C650 & C650R User
Manual Page 24
THE BUZZER
The buzzer
General Meaning
1 beep every 2 minutes
Load supplied on bypass
1 beep every 4 seconds
Load supplied on battery
If battery low, beep every second
1 beep every second
General warning active
2 beeps every second
Overload warning
Continuous
Fault active
BACKLIGHT
After 10 minutes of inactivity, the LCD backlight will automatically dim. Press any button to restore the screen.
5.2
LCD DESCRIPTION
Operation status
Cause
Description
Standby mode
The UPS is Off without output.
Online mode
The UPS is operating normally and protecting the equipment.
1 beep every 4
seconds
Battery mode
A utility failure has occurred, and the UPS is powering the equipment with
battery.
Prepare your equipment for shutdown.
1 beep every 1
seconds
Battery mode with
battery low
This warning is approximate, and the actual time to shutdown may vary
significantly.
High Efficiency mode
When the mains are lost or abnormal, the UPS will transfer to Line mode or
Battery mode and the load is supplied continuously.
Converter mode
The UPS would free run with fixed output frequency (50Hz or 60Hz).
The output maximum power and maximum charging current should be derating
to 60% in converter mode.
Bypass mode
Overload or fault has occurred, or a command has been received, and the UPS is
in Bypass mode.
Battery test
UPS is executing a battery test
Battery fail
The UPS detects bad battery or battery disconnected
