Full Product Manual

40 TP-7092 4/23
Fault Text
Description
Possible Causes *
LossOfComm2
The primary controller has lost communication with the secondary
controller. (A secondary controller was detected, then
communication was lost.)
RBUS disconnected, secondary controller
battery disconnected, updating firmware in
secondary controller, or intermittent RBUS
connections.
LossOfField
This generator has absorbed more than 25% reactive power
(magnetic excitation current) for 20 seconds.
Generator voltage on this generator is not
calibrated correctly.
Generator voltage on other generator is not
calibrated correctly.
Bus voltage on this generator is not
calibrated correctly.
Bus voltage on the other generator is not
calibrated correctly.
MeteringOk
The generator has verified that the metering is connected
correctly and that the direction is consistent with expected power
direction.
Status message indicates that the CT is
connected to the generator correctly.
MeterUnknown
This generator does not know if the metering is connected or the
orientation of the connection. This means that the generators
can’t share load accurately until this information is known.
System commissioning and startup not yet
complete. See the APM instructions.
NoCurrent
The generator has applied load (using the other generator) and
has observed no current on the power sensing inputs.
The CT is not connected to the controller.
The output leads from the generator do not
go through the CT in the correct direction.
See the APM instructions.
SyncFailure
The generator has been attempting to synchronize for over 2
minutes without success.
Generator is hunting.
Advanced speed control settings need
adjustment.
Load is changing frequently to disturb the
online generator.
 For paralleling system troubleshooting and service, contact an authorized dealer.
Figure 27 Events Related to Paralleling
Generator Set State
Description
Generator Management Off
This generator has been stopped by generator management because it is not presently needed to
supply the load. The generator is available and will start if it is needed again.
Protective Relay Tripped Contactor
The contactor has been forced to open to protect one of the generators or the customer’s load.
Synchronizing
The generator is actively trying to match frequency, voltage and phase with that of the paralleling
bus.
Unloading
The generator is actively trying to transfer load from itself to the other generator.
Figure 28 Generator Set States Related to Paralleling