Nortel DMS 100 Series Maintenance Manual page 349

Cooling unit replacement
At your current location
1
To make sure the cooling unit fans are off, place the power switch on the
cooling unit in the off position.
2 Turn the two knobs on the front panel of the cooling unit counterclockwise and
slide the cooling unit to remove the cooling unit.
3 Replace the cooling unit with the same part number as that of the old unit.
Slide the new cooling unit to replace the cooling until both sides lock in place.
4 To power up the cooling unit, place the power switch on the cooling unit in the
on position.
5 This procedure is complete.
DMS-100 Family Remote Switching Center Multi-Access Maintenance Manual XPM11 and up
RSC-M routine maintenance procedures
Cooling unit replacement
DANGER
To prevent overheating
Do not leave the cooling unit fans off for longer than 30 min.
12-7
(end)