Trouble locating and clearing procedures (continued) 1-73
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Repairing and replacing NT3X90AB cooling units
(end)
At the PDC frame
64
Remove the fuses that power the inverter cards.
At the back of the cooling unit
65
Disconnect the plug that connects the wiring to the cooling unit.
At the front of the cooling unit
66
Remove the screws that secure the side rail covers to the frame.
67
Remove the eight screws that secure the brackets to the sides of the cooling
unit. To remove the screws, use a 5/16-inch ratchet and extension.
68
Ease the cooling unit toward you and out of the frame.
69
Ease the replacement cooling unit into the frame.
70
Secure the brackets to the sides of the cooling unit. To secure the brackets,
use a 5/16-inch ratchet and extension.
71
Reinstall the side rail on the front of the frame.
At the back of the cooling unit
72
Reconnect the plug that connects the wiring to the cooling unit.
At the PDC frame
73
Insert the fuses that power the inverter cards.
At the front of the cooling unit
74
Locate the toggle switches near the back right corner of the inverter cards.
75
Make sure you turn ON the toggle switches.
76
Reinstall the air intake grill and filter assembly at the front of the cooling unit.
77
Turn ON the FAN FAIL OVERRIDE switch on the FSP.
78
For additional help, contact the next level of support.
79
The procedure is complete.
WARNING
Loss of frame cooling
Do not leave a cooling unit that has faults in the frame. If you
cannot repair the cooling unit immediately, replace it with a
cooling unit that works correctly. Go to step 64 and follow
the necessary parts of the procedure.
