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PROBLEM
POSSIBLE CAUSE
SOLUTION
THE ALARM LIST
SHOWS ONE OR MORE
OF THE FOLLOWING
CODES: L10, L11, L12,
L13
BREAKDOWN OR
MALFUNCTIONING OF THE
STATIC BYPASS
Activate the maintenance bypass (SWMB), switch the
UPS off and then on again. Switch off the maintenance
bypass. If the fault persists, contact the nearest
technical support centre
THE ALARM LIST
SHOWS ONE OR MORE
OF THE
FOLLOWING CODES:
L26, L27, L28
OUTPUT SHORT CIRCUIT
Power off the UPS.
Disconnect all the devices connected to the phase
concerned by the short circuit. Turn the UPS on again.
Reconnect the devices one by one until the faulty one is
identified.
Table 13 – Troubleshooting
