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Table 15. Power system problem indications, solution 1 (Continued)
No AC Power to the Power Supplies
Action
Table 16. Power system problem indications, solution 2
AC power is present, but no DC output
Problem Summary
Probable Cause
Action
Table 17. Power system problem indications, solution 3
AC Power is present, but the SAN256N director does not power up
Problem Summary
Probable Cause
Action
Cooling system troubleshooting
Indications of problems with the cooling system may come from five sources:
• Fan Status indicators on the Upper and Side fan assemblies.
• Sys Fan LED on TCM.
• FAN OK indicator on TCM.
• The 16-character scrolling display near the bottom of the TCM board.
• The Enterprise Manager alarm log.
Cooling system problem indications and solutions
The following is a list of possible problem indications, descriptions of the problems, a
probable cause, and an action to take.
114
SAN256N Director 2045-N16
Verify that all circuit breakers are set to On, the power cords
are plugged in to the right receptacles, and the power cords
are fully plugged into the power supplies. If everything is set
up properly, disconnect the SAN256 from the customer's
power receptacles, and verify that the power cords,
receptacles, and circuit breakers are OK. If a problem is
found, replace the component.
AC power is available. AC LED is lit red. DC LED is not lit.
Enterprise Manager indicates "AC Fail".
AC input power is less than 190V, or the power supply is
faulty.
Verify that the AC input voltage from the customer's power
receptacles for the SAN256 is between 200 VAC to 240
VAC. If the voltage is within range, replace the power
supply.
AC power is available. AC LED is lit green. DC LED is lit
red. Enterprise Manager indicates DC Fail.
DC power switch is Off, or the power supply is faulty.
Verify that the DC power switch is On. If the switch is On
and the supply does not operate, replace the power supply.
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Troubleshooting
