16
4 Operation (LED model)
4.2.3 Bypass mode
When operating in bypass mode set up through UPSilon software, the display
on the front panel is show in the following diagram. The utility power indicator
and the bypass indicator are turn on. The load/battery capacity indicator will be
turned on in accordance with the load capacity connected.
1. If the utility power indicator blinks, it shows that the voltage or frequency of
the utility power is out of the input range of the UPS or there are problems
with reversed polarity (L/N) of site wiring or disconnect to the ground for
protection.
2. When operating in bypass mode, the UPS beeps every 2 minutes, If the
“Function” key is pressed for more than 2 seconds, the alarm will not beep
(silence function). Press the “Function” key more than 2 seconds again to
resume the alarm function.
Notes: When operating in bypass mode, the backup function of the UPS is not
available and the power used by the load is directly from the utility
power via internal EMI filter.
Figure 4-4 Bypass Mode
