Lenovo THINKSERVER 3821 User Manual

Page 57

Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.

See Chapter 8, “Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823,” on page 237 to
determine which components are customer replaceable units (CRU) and which components are field
replaceable units (FRU).

If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.

Sensor Pwr Rail F Fault has
transitioned to non-recoverable.

Error

A sensor has changed to
Nonrecoverable state.

1. Turn off the server and

disconnect it from power.

2. Remove the hard disk drives

and the hard disk drive
backplanes.

3. Restart the server.

4. Reinstall each device, one at

a time, starting the server
each time to isolate the failing
device.

5. Replace the failing device.

6. (Trained service technician

only) Replace the system
board.

Sensor PS n Therm Fault has
transitioned to critical from a less
severe state.
(n = power supply number)

Error

A sensor has changed to
Critical state from a less
severe state.

1. Make sure that there are no

obstructions, such as bundled
cables, to the airflow from the
power-supply fan.

2. Replace power supply n.

(n = power supply number)

Sensor PSn 12V OV Fault has
transitioned to non-recoverable.
(n = power supply number)

Error

A sensor has changed to
Nonrecoverable state.

1. Check the power-supply LED

2. Remove the power supplies.

3. Replace power supply n.

4. (Trained service technician

only) Replace the system
board.

(n = power supply number)

Sensor PSn 12V UV Fault has
transitioned to non-recoverable.

Error

A sensor has changed to
Nonrecoverable state.

1. Check the power-supply LED

2. Remove the power supplies.

3. Replace power supply n.

4. (Trained service technician

only) Replace the system
board.

(n = power supply number)

Chapter 5. Diagnostics

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