The warning code 02 is shown, the icon
flashes on LCD display, and alarm
beeps every second.
Check and correct the input
neutral connection. If the
connection is ok and the alarm
is still displaying, please refer to
the LCD setting section, to enter
the neutral loss check menu, to
see if the parameter3 is “CHE”,
if it is, please press the “Enter”
key firstly to make the “CHE”
flash and press the “Enter” key
secondly to make the UPS clear
the alarm. If the warning still
exists, please check input fuses
of L2 and L3.
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