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28 - E-51028230XT/BG
General
The autodiagnostic system considers
any system status other than normal as
a problem.
Before taking any action, note down
the messages displayed on the control
panel.
Certain problems may prevent the
control panel from functioning.
In this case, it is strongly
recommended to call the APC by
Schneider Electric after-sales
support department.
◗ If the load is still correctly supplied
with power, it has probably been
transferred to the bypass AC source
(static bypass) and is therefore no
longer protected (if the system is in on-
line mode);
◗ if the load is no longer supplied with
power, transfer it manually to the
maintenance bypass (see section
below).
Alarms
Maintenance bypass
This operation is possible only if the
system includes a bypass AC source.
It results in the load being directly
supplied by the bypass AC source via
maintenance bypass switch Q3BP, thus
ensuring a higher level of security in the
event of a malfunction.
Switching procedures are explained on
drawings next to each switch in the
UPS cubicle and the external bypass
unit. See section "maintenance
configuration".