TP-6953 7/19 131Section 7 Troubleshooting
Step Potential Cause
Explanation Troubleshooting
Fault: Generator Current Average: High Warning
1 Excessive reactive
load
The generator breaker will trip to prevent the generator from damage due to
excessive stator current. Note, the controller also has a heat-model-based
alternator protection algorithm (which will shut the generator down).
Ensure that the load is low enough for a single generator to support it.
Fault: Generator Total Reactive Power: Low Warning
1 Different sized units The reactive power may overshoot when in a power control situation such as a
load ramp or a quickly changing customer load.
It may be necessary to adjust the kVAR load sharing gains.
2 Different automatic
voltage regulator
settings
Setting the Engine Speed Adjust parameter high on a generator will result in
that generator providing more real power than the other generators. It is
possible to drive the other generators offline in light loading conditions.
Set the voltage regulator average voltage adjustment to the same value on
all connected generators.
3 Different voltage
calibrations
Because each generator will attempt to match the target output voltage,
generators with incorrect calibration may be targeting a different output voltage,
thus generating or absorbing VARs.
Verify the controller is measuring v oltage accurately, If not, re-calibrate.
4 Failure in voltage
regulatororactivator
board
The generator breaker will trip to prevent the generator from absorbing VARs
from the other generators. Providing power while absorbing VARs may cause
that alternator to slip a pole—potentially damaging the rotor or crankshaft.
Verify the voltage regulator and activator are ok. Perform load tests to
verify.
Fault: Generator Management Enabled: Erroneous Data Received Warning
1 Two generators that
are communicating on
the network have
different Order
Selection modes
Generator management will not operate if any generators on the PGEN network
have different Order Selection modes.
Adjust the Order Selection mode on any generator on the network to set the
Order Selection mode in all controllers.
2 Two generators that
are communicating on
the network have
different Stability
delays
Generator management will not operate if any generators on the PGEN network
have different Stability delays.
Adjust the Order Selection mode on any generator on the network to set the
Stability delay in all controllers.
3 Two generators that
are communicating on
the network have
different Redundancy
Requirements
Generator management will not operate if any generators on the PGEN network
have different Redundancy Requirements.
Adjust the Order Selection mode on any generator on the network to set the
Redundancy Requirements in all controllers.
4 Two generators that
are communicating on
the network have
different Maximum Run
Time Hour Difference
Thresholds
Generator management will not operate if any generators on the PGEN network
have different Maximum Run Time Hour Difference Thresholds.
Adjust the Order Selection mode on any generator on the network to set the
Maximum Run Time Hour Difference Threshold in all controllers.
5 Two generators that
are communicating on
the network have
different Maximum
Fuel Level Difference
Thresholds
Generator management will not operate if any generators on the PGEN network
have different Maximum Fuel Level Difference Thresholds.
Adjust the Order Selection mode on any generator on the network to set the
Maximum Fuel Level Difference Threshold in all controllers.
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