Nortel North American DMS-100 Instruction Manual page 59

At the front of the frame
24
At the back of the frame
25
At the PDC
26
At the front of the frame
27
28
29
30
At the front of the frame
31
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Repairing FAN faults on an LCEI frame;
Replace the four 5/16-inch bolts that secure the cooling unit side brackets
(two per side) that you removed in step 11. Secure the brackets in position.
At the back of the cooling unit, reconnect the power plug or power leads
disconnected in step 19.
Reinstall the two fuses (cooling unit 0 or 1) removed in step 18.
DANGER
Risk of personal injury
Electricity can arc when you replace fan unit fuses. Wear eye
protection.
At the front of the cooling unit, reinstall the five 0.5-amp fan fuses (numbered
1 through 5) removed in step 17.
Check the FAN FAIL lamp on the front panel of the cooling unit.
If the FAN FAIL lamp
is off
is on
Reinstall the side trim and secure with the top and bottom screws removed in
step 10.
Go to step 52.
Pull the cooling unit part way out of the frame. The power cord can be too
short to gain access to the front three fans. If the cord is too short, repair the
unit on a bench top.
If the power cord
is too short
is long enough
cooling unit replacement
Do
step 29
step 46
Do
step 17
step 32
1-43
(continued)