
2. Turn on the UPS without utility power supply (in Battery mode)
1) Make sure that the breaker of the battery pack is at “ON” position (only for long-run model).
2) Press and hold the “ON” button for 1s to turn on the UPS, and the buzzer will beep once.
3) A few seconds later, the UPS will be turned on and enter to Battery mode.
3. Connect devices to UPS
Before the UPS is turned on, you can connect devices to the UPS.
1) Switch on the devices one by one and it will display total load level in LCD panel.
2) If it is necessary to connect the inductive loads such as a printer, the in-rush current should be calculated
carefully to see if it meets the capacity of the UPS, because the power consumption of this kind of loads is
too big.
3) If the UPS is overload, the buzzer will beep twice every second.
4) When the UPS is overload, please remove some loads immediately. It is recommended to have the total
loads connected to the UPS less than 80% of its nominal power capacity to prevent overload for system
safety.
5) If the overload time is over acceptable time listed in spec at AC mode, the UPS will automatically transfer to
Bypass mode. After the overload is removed, it will return to AC mode. If the overload occurs 3 times in half
hour, the UPS will be locked in Bypass mode. UPS can transfer to Line mode only by manual restart. At this
time, if bypass is enabled, the UPS will power to the load via bypass. If bypass function is disabled or the
input power is not within bypass acceptable range, it will cut off output directly.
4. Charge the batteries
1) After the UPS is connected to the utility power, the charger will charge the batteries automatically except in
Battery mode or during battery self-test.
2) It’s suggested to charge batteries at least 10 hours before use. Otherwise, the backup time may be shorter
than expected time.
3) The charging current can be changed from 2A/4A/8A via LCD or software. Please make sure that the
charging current is suitable to battery specification.
5. Battery mode operation
1) When the UPS is in Battery mode, the buzzer will beep according to different battery capacity. If the battery
capacity is more than 25%, the buzzer will beep once every 4 seconds. If the battery voltage drops to the
alarm level, the buzzer will beep quickly (once every sec) to remind users that the battery is at low level and
the UPS will shut down automatically soon. Users could switch off some non-critical loads to disable the
shutdown alarm and prolong the backup time. If there is no more load to be switched off at that time, you
have to shut down all loads as soon as possible to protect the devices or save data. Otherwise, there is a
risk of data loss or power failure.
2) In Battery mode, if buzzer sound annoys, users can press the Mute button to mute the buzzer.
3) The backup time of the long-run model depends on the external battery capacity.
4) The backup time may vary from different environment temperature and load type.
5) When setting backup time limit for 16.5 hours (default value from LCD panel), after maximum discharging
16.5 hours, UPS will shut down automatically to protect the battery. This battery discharge protection can
be enabled or disabled through LCD panel control. (Refer to 4-6 LCD setting section)
6. Turn off the UPS with utility power supply in AC mode
1) Turn off the inverter of the UPS by pressing “OFF” button for at least 2s, and then the buzzer will beep once.
The UPS will turn into Bypass mode.