CABINET (Cabinet Sensors)
Issue 1 May 2002
8-391555-233-143
1
(cont’d)
FAIL
(cont’d)
NONVARIABLE-SPEEDFAN ASSEMBLIES (continued): If the fans are
running at high speed, check the following items, any of which can restrict or
redirect airflow within the cabinet.
1. Check both filters. If a filter is dirty or clogged, clean with soapy water or a
vacuum.
2. Ensure that there is nothing other than circuit packs in the carrier slots that
could be restricting the airflow.
3. Ensure that there are no missing circuit-pack faceplates or blanks.
4. The cabinet door must be closed for proper cooling.
5. Wait 5 minutes for the cabinet to cool and rerun the test.
6. If the test fails, check temperatures for the 15
0
-/50
0
-C criteria. If the
15
0
-/50
0
-C criteria is present, then the fans should be running at high
speed.
7. Wait 5 minutes, and rerun the test.
8. If the test still fails, then the ambient room temperature is probably too
high. Cool the room.
9. If the 15
0
-/50
0
-C criteria does not exist, one of the following components if
defective:
■ AHD1 circuit pack
■ fans
■ S3 sensors
■ S4 sensors
Replace these items one at a time in the order listed, running the test after
each replacement. If many environmental tests are failing, it can be a
problem that is undetected by maintenance on an EPN’s Maintenance
circuit pack. Replace the circuit pack. Escalate if the problem persists.
Table 8-162. Test #122 Cabinet Temperature Query Test — Continued
Error
Code
Te s t
Result Description / Recommendation
Continued on next page
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