All the internal power supply is off and the TOUCH SCREEN does not display any more.
NOTE: If the maintenance is required, wait 10 minutes for the internal DC bus capacitance discharging.
WARNING! The UPS maintenance must be done by qualified person only. The parts of UPS circuits also have
hazardous voltage, though the rectifier input switch, bypass input switch and battery switch are
disconnected.
WARNING! For models without Q1, Q2, and Q5, when the external input switch is not disconnected, there is a
hazardous voltage inside the UPS. To perform UPS maintenance and dust removal other switches (including
external maintenance bypass switches) must be installed when using Q3 or the UPS without switch only.
6.3.5 Transfer from maintenance mode to normal mode
Follow the procedure below to transfer the maintenance bypass mode of the UPS to normal mode.
1. Close the output switch Q5, external power bypass switch, bypass input switch Q2, external power main switch,
and rectifier input switch Q1 in turn.
2. Verify that the touchscreen is ON and the UPS runs in Bypass mode.
3. Disconnect the maintenance bypass switch Q3.
4. Start the system according to steps 4 to 7 as specified in Startup procedures in normal mode on page102 .
The UPS runs in Normal mode.
IMPORTANT! Start the bypass first, then disconnect the maintenance bypass switch. Failure to do so may cause
output load power failure.
The load has transferred to UPS normal mode.
6.4 Battery Test Procedures
The battery test function is disabled by default. If you need this function, contact Vertiv's customer service.
The battery self-test includes periodical self-test and manual maintenance self-test.
• When the load factor is 0 to 20%, the system only supports manual maintenance self-test.
• When the load factor is 20% to 100%, the system supports periodical self-test and manual maintenance self-test.
The battery discharges 20% of total battery energy.
Periodical self-test is to test the battery activity. The periodical self-test is regular and the self-test period can be configured
via the Vertiv setting software. During the periodical self-test, if the battery maintenance requirement is met, the system
generates audible/visual alarm and corresponding records. The periodical self-test does not update the battery curve table.
The mode of the manual maintenance self-test is similar to that of the periodical self-test, except for the maintenance self-
test mode is started manually, and this operation is valid only one time, that is the system will not automatically start up the
self-test once you exit. When the load factor is 20% to 100%, during the maintenance self-test, if the battery maintenance
requirement is satisfied, the system will generate audible/visual alarm and corresponding records. The maintenance self-test
does not update the battery curve table.
6 Single UPS Operation Proprietary and Confidential ©2023 Vertiv Group Corp. 115
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
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