IBM 3745 Problem Determination Manual page 27

ALARM 22: HARDWARE ERROR: CCU-x FALLBACK OR IPL FAILED
hhmmss ref code
Cause: CCU
Action:
Processor switches
Main storage
co
and give the reference code and the reference codes of the preceding alarms
related to this one. To display the alarms, use the Event Log Display (ELD) function. Refer
to the 3745 Advanced Operations Guide.
ALARM 23: HARDWARE ERROR: FALLBACK COMPLETE ON CCU-x hhmmss ref code
Cause: CCU
Action:
Main storage
A problem occurred on one CCU in a twin-backup confi.guration. Fallback was successful on
the other CCU.
• Resume operations on backup physical unit (PU) and perform problem determination
procedures.
co
and give the reference code and the reference codes of the preceding alarms
related to this one. To display the alarms, use the Event Log Display (ELD) function.
Refer to the 3745 Advanced Operations Guide.
ALARM 24: HARDWARE ERROR: CCU-x RE-IPL IN PROGRESS
hhmmss ref code
Cause: CCU
Main storage
Action: If the problem persists or occurs repeatedly,
CO
and give reference code.
ALARM 25: HARDWARE ERROR: CCU-x RE-IPL FAILED hhmmss ref code
Cause: CCU
Main storage
Action:
CO
and give reference code along with the reference code of the previous re'lated
alarm.
1-10
IBM 3745 Communication Controller: Problem Determination Guide
a
/-~
~c)
o