TM 9-6115-730-24
0004
TQG TROUBLESHOOTING
The 200 kW TQG set electronics has continuous self-testing capability. Most problems with the generator set will
generate a fault code that is displayed on the Generator Set Control (GSC) or the Digital Voltage Regulator (DVR).
The troubleshooting procedures for the 200 kW TQG are broken into six separate Work Packages (WP):
Before trying any fault isolation, make note and record all of the fault codes displayed on the GSC and DVR. Also,
note and record any fault lamps that are lit on the GSC and the alarm module.
The failure analysis here usually assumes a single fault code indication. Because of extensive self-testing
capability, a single failure will often generate multiple fault codes (e.g. a failure of a power supply will generate a
failure code for all of the sensors powered up by that power supply). It may be necessary to read through all of the
associated fault isolation procedures prior to starting in order to assess the fault location.
The voltages and currents in the 200 kW TQG are dangerous and capable of causing death instantaneously. The
engine and generator set are heavy and represent enormous mechanical power. Refer to the WARNING
SUMMARY before attempting to troubleshoot system. The following warnings, cautions, and notes should be read
and followed during all attempts at troubleshooting.
WARNING
Metal jewelry will conduct electricity. All jewelry can become entangled in generator set
components. Remove all jewelry when working on generator set. Failure to comply can cause
injury or death to personnel by electrocution.
High voltage is produced when this generator set is in operation. Make sure unit is completely
shut down and free of any power source before attempting any repair or maintenance on the unit.
Failure to comply can cause injury or death to personnel.
High voltage is produced when the generator set is in operation. Never attempt to start or
maintain the generator set unless it is properly grounded. Failure to comply can cause injury or
death to personnel.
DC voltages are present at generator set electrical components even with generator set shut
down. Avoid shorting any positive with ground/negative. Failure to comply can cause injury to
personnel and damage to equipment.
Dangerously high voltage can exist across current transformer (CT) output with engine running.
CT could explode if disconnected from load with engine running. Do not disconnect CT with
generator rotating. Failure to comply can cause serious injury or death to personnel.
Slave receptacle (NATO connector) is electrically live at all times and is unfused. The Battery
Disconnect Switch does not remove power from the slave receptacle. NATO slave receptacle has
24 VDC even when Battery Disconnect Switch is set to OFF. This circuit is only dead when the
batteries are fully disconnected. Disconnect batteries before performing maintenance on the
slave receptacle. Failure to comply can cause injury or death to personnel.
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