Recovering from an Overheated Power Supply
$DEV_NAME, has been selected.
To prepare for this service action, perform the following:
Enter a description of the service action (recovering a from a overheated power supply).
Select the estimated amount of time of the service action from the pull-down.
Select the Reserve button.
a) Other users will be alerted that this service action is in progress when they login.
To Recover from an Overheated Power Supply
If needed, to help locate the CRM/CEM , activate the White Locate LED:
If the internal temperature of the tray(s) rises above 70°C (158°F), one or both of the power supplies automatically shut down. If "one" power supply shuts down the Service Action Required LED will be "On".
a) View the Service Action Required LED location illustration.
Alarm notification will occur for both the Nominal and Maximum temperatures being exceeded.
Determine if any of the following conditions have caused the power supplies to overheat:
- Unusually high room temperature.
- Fan failure in the power-fan assembly.
- Defective power-fan assembly.
- Blocked air vent.
- Failure in other devices in the cabinet.
Try to alleviate the overheating problem by doing the following:
- Removing all panels from the cabinet. This will help prevent possible damage to the tray(s).
- Cooling the area using external fans.
- Shutting down the power to the tray and to all attached drive tray(s).
Important: Make sure all I/O activity to the trays has been stopped before powering down any equipment.
Wait until the ambient air temperature around the trays cools down.
The trays are capable of power-up recovery without operator intervention after the temperature inside the power-fan assembly cools to below 70°C (158°F). After the air has cooled, the power supplies should turn "On" automatically. If the power supplies restart automatically, the controllers/IOMs reset and return to normal operation.
If the power supplies didn't restart automatically turn Off the power switch on each controller/IOM in the tray(s). Wait 10 seconds, and then turn On the power to the tray.
If the power supplies power "On" check the LEDs on the front and rear of the tray.
If the tray(s) haven't powered "On" contact your Sun Service provider or your next level of technical support.
Verify the State and Status of the tray(s):
a) Verify that the tray(s) are ready for operation.
b) The "State" should be "Enable" and the "Status" should be "OK" for all FRUs.
If there are any failed FRUs proceed to the appropriate removal / replacement procedures.
If the problem has not been resolved contact your Sun Service provider or your next level of technical support.
Turn Off the White locate LED used to locate the CRM/CEM.
Disable the reserve CRM/CEM function.
a) Select the Release button.