Cem+ Fuses - ETC sensor+ CEM+ Configuration Manual

C E M + F u s e s
The CEM+ has two fuses:
• The F1 fuse is a 250V, 0.75 amp, fuse. CEM+ operating power and power for the
dimmer module electronics, is drawn through this fuse. If F1 fails, the CEM+ will not
operate and dimming will not work. The Sensor+ rack beacon will be dark. The fuse in
the F2 position is a spare 0.75 amp fuse.
• Phase F3 fuse is a 250V, 5 amp fuse. Power for the rack's fan is drawn through this
fuse. If F3 fails, the fan will stop running and the CEM+ will display an air flow error. The
Sensor+ rack beacon will flash to signal a problem. The rack may shut down due to
overheating. The fuse in the F4 position is a spare 5 amp fuse.
Replacing a Fuse:
Step 1:
Step 2:
Step 3:
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Remove the CEM+ module (See
Locate and replace the defective fuse. Fuses are held in vertical fuse holders.
a: Use a flat-blade screwdriver to gently turn the cap of the fuse holder to the
left until it comes free.
b: Lift the cap and the fuse straight out of the fuse holder.
c: Remove the defective fuse and replace it with a fuse of the same type. A
spare fuse of each type is provided on the CEM+.
d: Replace the fuse and cap in the fuse holder and use a flat-blade screwdriver
to gently turn the cap to the right to fully capture the fuse.
Fuse - 5A - Spare
Fuse - 5A - Fan Power
Replace the CEM+ module and close the door.
Changing Installation Rack Modules, page
Fuse - .75A - CEM+ and
Module Electronics
Fuse - .75A - Spare
Sensor+ Dimming System User Manual
46).