Transferring To Maintenance Bypass Mode; Transferring From Maintenance Bypass Mode To Normal Mode - Huawei UPS5000-A-500 kVA User Manual

UPS5000-A-500 kVA
User Manual (e-shelter)

5.7 Transferring to Maintenance Bypass Mode

Prerequisites
The maintenance bypass unit has been installed.
Context
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Procedure
Step 1 Manually switch the UPS to bypass mode.
Step 2 Turn on the maintenance bypass switch.
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5.8 Transferring from Maintenance Bypass Mode to
Normal Mode
Context
Before you transfer the UPS from maintenance bypass mode to normal mode, ensure that the
bypass input and output are normal.
Procedure
Step 1 Turn off the maintenance bypass switch.
Turn the maintenance bypass switch from the ON position to the OFF position.
The Maint. breaker closed alarm disappears from the alarm list. Check whether the UPS
works in bypass mode by viewing the system running status diagram on the LCD or WebUI.
Issue 02 (2020-01-10)
Strictly observe the following procedure to transfer the UPS to maintenance bypass mode.
Otherwise, loads may power off.
In maintenance bypass mode, the mains supplies power to the loads directly over the
maintenance bypass. If the mains is abnormal, the loads may power off.
After the UPS transfers to maintenance bypass mode, the Maint. breaker closed and Bypass mode
alarms are displayed on the MDU.
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