Faults Related To Paralleling - Kohler 14RCA Instructions Manual

2.5.6

Faults Related to Paralleling

®
If the PowerSync Automatic Paralleling Module (APM) is used with two 14 kw or two 20 kW generator sets, additional faults
and events related to the paralleling system may be displayed on the controller and/or in OnCue Plus. This section lists those
faults and events. See the installation instructions provided with the APM for additional paralleling information.
Note:
Contact an authorized dealer for paralleling system installation, startup, troubleshooting, or service.
Fault Text
Current A High Warning
Frequency High Warning
Frequency Low Warning
Reactive Power Low Warning
Real Power High Warning
Real Power Low Warning
Voltage L1-L2 High Warning
Voltage L1-L2 Low Warning
 Pressing OFF will stop the generator set.
Figure 26 Warning Messages (protective relay disconnect)
Fault Text Description
The bus is measured to be dead when one of the generators is
BusDeadLive
supposed to be supplying voltage to the bus (closed contactor)
The bus is measured to be live when no generators are
BusLiveDead
connected to it (both contactors open).
The two generators that are intended to be paralleled have
CfgModelNum
incompatible model numbers.
The system voltage of the two generators intended to be
paralleled is not the same. Because the system does not know
CfgSysVolt
which voltage is correct, the generators will not be allowed to
start.
This generator has paralleled to the other generator and is
ChkngMeter verifying that the metering is connected and establishing the
connection direction.
Failure to Auto-Discover APM connections.
ConCheckFail
Performing APM connection auto-discovery.
ConChecking
APM connection auto-discovery is not complete. This means that
ConNotDeterm
the generator does not know which contactor is connected to it.
ContactorOk Successful auto-discovery of APM connections.
The power metering on this controller gives a signal that is not
ErraticSig consistent with the system configuration. Reversing the power
direction does not resolve the problem.
The Automatic Paralleling Module has stopped communicating on
LossOfComAPM RBUS. (An APM was detected on the RBUS network but is no
longer communicating).
TP-7092 11/22
Description
Over Current
Over Frequency
Under Frequency
Loss of Field
Over Power
Reverse Power
Over Voltage
Under Voltage
When Active Warning Delay, sec.
Paralleled
Paralleled
Paralleled
Paralleled
Paralleled
Paralleled
Paralleled
Paralleled
Display Cleared On
10 Press AUTO or OFF *
10 Press AUTO or OFF *
10 Press AUTO or OFF *
10 Press AUTO or OFF *
10 Press AUTO or OFF *
10 Press AUTO or OFF *
10 Press AUTO or OFF *
10 Press AUTO or OFF *
Possible Causes *
Bus metering V9A and V9B connections to
V9 of paralleling protection harness are
connected incorrectly.
Bus metering V9A and V9B connections to
V9 of paralleling protection harness
connected incorrectly.
Incorrect configuration of one of the
generators. Different generator types.
The paralleled generator sets must be the
same kW model. (i.e. two 14 kW or two 20
kW models).
One of the two generators is incorrectly
configured.
Intermittent connections on RBUS network
wiring.
Status message appears the first time the
two generators are paralleled.
Wires 9A and 9B crossed between the
generators.
Wires 9A or 9B not connected.
This generator has started in RUN, the
other generator is in OFF.
Generators not yet started in RUN with
other generator in OFF. See the APM
instruction sheet for instructions to perform
the auto-discovery procedure.
Auto-discovery was activated by placing
other generator in OFF and this generator
in RUN.
Bad wiring to the CT.
Too much tension on wires from the CT to
the controller.
APM is unplugged.
Primary controller is powered down. Check
the battery connections. See previous page
for more information.
Intermittent connections on RBUS network
wiring. Check RBUS communication
connections.
37