Batt.
undervolt.
0026-01 Minor Automatic An alarm is
displayed,
and the
system may
shut down
due to EOD.
Possible cause: The mains is
abnormal, and the batteries
are overdischarged.
Measure: Connect to the
mains supply in non-battery
test state.
Rectifier
fault
0040-04 Critical Manual/Po
wer-
off/Autom
atic
The UPS
shuts down.
The UPS
transfers to
another
working
mode or
shuts down.
The mains has experienced
a transient high voltage.
The output carries special
loads such as inductive and
The output carries
transformer loads but the
transformer mode is not
enabled.
Measures:
•
Rectify the fault and power
Check that the loads are
supported by the UPS.
Enable the transformer
mode.
Contact Huawei technical
support.
Internal
fault
0042-10 Critical Automatic
has not
started,
disable
inverter
startup.
has started,
the UPS can
work in
inverter
mode
properly, but
the UPS
cannot
transfer to
bypass mode.
Possible cause: The bypass
input cable connection is
inconsistent with the output
system setting.
Measure: Ensure that the
bypass input cable connection
is consistent with the output
system setting.
Fan fault 0043-01 Critical Automatic This alarm
does not
affect the
UPS or the
power supply.
Possible cause: The fan is
abnormal.
Measure: Clean up foreign
objects around the fan. If the
alarm persists, contact Huawei
technical support.