Kohler Decision-Maker MPAC 750, Operation

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TP-6865 4/14 32 Section 5 Scheduled Maintenance
Grounding electrical equipment. Hazardous voltage can
cause severe injury or death. Electrocution is possible
whenever electricity is present. Ensure you comply with all
applicable codes and standards. Electrically ground the
generator set, transfer switch, and related equipment and
electrical circuits. Turn off the main circuit breakers of all
power sources before servicing the equipment. Never contact
electrical leads or appliances when standing in water or on wet
ground because these conditions increase the risk of
electrocution.
Servicing the transfer switch. Hazardous voltage can
cause severe injury or death. Deenergize all power sources
before servicing. Turn off the main circuit breakers of all
transfer switch power sources and disable all generator sets
as follows: (1) Move all generator set master controller
switches to the OFF position. (2) Disconnect power to all
battery chargers. (3) Disconnect all battery cables, negative
(--) leads first. Reconnect negative (--) leads last when
reconnecting the battery cables after servicing. Follow these
precautions to prevent the starting of generator sets by an
automatic transfer switch, remote start/stop switch, or engine
start command from a remote computer. Before servicing any
components inside the enclosure: (1) Remove all jewelry. (2)
Stand on a dry, approved electrically insulated mat. (3) Test
circuits with a voltmeter to verify that they are deenergized.
Short circuits. Hazardous voltage/current can cause
severe injury or death. Short circuits can cause bodily injury
and/or equipment damage . Do not contact electrical
connections with tools or jewelry while making adjustments or
repairs. Remove all jewelry before servicing the equipment.
NOTICE
Electrostatic discharge damage. Electrostatic discharge
(ESD) damages electronic circuit boards. Prevent
electrostatic discharge damage by wearing an approved
grounding wrist strap when handling electronic circuit boards
or integrated circuits. An approved grounding wrist strap
provides a high resistance (about 1 megohm), not a direct
short , to ground .
5.2 Testing
5.2.1 Weekly Generator Set Exercise
Use the exerciser to start and run the generator set
under load once a week to maximize the reliability of the
emergency power system. See Section 1.6 for
instructions to program the exerciser.
5.2.2 Monthly Automatic Control
System Test
Test the transfer switch’s automatic control system
monthly. See Section 1.5 for the test procedure.
D
Verify that the expected sequence of operations
occurs as the switch transfers the load to the
emergency source when a preferred source failure
occurs or is simulated.
D
Observe the indicator LEDs included on the transfer
switch to check their operation.
D
Watch and listen for signs of excessive noise or
vibration during operation.
D
After the switch transfers the load to the standby
source, end the test and verify that the expected
sequence of operations occurs as the transfer switch
retransfers to the preferred source and signals the
generator set to shut down after a cooldown period.