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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 Chapter 7, “Parts listing, ThinkServer RD220 Type 3729, 3779, 3797, and 3798,” on page 231 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.
System event/error log message Action
CPU n IERR, the CPU has been disabled
n = the microprocessor number
1. (Trained service technician only) Reseat microprocessor n.
2. (Trained service technician only) Replace microprocessor n.
3. (Trained service technician only) Replace the system board.
CPU n over temperature
n = the microprocessor number
1. Make sure that the fans are operating, that there are no
obstructions to the airflow, that the air baffles are in place and
correctly installed, and that the server cover is installed and
completely closed.
2. Make sure that the heat sink for microprocessor n is installed
correctly.
3. (Trained service technician only) Replace microprocessor n.
CPU removal detected Information only. Take action as appropriate.
CPU n non-critical over temperature warning
n = the microprocessor number
1. Make sure that the fans are operating, that there are no
obstructions to the airflow, that the air baffles are in place and
correctly installed, and that the server cover is installed and
completely closed.
2. Make sure that the heat sink for microprocessor n is installed
correctly.
CPU n non-recoverable over temperature fault
1. Make sure that the fans are operating, that there are no
obstructions to the airflow, that the air baffles are in place and
correctly installed, and that the server cover is installed and
completely closed.
2. Make sure that the heat sink for microprocessor n is installed
correctly.
3. (Trained service technician only) Replace microprocessor n
4. (Trained service technician only) Replace the system board.
VRD 1 critical over voltage fault
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace the system board.
VRD 1 critical under voltage fault
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace the system board.
VRD 2 critical over voltage fault
VRD 2 = VRM
1. Reseat the VRM.
2. (Trained service technician only) Reseat microprocessor 2.
3. (Trained service technician only) Replace the system board.
VRD 2 critical under voltage fault
VRD 2 = VRM
1. Reseat the VRM.
2. (Trained service technician only) Reseat microprocessor 2.
3. (Trained service technician only) Replace the system board.
Processor VTT Power Fault.
1. (Trained service technician only) Reseat microprocessor 1.
2. (Trained service technician only) Replace the system board.
142 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual