Hitemp; Hldoversync - Cisco ONS 15327 User Documentation

Alarm Procedures

14.4.61 HITEMP

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The equipment failure high temperature (HITEMP) alarm means the temperature of the ONS 15327 is
above 50 degrees Celsius (122 degrees Fahrenheit).
Caution Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband
cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
Procedure: Clear the HITEMP Alarm
Check the temperature of the ONS 15327 on the front panel LCD.
Step 1
Check that the temperature of the room is not abnormally high.
Step 2
Ensure that nothing prevents the fan-tray assembly from passing air through the ONS 15327.
Step 3
Ensure that blank faceplates fill the ONS 15327 empty slots. Blank faceplates help airflow.
Step 4
Check the condition of the air filter to see if it needs replacement.
Step 5
Step 6 If the filter is clean, take the fan-tray assembly out of the ONS 15327.
Reinsert the fan tray, making sure the back of the fan tray connects to the rear of the ONS 15327.
Step 7
Note
If the fan does not run or the alarm persists, replace the fan tray.
Step 8
If the replacement fan tray does not operate correctly, login to http://www.cisco.com/TAC for more
Step 9
information or call the Cisco Technical Assistance Center to report a service-affecting problem
(1-800-553-2447).

14.4.62 HLDOVERSYNC

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Loss of the primary/secondary timing reference raises the holdover synchronization mode
(HLDOVERSYNC) alarm. Timing reference loss occurs when line coding on the timing input is
different from the configuration on the ONS 15327. It also usually occurs during the selection of a new
node reference clock. This alarm indicates that the ONS 15327 has gone into holdover and is using the
ONS 15327 internal reference clock, which is a Stratum 3-level timing device. The alarm clears when
primary or secondary timing is reestablished.
Procedure: Clear the HLDOVERSYNC Alarm
Check for additional alarms that relate to timing.
Step 1
Cisco ONS 15327 User Documentation, R3.3
14-46
Critical, Service-Affecting (NE)
Minor, Non-Service-Affecting (EQPT)
The fan should run immediately when correctly inserted.
Major, Service-Affecting
Chapter 14 Alarm Troubleshooting
June 2002