9 FAQ
9.1 Starting the UPS in Battery Mode
Procedure
Step 1 Ensure that batteries have been connected properly. Use a multimeter to check
that the absolute voltages of positive and negative battery strings are greater than
a certain value (Single battery voltage x Number of batteries in the battery string).
Step 2 Turn o the mains and bypass upstream input switches, and turn on the battery
circuit breaker. If there are multiple battery strings, turn on the circuit breaker for
each battery string and then the general circuit breaker between the battery
strings and the UPS.
Step 3 Use a multimeter to measure the positive and negative battery string voltages at
the UPS battery input terminal. If the absolute values of the voltages are greater
than a certain value (single battery voltage x number of batteries in the battery
string), the batteries are connected properly.
Step 4 Press and hold down the BATT START button on the bypass unit for at least 2
seconds. The system automatically enters the battery cold start status. The MDU
displays the initialization progress bar.
Step 5 After the initialization is complete, start the inverter on the LCD.
----End
9.2 Transferring to Bypass Mode
Before you shut down the inverter, ensure that the bypass is normal. If the bypass
is abnormal, after you shut down the inverter, the UPS supplies no power, and the
loads are powered o.
UPS5000-A-(30 kVA-120 kVA)
User Manual 9 FAQ
Issue 17 (2024-02-21) Copyright © Huawei Digital Power Technologies Co., Ltd. 159
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