Kohler EKOZD Series Service page 213

12.4.8 Faults
The Decision-Makerr 3500 controller supports a variety
of faults and warnings to make troubleshooting and
diagnostics more transparent and streamlined. Some of
the faults have an effect on the operation of the system,
some indicate a malfunction in the operation of the
system, others are provided only to provide the operator
with status information.
Auto-Validation
Auto-Validation is a function that verifies the bus
metering connections, breaker control functions, and
breaker status feedback once per power cycle of the
generator controller. The function is intended to detect
problems in the wiring and to alert the operator with
easily-understood faults that allow easy troubleshooting
and repair of the fault, while protecting the generator
controller from damage due to incorrect connections.
Auto-Validation supports the following messages:
Bus Sensing Connected to Wrong Side of Paralleling
D
Breaker (bus is live anytime gen is running and turns
off with generator).
Live Bus Sensed when Dead Bus Expected (inhibited
D
in Baseload or System Control Mode).
CB Status Fault (shutdown—intended to prevent the
D
system from running with incorrect breaker status, as
it could be a dangerous condition).
Gen to Bus Phase Angle Mismatch (the generator
D
and bus should have 0_ phase angle when the
breaker is closed. If all three wires are connected to
incorrect phases, the measurement will show 120_
out of phase with the breaker closed.).
Bus Sensing Phases A and B are Reversed (phase C
D
is connected correctly).
Bus Sensing Phases B and C are Reversed (phase A
D
is connected correctly).
Bus Sensing Phases C and A are Reversed (phase B
D
is connected correctly).
Bus Sensing Phase A Connection Error (the
D
measured voltage indicates that Phase A is not
connected).
Bus Sensing Phase B Connection Error (the
D
measured voltage indicates that Phase B is not
connected).
Bus Sensing Phase C Connection Error (the
D
measured voltage indicates that Phase C is not
connected).
TP-6953 7/19
Bus Sensing Connection Error (the Bus sensing is
D
reading incorrectly, but none of the phases are
reading as expected—probably more than one wire is
disconnected).
Bus Sensing Not Connected
D
sensing wires are connected).
Breaker Outputs Not Configured (the Breaker
D
outputs are driven by programmable I/O. They will not
work unless they have been configured).
Breaker Status Input Not Configured (the breaker
D
status is a programmable input in later firmware
versions, if it is not configured, the system will get no
status indication from the circuit breaker).
Note: Not all Auto-Validation warnings are supported in
all applications and in all firmware versions.
Failure to Synchronize
A Failure to Synchronize indicates that the generator
controller has been attempting to match frequency,
phase, and voltage with the paralleling bus for longer
than the Fail to Sync Delay without being able to
maintain synchronism for the duration of the dwell timer
to allow the breaker to close.
Note: Failure to Synchronize does not stop the
controller from continuing to synchronize. The
Failure to Synchronize Warning is reset when
synchronizing stops because the breaker closes,
or the synchronization is canceled.
Fail to Open
A failure to open indicates that the controller attempted
to open the breaker, but that the breaker status didn't
indicate open within the Fail to Open Delay. This
typically indicates a wiring issue, but non-standard
breakers may take longer than the default 1.0 second
Fail to Open Delay to respond to a trip signal. If the
breaker opens shortly after the warning occurs, it may
be possible to extend the time delay to make it work, but
only after considering that a delay in breaker tripping
may decrease the effectiveness of the generator
protective relays.
Section 12 Paralleling System Information
(none of the bus
213