PCM faults
Symptom
Cause
Recommended action
Ops panel Module Fault LED is amber
1
Any power fault
Verify that AC mains connections to PCM
are live
Fan Fail LED is illuminated on PCM
2
Fan failure
Replace PCM
1. See
for visual reference of Ops panel LEDs.
2. See
for visual reference of PCM LEDs.
Thermal monitoring and control
The storage enclosure uses extensive thermal monitoring and takes several actions to ensure that component temperatures are kept low,
and to also minimize acoustic noise. Air flow is from the front to back of the enclosure.
Symptom
Cause
Recommended action
If the ambient air is below 25ºC
(77ºF), and the fans increase in
speed, some restriction on
airflow may be causing the
internal temperature to rise.
NOTE:
This symptom is
not a fault condition.
The first stage in the thermal
control process is for the fans to
automatically increase in speed
when a thermal threshold is
reached. This condition may be
caused higher ambient
temperatures in the local
environment, and may be normal
condition.
NOTE:
The threshold
changes according to the
number of disks and
power supplies fitted.
1. Check the installation for any airflow restrictions at either the
front or back of the enclosure. A minimum gap of 25 mm (1") at
the front and 50 mm (2") at the rear is recommended.
2. Check for restrictions due to dust build-up. Clean as
appropriate.
3. Check for excessive recirculation of heated air from rear to
front. Use of the enclosure in a fully enclosed rack is not
recommended.
4. Verify that all blank modules are in place.
5. Reduce the ambient temperature.
Thermal alarm
Symptom
Cause
Recommended action
1. Ops panel Module Fault LED
is amber.
2. Fan Fail LED is illuminated on
one or more PCMs.
Internal temperature exceeds a
preset threshold for the
enclosure.
1. Verify that the local ambient environment temperature is within
the acceptable range. See the technical specifications in the
Dell EMC PowerVault ME4 Series Storage System Owner’s
Manual
.
2. Check the installation for any airflow restrictions at either the
front or back of the enclosure. A minimum gap of 25 mm (1") at
the front and 50 mm (2") at the rear is recommended.
3. Check for restrictions due to dust build-up. Clean as
appropriate.
4. Check for excessive recirculation of heated air from rear to
front. Use of the enclosure in a fully enclosed rack is not
recommended.
5. If possible, shut down the enclosure and investigate the
problem before continuing.
Troubleshooting 5U enclosures
Common problems that may occur with your 5U enclosure system.
The Module Fault LED on the Ops panel, described in
Figure 31. Ops panel LEDs—5U enclosure front panel
, lights amber to indicate a fault
for the problems listed in the following table:
NOTE:
All alarms also report through SES.
Troubleshooting and problem solving
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