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 3, “Parts listing,” on page 23 to determine which components are CRUs and which components
are FRUs.
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Symptom Action
A blower module is not
working.
1. Make sure all power cords are plugged into 220-Volt power sources and that
the power sources are working.
2. Reseat the blower module.
3. Replace the blower module.
Fan pack problems
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 3, “Parts listing,” on page 23 to determine which components are CRUs and which components
are FRUs.
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Symptom Action
A fan pack is running at full
speed.
1. Make sure that at least one management module is installed, and it is active
and working.
2. Reseat the following components:
a. Power module.
b. Fan pack
1
3. Replace the fan pack
1
1
2900W power modules with removable fan pack only. If the unit is equipped
with 2980W power modules, reseat or replace the power module.
I/O module problems
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 3, “Parts listing,” on page 23 to determine which components are CRUs and which components
are FRUs.
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Symptom Action
An I/O module will not turn
on.
1. Make sure that at least one management module is installed, and it is active
and working.
2. Reseat the I/O module.
3. Replace the I/O module.
Cannot communicate with the
external ports on an I/O
module.
1. Make sure that external ports option is enabled in the management module
Web interface.
2. Reseat the I/O module.
3. Replace the I/O module.
Chapter 2. Diagnostics 13
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