Troubleshooting guide

There are 4 LEDs on front panel to show the UPS working status:
Display
Provides a digital indication of the battery discharge time.
H: hours, M: minutes, S: seconds
Provides an indication of the output voltage, frequency or battery voltage.
VAC: output voltage, VDC: battery voltage, Hz: frequency
Indicates the load level at 0-25%, 26-50%, 51-75%, and 76-100%.
Indicates the load or the output is short.
Overload indication.
Indicates that the programmable outputs are working.
Indicates that the UPS is connected to the mains.
Indicates the battery is in working status.
Indicates the bypass circuit is in working status.
Indicates the ECO mode is enabled.
Indicates the Inverter circuit is working.
Indicates the output connector is working properly.
Indicates the battery is not connected.
Low battery and low voltage indicator.
Indicates the input voltage or frequency or battery voltage.
VAC: Input voltage, VDC: battery voltage, Hz: input frequency
Indicates the battery is charged at 0-25%, 26-50%, 51-75%,
and 76-100% of its capacity.
Indicates that a warning or fault has occurred.
Displays the fault codes, listed in detail in the sections below.
Indicates that the UPS alarm has been disabled.
Function
Backup time information
Fault information
Mute operation
Output & battery voltage information
Load information
Programmable output information
Mode operation information
Battery information
Input & battery voltage information