5.4 Setting ECO Mode.............................................................................................................................................................. 126

5.5 Starting the Inverter.......................................................................................................................................................... 128

5.6 Shutting Down and Powering Off the UPS............................................................................................................... 129

6 Parallel System Commissioning.......................................................................................131

6.1 Starting a Parallel System............................................................................................................................................... 131

6.2 Shutting Down and Powering Off a Parallel System............................................................................................. 136

6.3 Performing EPO...................................................................................................................................................................137

6.4 Commissioning a Dual-Bus System..............................................................................................................................137

7 Maintenance.........................................................................................................................139

7.1 UPS Maintenance............................................................................................................................................................... 141

7.2 Lead-Acid Battery Maintenance.................................................................................................................................... 145

7.3 Testing Batteries..................................................................................................................................................................150

7.3.1 Forced Equalized Charging Test................................................................................................................................. 151

7.3.2 Shallow Discharge Test................................................................................................................................................. 152

7.3.3 Capacity Test..................................................................................................................................................................... 153

7.3.4 Test Data Download...................................................................................................................................................... 154

8 Troubleshooting...................................................................................................................155

9 FAQ......................................................................................................................................... 159

9.1 Starting the UPS in Battery Mode................................................................................................................................ 159

9.2 Transferring to Bypass Mode.......................................................................................................................................... 159

9.3 Transferring to Maintenance Bypass Mode............................................................................................................... 160

9.4 Transferring from Maintenance Bypass Mode to Normal Mode....................................................................... 161

9.5 Performing EPO...................................................................................................................................................................162

9.6 Clearing the EPO State..................................................................................................................................................... 163

A Acronyms and Abbreviations........................................................................................... 164

Issue 17 (2024-02-21)

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Table of Contents