UPS user manual
Utilizzo dell’UPS
44
OMD10082 REV. F
Alarm
A25
INVERTER OFF
Description
The inverter is blocked due an operation failure.
Possible
causes
Various.
Solutions
1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A26
COMMUNIC ERROR
Description Internal
error.
Possible
causes
Microcontroller communication problems.
Solutions
1. If the alarm persists, contact our Technical Support Service.
Alarm
A27
EEPROM ERROR
Description
The controller has detected an error in the parameters stored in
E
2
PROM.
Possible
causes
Wrong parameters entered during programming.
Solutions
1. Contact our Technical Support Service.
Alarm
A28
CRITICAL FAULT
Description
An alarm has been activated which causes the shutdown of part of the
UPS (rectifier, inverter, static switch).
Possible
causes
System failure.
Solutions
1. Check which alarms are present and carry out the indicated
procedures.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A29
MAINTENANCE REQ
Description
It is necessary to carry out maintenance work.
Possible
causes
The time limit since the last maintenance work has elapsed.
Solutions
1. Contact our Technical Support Service.