INTRODUCTION
7 - 1
SECTION 7 - MAINTENANCE
INTRODUCTION
The reliability of any stand-alone product or control system is
affected by the maintenance of the equipment. ABB recommends
that all equipment users practice a preventive maintenance pro-
gram that will keep the equipment operating at an optimum level.
Maintenance personnel should be familiar with the Type AV posi-
tioner and have experience working with process control applica-
tions that use pneumatic positioners.
PREVENTIVE MAINTENANCE SCHEDULE
Table 7-1 is the preventive maintenance schedule and checklist
for Type AV positioners. The table lists the preventive mainte-
nance tasks in groups according to their specified maintenance
interval. The maintenance intervals are recommendations and
may vary depending on the location environment and the air qual-
ity of the positioner. As a minimum, these recommended mainte-
nance tasks should be performed during an extended process
shutdown.
Some tasks in Table 7-1 are self-explanatory. Instructions for tasks
that require further explanation are covered under PREVENTIVE
MAINTENANCE PROCEDURES.
WARNING
System maintenance must be performed only by qualified
personnel and only after securing the equipment controlled
by the circuit. Altering or removing components from an
active circuit may upset the controlled process leading to
personnel injury and equipment damage.
Table 7-1. Preventive Maintenance Schedule
Preventive Maintenance Tasks
Interval
(months)
Check and tighten all wiring connections.
12
Clean or replace supply air filter.
Clean or replace manifold filters. Refer to procedure.
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