioner
using R32 ..........................................................62
13.1About R32 Refrigerant................................62
13.2Characteristics of R32 Refrigerant .............62
13.3Refrigerant piping installation • Tools used
in services...................................................64
13.4New installation, Relocation, Repairing of
Refrigerant Cycle System The
Procedures .................................................68
13.5Piping installation of R32............................69
13.6Installation, Relocation, and Service ..........70
13.7Repairing of refrigerant cycle / Brazing
point............................................................74
13.8<Reference> Analysis method for no error
code, no cooling / no warming....................80
14.Operation and Control .....................................82
14.1Basic Function ............................................82
14.2Quiet Operation (Cooling Mode/Cooling
Area of Soft Dry Mode)...............................85
14.3Powerful Mode Operation...........................86
14.4Timer Control..............................................86
14.5Auto Restart Control...................................86
14.6Indication Panel ..........................................86
14.7HA Terminal (HAJEM-A) ............................87
14.8Drain Pump Control ....................................88
14.9Pump down Operation by CN-S .................88
14.10Demand Control .........................................88
15.Operation Control (For Multi Split
Connection).......................................................89
15.1Cooling operation .......................................89
15.2Soft Dry Operation......................................89
15.3Heating Operation ......................................89
15.4Automatic Operation...................................90
15.5Indoor Fan Motor Operation .......................90
15.6Powerful Mode Operation...........................90
15.7Auto Restart Control...................................90
15.8Indication Panel ..........................................90
16.Protection Control ............................................91
16.1Protection Control for All Operations..........91
16.2Protection Control for Cooling & Soft Dry
Operation....................................................93
16.3Protection Control for Heating
Operation....................................................94
17.Servicing Mode .................................................96
17.1TEST RUN OPERATION (FOR PUMP
DOWN/SERVICING PURPOSE) ...............96
18.Troubleshooting Guide....................................97
18.1Refrigeration Cycle System........................97
18.2Breakdown Self Diagnosis Function...........99
18.3Error Codes Table ................................... 100
18.4Self-diagnosis Method............................. 102
19.Disassembly and Assembly Instructions ... 130
19.1Indoor Electronic Controller, Blower Fan,
Fan Motor & Drain Motor Removal
Procedure. ............................................... 130
19.2Outdoor Electronic Controller Removal
Procedure ................................................ 133
20.Technical Data ............................................... 136
20.1Cool Mode Performance Data................. 136
20.2Heat Mode Performance Data................. 140
20.3Fan Performance..................................... 141
21.Service Data ................................................... 145
21.1Cool Mode Outdoor Air Temperature
Characteristic........................................... 145
21.2Heat Mode Outdoor Air Temperature
Characteristic........................................... 149
21.3Piping Length Correction Factor.............. 153
22.Exploded View and Replacement Parts
List .................................................................. 156
22.1Indoor Unit ............................................... 156
22.2Outdoor Unit ............................................ 161