Troubleshooting guide

3-3. Audible alarm
3-4. Single UPS Operation
Description
UPS status
Bypass mode
Battery mode
Fault mode
Warning
Overload
Low battery
Battery unconnected
Over charge
EPO enable
Fan failure/Over temperature
Charger failure
IP fuse blown
Overload 3 times in 30min
EPO status
Cover of maintenance switch is open
Parallel protection
Fault
Bus start failure
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 is short circuited
Inverter relay is short circuited
Parallel communication failure
Parallel output current unbalance
Over temperature
CPU communication failure
Overload
Buzzer status
Beeps once every 2 minutes
Beeps once every 4 seconds
Beeps continuously
Beeps twice every second
Beeps once every second
Beeps continuously
Yes
Yes
No
Mute
1. Turn on the UPS with utility power (in AC mode)
Turn on the UPS with utility power supply (On-grid /AC mode).
After making sure that the power supply connection is correct, set the input breaker to the “ON” position first. At this
point, the fan will start running while the UPS supplies power to the load via the bypass. The UPS is now operating in
Bypass mode.
Note: When the UPS is in Bypass Mode, the output voltage will directly power the load from utility after you have
switched on the input breaker. In Bypass Mode, the load is not protected by the UPS. To protect your load devices, you
should turn on the UPS.
1)