Testing; Weekly Generator Set Exercise; Monthly Automatic Control System Test; Inspection And Service - Kohler MPAC 1500 Manual

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.
connections with tools or jewelry while making adjustments or
repairs. Remove all jewelry before servicing the equipment.
NOTICE
Hardware damage. The transfer switch may use both
American Standard and metric hardware. Use the correct
size tools to prevent rounding of the bolt heads and nuts.
NOTICE
Electrostatic discharge damage. Electrostatic discharge
(ESD) damages electronic circuit boards.
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.
104 Section 7 Scheduled Maintenance
Do not contact electrical
Prevent
7.2

Testing

7.2.1

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.
instructions to program the exerciser.
7.2.2 Monthly Automatic Control
System Test
Test the transfer switch's automatic control system
monthly. See Section 2.5 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.
D
On programmed-transition units, verify that the time
delay in the OFF position functions during transfer to
the standby source and transfer back to the preferred
source.
7.3

Inspection and Service

Contact an authorized distributor/dealer to inspect and
service the transfer switch annually and also when any
wear, damage, deterioration, or malfunction of the
transfer switch or its components is evident or
suspected.
7.3.1

General Inspection

External Inspection. Keep the transfer switch clean
and in good condition by performing a weekly general
external inspection of the transfer switch for any
condition of vibration, leakage, excessive temperature,
contamination, or
accumulations of dirt, dust, and other contaminants
from the transfer switch's external components or
enclosure with a vacuum cleaner or by wiping with a dry
cloth or brush.
Note: Do not use compressed air to clean the transfer
switch because it can cause debris to lodge in the
components and damage the switch.
See Section 5.7 for
deterioration. Remove
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