Avaya 03-300430 User Manual

 

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NONVARIABLE-SPEEDFAN ASSEMBLIES (cont’d): 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

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-/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 a PN’s Maintenance circuit pack.  
Replace the circuit pack.  
Escalate if the problem persists.

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