1-146 Trouble locating and clearing procedures (continued)
297-8021-544 Standard 14.02 May 2001
Replacing a cooling unit electronic module
CPC A0383326, A0383327, A0383984
(continued)
Replacing a cooling unit electronic module
At your current location
1
Obtain a replacement electronic module for the cooling unit.
At the front of the cabinet
2
Record the cabinet number.
Note: The cabinet number (for example, A10) is on the front of the
cabinet, above the doors.
3
Consult office records or operating company personnel. Determine if power
for the cooling unit connects through a power distribution center (PDC) or a
cabinetized PDC (CPDC).
At the front of the PDC
4
Locate the two cooling unit fuses.
Note: The cooling unit fuse cartridges are on the front panel of the PDC.
The fuse cartridges contain two cooling unit fuses. One fuse is for the A
side power feed. The other fuse is for the B side power feed. The cabinet
number (recorded in step 2) is above each fuse cartridge and the letters
SN CU (SuperNode cooling unit) are below each fuse cartridge.
DANGER
Risk of injury or damage to equipment
When you replace an electronic module for the cooling unit,
do not wear jewelry (for example, rings, bracelets, or
necklaces).
WARNING
Possible equipment damage
Do not remove power to the cooling unit for more than 30
minutes. Extended removal of power can cause the unit to
overheat and cause damage.
If power to the cooling unit
Do
connects through a PDC
step 4
connects through a CPDC
step 6