User's Manual

Monitoring and Troubleshooting
P/N 709C011801
Page 128
The following table provides the descriptions for the ACM Alarms. Alarms that are specific for the HEU or the OIU ACM module
are indicated as such.
Device Alarm Description
Inconsistent Versions Indicates that the module does not have the defined active release
Over Temperature
Ambient temperature inside the ACM is > 75
◦
C
HW Failure Indicates ACM faulty HW upon initialization or during operation
Configuration Mismatch Unsuccessful adjustment procedure for the selected module
All PSM Temperature
Indicates that the temperature of either one (Severity – minor) or both (Severity –
Major) of the PSM modules is > + 100°C. Refer to Power Alarms to check which
PSM module has generated the alarm.
Output Under Voltage
Indicates that the ACM has detected an input voltage value < 10.8V DC from either
one of the PSM modules (Severity – minor) or both (Severity – Critical) during 3
consequent samplings. Refer to Power Alarms to check which PSM module has
generated the alarm
Input Under Voltage
Indicates that the ACM has detected an input voltage value of < 60V AC from
either one PSM module (Severity – minor) /both PSM modules (Severity – Critical).
Refer to Power Alarms to check which PSM module has generated the alarm.
(HEU-ACM) Ext1/Ext2
Clock Failed
Indicates failure in master reference clock
(OIU-ACM) Pilot Clock
Failed
Indicates failure in reference in the pilot clock in the OIU Expander
Overall Status Overall status of enabled (unmasked) alarms
Table 9-4. ACM Power Alarms Descriptions