TP-6487 8/0722 Section 3 Scheduled Maintenance
3.4 Service Schedule
Follow the service schedule below for the recommended service intervals. Activities designated by an X may be
performed by the switch operator. Have all other maintenance and service performed by an authorized
distributor/dealer.
System Component or Procedure
See
Section
Visually
Inspect
Check
Adjust,
Repair,
Replace
Clean Test Frequency
Electrical System
Check for signs of overheating or loose
connections: discoloration of metal, melted
plastic, or a burning odor
3.3.1 X X Y
Check the operating mechanism for cleanliness;
clean if dirty *
3.3.1 D D Y
Control System
Exercise the generator set under load 2.8 X W
Test the transfer switch’s automatic control
system
2.7 X X M
Test all indicators (LEDs) and all remote control
systems for operation
2.2 D D D D Y
General Equipment Condition
Inspect the outside of the transfer switch for any
signs of excessive vibration, leakage, high
temperature, contamination, or deterioration *
3.3.1 X X M
Check that all external hardware is in place,
tightened, and not badly worn
3.3.1 X X X M
Open the door and inspect for any signs of
excessive vibration, leakage, high temperature,
contamination, or deterioration *
3.3.2 D D D Y
* Service more frequently if the transfer switch is operated in dusty or dirty areas.
See Section: Read these sections carefully for additional information before attempting maintenance or service.
Visually Inspect: Examine these items visually.
Check: Requires physical contact with or movement of system components, or the use of nonvisual indications.
Adjust, Repair, Replace: Includes tightening hardware. May require replacement of components depending upon the
severity of the problem.
Clean: Remove accumulations of dirt and contaminants from external transfer switch’s components or enclosure with a
vacuum cleaner or by wiping with a dry cloth or brush. Do not use compressed air to clean the switch because it can cause
debris to lodge in the components and cause damage.
Test: May require tools, equipment, or training available only through an authorized distributor/dealer.
Symbols used in the chart:
X=The transfer switch operator can perform these tasks.
D=An authorized distributor/dealer must perform these tasks.
W=Weekly
M=Monthly
Q=Quarterly
S=Semiannually (every six months)
Y=Yearly (annually)
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