3-3
MAINTENANCE
Service Manual
Figure 3-2 Air Filter Removal
Removal, Cleaning and Replacement of the Cooling Air Filter
Powermax900 systems are normally shipped without air filters. If your Powermax900 has the air filter
option, it will need periodic cleaning. Excessively dirty or dusty environments can block the cooling
air filter (if installed) and cause the power supply to overheat and shut down.
WARNING
SHOCK HAZARD: Always turn off power and unplug cord from wall and wait 5
minutes before removing any power supply cover. If power supply is directly con-
nected to a line disconnect switch, place line disconnect switch to OFF position. In
the U.S., use a "lock-out / tag-out" procedure until the service or maintenance work is
complete. In other countries, follow appropriate local or national safety procedures.
Cooling Air Filter
4. Clean the air filter with either soap and water or with low pressure compressed air.
5. Replace the dry filter in the power unit with the wire mesh facing the fan.
6. Replace and re-fasten the power supply cover with the existing screws.
1. Turn the Powermax900 power switch to the OFF (0) position, unplug the power cable
from the wall receptacle and disconnect the gas supply.
2. Remove the screws that secure the power supply cover to the chassis.
3. Remove the cover, and remove the cooling air filter from the clips by sliding the filter to the
left and then up - Fig. 3-2. See
Powermax900 Field Upgrade Kits and Optional Parts
in
Section 4 for part number information.
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