LEGRAND KEOR HP Série Manuel De L'utilisateur page 46

Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
46 OMD10074 REV. C
UPS user manual
Manuel de l'utilisateur de l'UPS
Utilizzo dell'UPS
A17 RETRANSFER BLOCK
The load is blocked on the bypass line.
 Very frequent changeovers due to load in-rush currents.
 Static switch problems.
1. Reset the system.
2. Check the in-rush currents of the loads.
3. If the alarm persists, contact our Technical Support Service.
A18 MBCB CLOSED
The manual bypass isolator is closed.
 Manual bypass isolator closed.
1. Check the status of the manual bypass isolator.
2. Check the functionality of the auxiliary contact of the isolator.
3. If the alarm persists, contact our Technical Support Service.
A19 OCB OPEN
The output isolator is open.
 Output isolator open.
1. Check the status of the output isolator.
2. Check the functionality of the auxiliary contact of the isolator.
3. If the alarm persists, contact our Technical Support Service.
A20 OVERLOAD
The current sensor has detected an overload at the output. If the alarm
persists, the thermal image protection will be activated (alarm A21).
 Output overload.
 Measuring circuit failure.
1. Check the loads connected to the UPS output.
2. Contact our Technical Support Service.