0302 - Cooling Fan Failure

The cooling fan hardware is not working.

Example

RLGHNCXA21W 00-02-07 11:02:30 EST  EAGLE 35.0.0
*  0100.0302  *  SYSTEM       Cooling fan failure

Alarm Level: Minor

Recovery

1. At the fan assembly, verify that the Fan Switch on the grill panel is in the ON position.
2. At the FAP, verify the fuses for the fan assembly.
   The fuse card will be marked FAN A and FAN B, fuse positions 6, 12, and 18 (A and B). Fuse position 6 is for the fan unit directly below the control shelf. Fuse position 12 is for the fan directly below the 1200 shelf. Fuse position 18 is for the fan directly below the 1300 shelf. All fans are to be fused at 2 amps (with orange flags) per feed.
3. At the EAGLE 5 ISS terminal, enter the following command to verify that the fan feature is turned on.
   rtrv-feat

   Note:

   Once you have turned on the feature, you cannot turn it off. The feature applies to any and all fans installed within the system. When replacing a fan assembly, the feature should already be turned on.
   The output displays a list of optional features and their status on the system.

   RLGHNCXA03W 99-01-28 11:34:04 EST EAGLE 35.0.0
   EAGLE FEATURE LIST
   GTT = off
   GWS = on
   CRMD = off
   X25G = on
   LAN = on
   SEAS = on
   LNP = off
   LNP12MIL = off FAN = on
   DSTN4000 = on
   WNP = on
   CNCF = on
   SCCPCNV = on
   TCAPCNV = on
   TLNP = on
   x252000 = on

4. If FAN = on does not appear in the output, enable the fan feature by entering the following command:
   chg-feat:fan=on
   After the program updates, the system returns output similar to the following:

   RLGHNCXA03W 97-03-11 11:34:04 EST EAGLE 35.0.0
   CHG-FEAT: MASP A - COMPLD

5. At the rear of the frame, verify the A power cable from the A fan assembly is securely attached.
6. At the rear of the frame, verify the B power cable from the B fan assembly is securely attached.
7. At the EAGLE 5 ISS terminal, type in this command:
   rept-stat-trbl
   If the EAGLE 5 ISS reports the following alarm, replace the cooling fan.

   302 COOLING FAN FAILURE

   Refer to the Maintenance Manual for card removal/replacement procedures.