Fault Leds On The Back Of The Drive Module - IBM F10 Service Manual

Figure 98. Fault LEDs on the Back of the Drive Module
3. Shut down the drive module immediately.
Do not run the drive module if both fan FRUs have failed. Stop all activity to the
drive module and turn off both power switches. Go to Step 5.
4. Answer the following questions.
Can you hear the motors running in both fan FRUs?
v Yes. Go to the next question.
v No. Place your hand in front of both sets of air vents on each fan FRU and
see if you can feel air blowing against your hand. If you can feel air exiting
through both sets of vents, the fan FRUs are probably working correctly.
Answer the next question. If you cannot feel air exiting through one or more
vents on either fan FRU, go to Step 5.
Is the Fault LED on the ESM FRU lit?
v Yes. This indicates that the ambient air temperature may have risen above
(40°C [104°F]). Check the air temperature around the drive module. If it is too
hot, take necessary steps to cool the area around the drive module. If the
temperature is within the required operating range, there may be a defective
LED on the ESM FRU. Go to "Replace a Failed ESM FRU" on page 170.
v No. If the operating system or host software is reporting a fan or over-temp
error, yet you cannot detect a problem, the ESM board or midplane may be
malfunctioning. Go to "Replace a Failed ESM FRU" on page 170.
5. Unpack the replacement fan FRU.
6. Remove the failed fan FRU (Figure 99 on page 190).
Chapter 13. Servicing the Cooling System
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