Emerson MPR15 Series - Manual (Page 74)

74 Maintenance
UM5C06B / C ( 169-2071-500 ) P0711722 Standard 10.00 May 2001
Filter
If the unit operates in a dusty environment the optional fan filter is
recommended. It must be inspected and replaced, or thoroughly cleaned, at
least every 12 months.
CAUTION
Do not install a wet filter in the unit.
To remove the filter, simply unscrew it. Re-install it by reversing the
operation.
Fan cooling
Visually inspect the intake of the airflow for any obstruction by foreign
objects or excessive dust and dirt build-up. Open both the DC and AC
breakers (toggle them to OFF) and remove the unit from the power shelf.
Inspect the air outlet for obstruction by foreign objects. Visually inspect the
air outlet of the enclosure or cabinet. If a problem is detected in the rectifier,
contact your local Astec service facility. The unit must not be opened for on-
site servicing.
DANGER
Do not attempt to access the inside of the unit with a
tool or finger. Severe electrical shock could result.
Storage
The rectifier contains aluminum electrolytic capacitors. For this reason, the
rectifier must be in operation. If not in operation, once a year, the equipment
must be energized for at least two hours to maintain the electrolytic
capacitors in working condition.
Power shelf
The rectifier shelf requires no maintenance.