Trouble locating and clearing procedures (continued) 1-45
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Repairing FAN faults on an LCEI frame;
cooling unit replacement
(end)
Note: A FAN FAIL lamp that turns off indicates a defective sensor switch.
44
Remove the mounting screw from the air flow sensor. Remove and replace
the sensor with a new sensor. Connect the wiring to the new sensor.
45
Repeat steps 42 to 44 until you checked all three accessible sensors, or until
the FAN FAIL lamp turns off.
Note: If the FAN FAIL lamp remains ON, the fault can lie in the two back
fans or air flow sensors. In this event, remove the cooling unit from the
frame and replace the unit with a new unit. If your company procedures
direct you to repair damaged units in-house, refer to "Repairing a
NTBX63AA cooling unit" in this document.
46
Contact the next level of support.
47
Go to step 52.
48
Push the cooling unit back into the frame.
At the back of the frame
49
Replace the three mounting screws at the back center of the cooling unit
removed in step 12. Secure the screws in position.
At the front of the frame
50
Replace the four 5/16-inch bolts that secure the cooling unit brackets (two per
side) removed in step 11. Secure the bolts in position.
51
Reinstall the side trim and secure the trim with the top and bottom screws
removed in step 10.
52
The procedure is complete.
remains on
step 45
If the FAN FAIL lamp
Do
turns off
step 48
remains on
step 45
If the FAN FAIL lamp is
Do
off
step 48
on
step 17
If the FAN FAIL lamp
Do
