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The table below provides a summary of the UPS operating modes under various utility AC power source
and battery conditions.
Utility Condition
UPS Operating Mode
LEDs
Normal
Working power starts after approximately 2 seconds,
LEDs on the panel will blink and fans will start. Press
the ON button for 1-5 seconds. The UPS starts up
normally.
、
、
and
LEDs remain lit
Abnormal (under or over
voltage or absent)
Rectifier and charger stop operating. Battery discharges
via DC-DC boost circuit and supplies Inverter. Loads
continue to receive supply from Inverter. Alarm buzzer
beeps. UPS now in battery mode.
LED off, LED illuminated
Utility abnormal or absent, or
battery voltage low
Rectifier and charger stop operating. Battery discharges
via DC-DC boost circuit and supplies Inverter. Alarm
buzzer beeps quickly, indicating battery power low and
Inverter may stop supplying soon.
LED off, and
LEDs
illuminated
5.3
Audible Alarm Codes
The following table contains common UPS statuses with their Audible Alarm codes.
UPS Status
Audible Alarm
Code
UPS faulty, Inverter shut down. All functions
inhibited.
Long Continuous Beep
Control keypad error
Long Continuous Beep
UPS faulty, loads continue to be supplied via
Inverter or Bypass.
Single beep every two seconds
In battery mode
Single beep once per second
Battery low
Quick and short successive beeps
Confirm RS-232 port receiving
two quick and short beeps
Service mode okay
one quick and short beep
9
5.2
Modes Of Operation.
DBL MX-U Series UPS Outdoors 1000-2000W 120V Manual English
20180312
- This manual is for qualified personnel only