Wärtsilä JOVYSTAR COMPACT M
BAX 5480
- 79 -
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.
Alarm
A21
THERMAL IMAGE
Description
The thermal image protection has been activated after an extended inverter
overload. The inverter is shut down for 30 minutes and then restarted.
Possible
causes
Output overload.
Measuring circuit failure.
Solutions
1. Check the loads connected to the UPS output.
2. Should you need to restore the inverter supply immediately, reset the system.
3. If the alarm persists, contact our Technical Support Service.
Alarm
A22
BYPASS SWITCH
Description
The “Normal/Bypass” selector has been operated.
Possible
causes
Maintenance operation.
Solutions
1. Check the selector position.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A23
EPO PRESSED
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
A24
HIGH TEMPERATURE
Description
High temperature of the heat sink on the inverter bridge or tripping of the DC fuses
which protect the inverter bridge.
Possible
causes
Fault of the heat sink cooling fans.
The room temperature or cooling air temperature is too high.
Tripping of the DC protection fuses.
Solutions
1. Check the fans operation.
2. Clean the ventilation grids and the air filters, if any.
3. Check the air conditioning system (if present).
4. Check the status of the DC fuses on the inverter bridge input.
5. If the alarm persists, contact our Technical Support Service.