2
PRELIMINARY
Table of Contents
1 Basic Operation 3
1.1 Technical Specifi cations 3
KX Models 3
K and KTV Models 4
SU80K Model 5
1.2 Features 6
1.2.1 Advanced Features 6
1.2.2 Control Panel Features 6
1.2.3 Front and Rear Panel Features 7
1.3 Operating Principles 13
1.3.1 System Layout 13
1.3.2 Internal Battery Layout 13
1.3.3 Power Module Layout 14
1.4 Opening and Closing the Unit 14
1.5 Operating Modes 15
1.5.1 Online (Normal) Mode (Single UPS) 15
1.5.2 Battery Backup Mode (Single UPS) 15
1.5.3 Auto Bypass Mode (Single UPS) 15
1.5.4 Manual Bypass Mode (Single UPS) 15
1.5.5 Online Mode (Parallel UPS) 16
1.5.6 Battery Backup Mode (Parallel UPS) 16
1.5.7 Auto Bypass Mode (Parallel UPS) 16
1.5.8 Manual Bypass Mode (Parallel UPS) 17
1.5.9 Hot Standby Mode (Parallel UPS) 17
1.6 Start-Up, Shutdown and Bypass 18
1.6.1 Control Panel and Breaker Diagrams 18
1.6.2 Preliminary Checklist (Single UPS) 18
1.6.3 Standard Start-Up Procedure (Single UPS) 18
1.6.4 Battery Start-Up Procedure (Single UPS) 19
1.6.5 Manual Bypass Procedure (Single UPS) 20
1.6.6 Shutdown Procedure (Single UPS) 20
1.6.7 Preliminary Checklist (Parallel UPS) 21
1.6.8 Start-Up Procedure (Parallel UPS) 21
1.6.9 Shutdown Procedure (Parallel UPS) 22
1.6.10 Manual Bypass Procedure (Parallel UPS) 23
1.6.11 Switching from Manual Bypass to Normal Mode
(Parallel UPS) 24
1.7 Printed Circuit Boards (PCB) 25
1.7.1 PCB Location (System) 26
1.7.1.1 KX Models 26
1.7.1.2 K Models 28
1.7.1.3 KTV Models 32
1.7.2 PCB Power Module 33
1.8 Block and Wiring Diagrams 34
1.8.1 KX Models 34
1.8.2 K Models 40
1.8.3 KTV Models 45
2 Theory of Operation 48
2.1 AC Auxiliary Power Circuit 48
2.2 DC Auxiliary Power Circuit 51
2.3 Auxiliary Power Failure Detection 51
2.4 Output Current Detection 52
2.5 Input Voltage Detection 53
2.6 Output Voltage Detection 54
2.7 Battery Voltage Detection 55
2.8 Bypass SCR Short-Circuit Detection 56
2.9 Bypass SCR Driver 57
2.10 Watchdog for System MCU 58
2.11 LCD Panel Control Circuit 59
2.12 Fan Control Circuit 60
2.13 Bypass SCR Temperature Detection 61
2.14 Communication Circuit for RS232 61
2.15 Communication Circuit for Slots 62
2.16 Communication Circuit for Output Dry Contact 63
2.17 Communication Circuit for Input Dry Contact and REPO 64
2.18 External Battery Cabinet Temperature Detection 65
2.19 Detection Circuit for Manual Bypass Switch 66
2.20 Detection Circuit for Output Breaker 66
2.21 Control Circuit for Power Module 67
2.22 Transformer Over Temperature Detection 71
3 Communication 72
3.01 RS232 Port 72
3.02 Emergency Power Off (EPO) 72
3.1 Setting EEPROM on the NH-M Board 74
3.1.1 Polling and Updating EEPROM 74
3.1.2 Calibrating EEPROM Gain 75
3.2 Setting Output Dry Contact Status 76
3.3 Upgrading Firmware for the System Board 77
3.4 Upgrading Firmware for the Power Module 82
3.5 Downloading the Event Log 90
4 Internal Battery 91
4.1 Installing and Removing Internal Batteries 92
4.2 Battery Cabinet 95
5 Troubleshooting 98
5.1 Alarm Messages 98
5.2 Troubleshooting Flow Charts 100
5.2.1 “MAIN VOLT/FREQ NOK” 100
5.2.2 “MAIN SEQUENCE NOK” 101
5.2.3 “BYPASS VOLT/FREQ NOK” 102
5.2.4 “BYPASS SEQUENCE NOK” 103
5.2.5 “BYPASS STATIC SWITCH OVER TEMPERATURE” 103
5.2.6 “BYPASS STATIC SWITCH FAULT” 104
5.2.7 “BYPASS STATIC SWITCH OVERLOAD” 104
5.2.8 “UPS INTERNAL COMM ABNORMAL” 105
5.2.9 “BATTERY TEST FAIL” 106
5.2.10 “BATTERY OVER CHARGE” 106
5.2.11 “BATTERY BAD” 107
5.2.12 “BYPASS FAN FAILURE” 108
5.2.13 “TRANSFORMER OVERHEAT” 109
5.2.14 “PS OUTPUT VOLT NOK” 110
5.2.15 “PS EXT PARALLEL COMM ABNORMAL” 111
5.2.16 “PARALLEL FAILURE” 112
5.2.17 “REDUNDANCY LOSS” 113
6 Power Module 114
6.1 Failure Power Module Identify 114
6.2 Power Module Replacement 117
7 Preventive Maintenance 121
7.1 Safety Overview 121
7.2 Suggested tools and supplies 121
7.3 UPS Procedure 121
7.4 Internal Battery Procedure 122
Appendix A Service Equipment and Tools 123
Appendix B Torque Table 124
Appendix C PCB and Test Point 128
