IBM 3745 Problem Determination Manual page 51

ALARM 90: CCU-x POWER SUPPLY DOWN hhmmss ref code
Cause:
Power supply
Action:
• Restore power supplies using the Power Services function (POS).
Refer to the 3745 Advanced Operations Guide.
• If the problem persists,
CO
and
~ive referenc~
code.
ALARM 95: FIRST TEMPERATURE THRESHOLD REACHED ON CCU-x
Cause:
Action:
Air filter _
Thermal detector
Cooling fan
Power supply
Power control
hhmmss ref code
• Check that ~ir vents are not obstructed and that the room temperature is correct.
• Check for dirty filter.
• If the problem persists,
CO
and give reference code.
ALARM 96: POWER SUBSYSTEM: CCU POWER SUPPLY OVERHEATING
Cause:
Action:
Power s-upply
Power control
CO
and give reference code.
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IBM 3745 Communication Controller: Problem Determination Guide
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