TP-6745 7/10 21Section 2 Troubleshooting
Section 2 Troubleshooting
2.1 Initial Checks
When troubleshooting a problem, check the following
things first.
D Check the Service Required LED and the transfer
switch controller display for fault or warning
indications. If a fault or warning is indicated, proceed
to Section 2.9.
D Disconnect power to the transfer switch and check for
loose connections. Check the source lugs, controller
harnesses, and generator set engine start
connection.
D Check the event history log. The log lists the 100
most recent transfer switch events, including
transfers and DIP switch setting changes as well as
faults and alarms. See Section 2.2 for instructions to
view the event history log.
D Check the system settings and time delays. See
Section 2.5, System Settings.
Read and follow all safety precautions in this manual
and on labels on the switch. Only trained and qualified
personnel should service the transfer switch and
connected equipment.
Refer to the wiring diagrams provided with the switch or
the wiring diagram manual when troubleshooting the
transfer switch and controller.
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
DANGER
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
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.
Testing live electrical circuits. Hazardous voltage or
current can cause severe injury or death. Have trained and
qualified personnel take diagnostic measurements of live
circuits. Use adequately rated test equipment with electrically
insulated probes and follow the instructions of the test
equipment manufacturer when performing voltage tests.
Observe the following precautions when performing voltage
tests: (1) Remove all jewelry. (2) Stand on a dry, approved
electrically insulated mat. (3) Do not touch the enclosure or
components inside the enclosure. (4) Be prepared for the
system to operate automatically.
(600 volts and under)
2.2 View Event History
When troubleshooting, check the event history for
faults, transfer attempts, or other events leading to the
current condition. The history lists the 100 most recent
transfer switch events, including transfers and DIP
switch setting changes as well as faults and alarms.
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