Chapter 5: Troubleshooting
Diagnostic Steps
QX and QXS Setup Guide
137
Is the Fan Control Module “Fault/Service Required” LED Amber?
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Yes
The power supply unit or a fan
is operating at an
unacceptable voltage/RPM
level, or has failed.
When isolating faults in the power supply, remember that the fans in
both modules receive power through a common bus on the
midplane, so if a power supply unit fails, the fans continue to operate
normally.
l
Verify that the FCM FRU is firmly locked into position.
l
Verify that the power cable is connected to a power source.
l
Verify that the power cable is connected to the chassis power
supply unit.
Table 21:
Diagnostics LED status: Rear panel fan control module “Fault/Service Required”
Is the Power Supply’s “Input Power Source” LED Off?
Answer
Possible reasons
Actions
No
System functioning
properly.
No action required.
Yes
The power supply is not
receiving adequate power.
l
Verify that the power cord is properly connected, and check the
power source to which it connects.
l
Check that the power supply FRU is firmly locked into position.
l
Check the event log for specific information regarding the fault.
l
If the above action does not resolve the fault, isolate the fault and
contact an authorized service provider for assistance.
Table 22:
Diagnostics LED status: Rear panel Power Supply “Input Power Source”
Is the “Voltage/Fan Fault/Service Required” LED Amber?
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Table 23:
Diagnostics LED status: Rear panel Power Supply “Voltage/Fan Fault/Service Required”