Working Mode And Transferring; Transfer To Bypass If Overload; Normal Mode To Battery Mode; Goes To Bypass Mode Due To Over Temperature - KStar YDC9300-0.8 User Manual

3.3 Working Mode and transferring

Usually, the UPS should be set to work in AC mode, so it will transfer to battery
mode automatically without interruption when AC is failed. When the UPS is
overloaded, it will transfer to bypass mode without interruption. When the inverter is
defective or over-temperature, the UPS will transfer to bypass mode if the bypass is
normal.

3.3.1 Transfer to bypass if overload

When the load of UPS is beyond normal range and lasts for setting time, it will
transfer to bypass mode and beeps twice every second. Then, the load is powered
by AC directly, at that time, please decrease the load immediately until the alarm is
eliminated. The UPS will start the inverter after 5 minutes. In order to protect the
load and the UPS, it has set the limitation of times of transfer to bypass mode due to
overload in 1 hour. If it exceeds the limitation, UPS will keep in bypass mode.

3.3.2 Normal mode to battery mode

The UPS will go to battery mode if AC is failed. The UPS will shut down
automatically if battery has been exhausted. When AC recovers, the UPS will start
inverter automatically. If the UPS was shut down manually in battery mode, when
AC recovers, it will remain in Bypass mode, which means you can not start the
inverter automatically.

3.3.3 Goes to bypass mode due to over temperature

The temperature inside of the UPS may be high if ambient temperature is high or the
ventilation is poor, then the UPS will go to Bypass mode, the fault indicator will be on
(red), the LCD will display the inner temperature is high and long beeps will come. If
so, please cut off the input power of the UPS, move objects affecting the ventilation
away from the UPS if any or increase the distance between UPS and the wall. Wait
until the UPS temperature becomes normal then restart it.

3.3.4 Output short circuit

When the UPS output is in short circuit, the UPS will cut off the output, the fault
indictor will be on ( red ), and the LCD will display that output is in short circuit and
long beeps come. If so, please disconnect the load in short-circuit, cut off the UPS
input power and wait for 10mins, the UPS will shut down automatically or press the
off button to shut down within 10s.Before restarting the UPS, please make sure that
the short circuit problem has been solved
- 28 -