1-48 Trouble locating and clearing procedures (continued)
297-8021-544 Standard 14.02 May 2001
Repairing an NTBX63AA cooling unit on the bench top
(continued)
Repairing an NTBX63AA cooling unit on the bench top
At your current location
1
Place the NTBX63AA cooling unit that has faults on a bench.
2
Check the five fuses at the front of the unit and replace any blown fuses
3
Connect the unit to an acceptable 48 V dc power supply.
4
Inspect the fan operation.
5
Inspect the unit wiring harness for damage or loose switch connections.
ATTENTION
The cooling unit configuration in the frame can differ from the following
description. If you encounter an important difference, contact your next level
of support.
WARNING
Incorrect fuse values
Always use replacement fuses of the correct rating, or
damage to the equipment can result.
WARNING
Temporary power supply
Ensure that you have an acceptable power supply to run the
unit without damage.
If the fans
Do
work correctly
step 21
do not work correctly
step 5
If the harness
Do
is damaged or loose
step 6
is not damaged or loose
step 6