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v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the ″Parts Listing″ section in the Hardware Maintenance Manual to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Numeric sensor Planar 12 V going
low (lower critical) has asserted.
Error A lower critical sensor going
low has asserted.
Check the power-supply LED.
Numeric sensor Planar 12 V going
high (upper critical) has asserted.
Error An upper critical sensor
going high has asserted.
Check the power-supply LED.
Numeric sensor Planar VBAT going
low (lower critical) has asserted.
Error A lower critical sensor going
low has asserted.
Replace the 3 V battery.
Numeric sensor Fan n Tach going
low (lower critical) has asserted.
(n = fan number)
Error A lower critical sensor going
low has asserted.
1. Reseat the failing fan n, which
is indicated by a lit LED on
the fan.
2. Replace the failing fan.
(n = fan number)
The Processor CPU nStatus has
Failed with IERR.
(n = microprocessor number)
Error A processor failed - IERR
condition has occurred.
1. Make sure that the latest
levels of firmware and device
drivers are installed for all
adapters and standard
devices, such as Ethernet,
SCSI, and SAS.
Important: Some cluster
solutions require specific code
levels or coordinated code
updates. If the device is part
of a cluster solution, verify
that the latest level of code is
supported for the cluster
solution before you update
the code.
2. Run the DSA program for the
hard disk drives and other I/O
devices.
3. (Trained service technician
only) Replace microprocessor
n.
(n = microprocessor number)
Chapter 8. Troubleshooting 153