LEGRAND 311087, Руководство по эксплуатации

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UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
50 OMW07104 REV. A
Alarm A14 BYPASS WR SEQ
Description The phase rotation of the bypass line is wrong.
Possible
causes

Wrong connection of power cables.
Solutions Check the phase rotation.
If the alarm persists, contact our Technical Support Service.
Alarm A15 BYPASS FAULT
Description The voltage or frequency of the bypass line are out of tolerance.
Possible
causes

Bypass line instability or failure.

Wrong phase rotation.
Solutions Check the connections to the mains.
Check the stability of mains voltage.
If the alarm persists, contact our Technical Support Service.
Alarm A16 BYPASS --> LOAD
Description The load is fed by the bypass line.
Possible
causes

Temporary changeover due to inverter failure.
Solutions Verify the inverter status and check whether other alarms are present.
If the alarm persists, contact our Technical Support Service.
Alarm A17 RETRANSFER BLOCK
Description The load is blocked on the bypass line.
Possible
causes

Very frequent changeovers due to load in-rush currents.

Static switch problems.
Solutions Reset the system.
Check the in-rush currents of the loads.
If the alarm persists, contact our Technical Support Service.
Alarm A18 MBCB CLOSED
Description The manual bypass isolator is closed.
Possible
causes

Manual bypass isolator closed.
Solutions Check the status of the manual bypass isolator.
Check the functionality of the auxiliary contact of the isolator.
If the alarm persists, contact our Technical Support Service.