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3-3. Audible Alarm
Description
Buzzer status
Muted
UPS status
Bypass mode
Beeping once every 2 minutes
Yes
Battery mode
Beeping once every 4 seconds
Fault mode
Beeping continuously
Warning
Overload
Beeping twice every second
No
Low battery
Beeping once every second
Battery unconnected
Over charge
EPO enable
Fan failure/Over temperature
Charger failure
IP fuse broken
Overload 3 times in 30min
EPO status
Cover of maintain switch is open
Parallel protection
Fault
Bus start failure
Beeping continuously
Yes
Bus over
Bus under
Bus unbalance
Inverter soft start failure
High Inverter voltage
Low Inverter voltage
Inverter output short circuited
Negative power fault
Battery SCR short circuited
Inverter relay short circuited
Parallel communication failure
Parallel output current unbalance
Over temperature
CPU communication failure
Overload
3-4. Single UPS Operation
1. Turn on the UPS with utility power supply (in AC mode)
1) After power supply is connected correctly, set the breaker of the battery pack at “ON” position (the
step only available for long-run model). Then set the input breaker at “ON” position. At this time
the fan is running and the UPS supplies power to the loads via the bypass. The UPS is operating in
Bypass mode.
NOTE:
When UPS is in Bypass mode, the output voltage will directly power from utility after you
