All LED indicators are turned off in standby mode operation (as shown in the figure
below), meanwhile LCD display Stdby characters.
There are several situations as follows to enter standby mode:
•
Bypass is abnormal after the UPS is powered up (including frequency
conversion enable) and the UPS isn't turned on;
•
In mains power mode
I
battery mode
I
frequency conversion mode, shut down
the UPS when bypass is abnormal;
•
Shut down the single UPS unit when inverter of parallel UPS units is operating;
•
Exit fault mode and bypass is abnormal;
I
D
D 11
Maintenance bypass
.-----------✓--------------,
Bypass input
----------✓---------------,
Mains circuit input __ ,,.,,.
AC / DC rectifier
DC
I
DC boost
DC
I
AC inverter
Charger
Standby mode operation process
5.3 Bypass mode
In bypass mode, mains power of bypass input goes through the filter to the load. If
mains circuit input is normal, then automatically process AC/ DC rectification, after
rectifying automatically start the charger charging batteries.
LED indicator in bypass mode is as shown in the figure below (white color indicates
illuminated status), meanwhile LCD display byPASS characters.
D
D
I
D
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