ABB PQFA Instruction Manual page 96

12.Maintenance
Although your PQFA has been designed for minimum maintenance, the
following procedure should be carefully followed to insure the longest possible
life to your investment.
WARNING!
All maintenance work described in this chapter should only be undertaken by
a qualified electrician. The Safety Instructions section of this manual must be
thoroughly followed.
12.1. Maintenance frequency
Under normal working conditions and environment, maintenance every six
months is recommended.
In case of installation in a dirty or sandy environment, a more frequent
maintenance programme should be implemented.
12.2. Maintenance procedure
Step 1 Shut the filter down by pushing the ' RESET' button of the door
cubicle.
Open the auxiliary circuit breaker.
Wait at least 5 minutes for the discharge of DC capacitors.
Step 2 Cleaning
All dust deposits have to be removed from all parts, especially
the heatsink and fan.
Indeed,the heatsink picks up dust from the cooling air and The
PQFA might run into overtemperature faults if the heatsink is not
cleaned regularly.
Step 3 Check breakers condition
Step 4 Check tightness of all electrical connections
Step 5 Check condition of discharge resistor on power modules
Asea Brown Boveri Jumet S.A.
PQFA Instructions Manual
96