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.
Specification ..................................................... 11
4.
Features ............................................................. 23
5.
Location of Controls and Components .......... 24
5.1
Indoor Unit .................................................. 24
5.2
Outdoor Unit ............................................... 24
5.3
Remote Control .......................................... 24
6.
Dimensions ....................................................... 25
6.1
Indoor Unit .................................................. 25
6.2
Outdoor Unit ............................................... 27
7.
Refrigeration Cycle Diagram ........................... 29
7.1
CU-Z20VKR CU-Z25VKR CU-Z35VKR ... 29
7.2
CU-Z42VKR CU-Z50VKR CU-Z60VKR
CU-Z71VKR CU-Z80VKR ......................... 30
8.
Block Diagram .................................................. 31
8.1
CU-Z20VKR ................................................ 31
8.2
CU-Z25VKR CU-Z35VKR ......................... 32
8.3
CU-Z42VKR CU-Z50VKR CU-Z60VKR
CU-Z71VKR ................................................ 33
8.4
CU-Z80VKR ................................................ 34
9.
Wiring Connection Diagram ............................ 35
9.1
Indoor Unit .................................................. 35
9.2
Outdoor Unit ............................................... 36
10.
Electronic Circuit Diagram .............................. 40
10.1
Indoor Unit .................................................. 40
10.2
Outdoor Unit ............................................... 42
11.
Printed Circuit Board ....................................... 49
11.1
Indoor Unit .................................................. 49
11.2
Outdoor Unit ............................................... 52
12.
Installation Instruction ..................................... 57
12.1
Select the Best Location ............................. 57
12.2
Indoor Unit .................................................. 58
12.3
Outdoor Unit ............................................... 63
12.4
Wired Remote Controller Installation
Manual (Optional Accessory:
CZ-RD514C) ............................................... 68
13.
Installation and Servicing Air Conditioner
using R32 .......................................................... 73
13.1
About R32 Refrigerant ................................ 73
13.2
Characteristics of R32 Refrigerant ............. 73
13.3
Refrigerant piping installation • Tools used
in services ................................................... 75
13.4
New installation, Relocation, Repairing of
Refrigerant Cycle System The
Procedures ................................................. 79
13.5
Piping installation of R32 ............................ 80
13.6
Installation, Relocation, and Service .......... 81
13.7
Repairing of refrigerant cycle / Brazing
point ............................................................ 85
13.8
<Reference> Analysis method for no error
code, no cooling / no warming .................... 91
14.
Operation and Control .....................................93
14.1
Basic Function ............................................93
14.2
Indoor Fan Motor Operation .......................95
14.3
Outdoor Fan Motor Operation ....................95
14.4
Airflow Direction ..........................................96
14.5
Quiet Operation (Cooling Mode/Cooling
Area of Dry Mode) ......................................98
14.6
Quiet Operation (Heating) ..........................98
14.7
Powerful Mode Operation ...........................99
14.8
Mild Dry Cooling Operation ........................99
14.9
Timer Control ..............................................99
14.10
Auto Restart Control ................................ 100
14.11
Indication Panel ....................................... 100
14.12
nanoe
TM
X Operation ............................... 100
14.13
Economy Mode Operation ....................... 102
14.14
HA Terminal (HAJEM-A) ......................... 102
14.15
Demand Control ...................................... 103
14.16
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 ... 143
18.1
CS-Z20VKR CS-Z25VKR CS-Z35VKR
CS-Z42VKR ............................................. 143
18.2
CS-Z50VKR CS-Z60VKR CS-Z71VKR
CS-Z80VKR ............................................. 150
18.3
Outdoor Electronic Controller Removal
Procedure ................................................ 157
19.
Technical Data ............................................... 160
19.1
Cool Mode Performance Data ................. 160
19.2
Heat Mode Performance Data ................. 168
20.
Service Data ................................................... 170
20.1
Cool Mode Outdoor Air Temperature
Characteristic ........................................... 170
20.2
Heat Mode Outdoor Air Temperature
Characteristic ........................................... 178
20.3
Piping Length Correction Factor .............. 186
21.
Exploded View and Replacement Parts
List .................................................................. 188
21.1
Indoor Unit ............................................... 188
21.2
Outdoor Unit ............................................ 196
