UPS user manual
Utilizzo dell’UPS
OMD91052 REV. C
45
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
1. Reset the system.
2. Check the in-rush currents of the loads.
3. 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
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.
Alarm
A19
OCB OPEN
Description
The output isolator is open.
Possible
causes
Output isolator open.
Solutions
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.
Alarm
A20
OVERLOAD
Description
The current sensor has detected an overload at the output. If the alarm
persists, the thermal image protection will be activated (alarm A21).
Possible
causes
Output overload.
Measuring circuit failure.
Solutions
1. Check the loads connected to the UPS output.
2. Contact our Technical Support Service.
Summary of Contents for ASD91
Page 1: ...OPERATING MANUAL UPS MANUALE OPERATIVO UPS B8000FXS 10 15 20 30 40 50 60kVA ...
Page 2: ......
Page 4: ......
Page 6: ...Warnings and general information Avvertenze e informazioni generali 2 OMD91048 REV B ...
Page 134: ...UPS user manual Utilizzo dell UPS 6 OMD91052 REV C ...
Page 135: ...UPS user manual Utilizzo dell UPS OMD91052 REV C 7 ENGLISH LANGUAGE ...
Page 181: ...UPS user manual Utilizzo dell UPS OMD91052 REV C 53 LINGUA ITALIANA ...