PowerWalker VFI 6000LE Plus - Manual (Page 5)

2
1.2 Mode description
Bypass mode
Bypass mode means that the UPS provides the power through the
internal bypass way to load directly without any regulation. If the
controller detects the mains is abnormal, it will shut off the output to
protect the load. The bypass voltage/frequency range and default
output status (on/off) could be set by communication software.
Line mode
Line mode means that the mains input is rectified/converted by the
AC/DC section and then inverted to stable output by DC/AC section.
In line mode, the output is clean and good to the loads. If the mains
get abnormal, the UPS will transfer to battery mode without interrupt.
Battery mode
Battery mode means that the battery power goes through the DC/DC
section to the inverter (DC/AC) and get a stable backup output when
the mains input is not usable. If the mains input recovered, the UPS
will transfer to line mode without interrupt.
Battery test mode
In this mode, the UPS will stop the AC/DC section and discharge the
battery while mains input is normal. If the controller found the battery
is error, it will transfer back to line mode immediately, and warning by
display to see whether the battery needs to be replaced. The battery
test mode could be trigged in line mode by pressing the button or by
the communication command.
Fault mode
If the UPS generates some internal failure and have to stop its
inverter, it will go into fault mode and alarm by display and buzzer.
In fault mode, the loads have the risk of power loss because the
output will come from the bypass after UPS fault.