UPS user manual
Utilizzo dell’UPS
OMD10082 REV. F
45
Alarm
A30
COMMON ALARM
Description Common
alarm.
Possible
causes
At least one alarm is present.
Solutions
1. Check which alarms are present and carry out the indicated
procedures.
Alarm
A31
MBCB BUS 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
A32
EPO BUS CLOSED
Description
The system is blocked due to the activation of the emergency power off
button.
Possible
causes
Activation of the (local or remote) emergency power off button.
Solutions
1. Release the emergency power off button and reset the alarm.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A33
ASYMMETRIC LOAD
Description
The positive and negative voltages measured on the DC capacitors
towards the middle point are different.
Possible
causes
Possible failure on the measuring circuit.
Possible fault of DC capacitors.
Solutions
1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A34
SERVICE REQUIRED
Description
A UPS check is necessary.
Possible
causes
Possible UPS fault.
Solutions
1. If the alarm persists, contact our Technical Support Service.