Kohler 38RCLB

TP-6907 5/1664 Section 5 Troubleshooting
5.6 Fault Messages
The RDC2 controller displays fault messages to aid in
troubleshooting. Fault messages, descriptions, and
recommended checks are listed in Figure 5-2.
Some fault conditions are reported to the RDC2
controller by the engine ECM. Refer to the Engine
Service Manuals for more information.
Identify and correct the cause of the fault condition.
Then press the OFF button to r eset the controller after a
fault shutdown.
Fault Message Action Description/ Comments Check
AC Sensing Lost
(Loss of AC sensing warning)
Warning The controller has measured less than
5% of rated voltage on Phase A (or B or
C on 3 Phase), for 1 second, 10
seconds after crank disconnect.
Check for loose wiring and
connections.
Check all AC leads.
Troubleshoot alternator.
Accy PwrOver Warning Accessory Power Overload. An over
current fault (short circuit) on the
accessory controller power output.
Check wiring to accessories.
Troubleshoot the accessories.
Refer to the documentation
provided with the accessories.
Alt Protect Shutdwn Shutdwn High generator current has been
detected. The generator set shuts down
to protect the alternator from damage
caused by overheating the windings.
Reduce the load by
disconnecting non-essential
equipment.
Check wiring and troubleshoot
connected equipment.
Check for phase imbalance.
Check for very high power
factor loads.
ATS ComError Warning
(ATS communication error)
Warning The controller has lost communications
with the RXT ATS that had previously
been communicating properly.
Check connection to ATS
module.
ATS Fail Xfr Warning
(ATS fail to transfer)
Warning The RXT ATS has reported a fail to
transfer, the digital output for ATS Fail
To Transfer (PIM) is active (contacts
closed).
Consult ATS manual for
troubleshooting.
ATS PhaseRot Warning
(ATS phase rotation mismatch)
Warning The RXT ATS has reported a Phase
Rotation Mismatch (3 phase only) and
the ATS will not transfer.
Check wiring to ATS.
Consult ATS manual for
troubleshooting.
Aux Input Shutdwn *
(Auxiliary input shutdown)
Shutdown The controller shut down the generator
because the digital input for a custom
shutdown (AuxiliaryInputShutdown -
PIM) was activated (low).
Check customer equipment
connected to the PIM module.
Bar Pres Lo Warning
(Bp low pressure)
Warning The ECM reported low barometric
pressure.
Check the enclosure
ventilation.
Battery CrLo Warning Warning Engine starting battery voltage falls
below 11 V for more than 10 seconds.
Inhibited during the engine crank cycle.
Clears when the battery voltage returns
to an acceptable level.
Check the battery rating and
condition.
Check the battery charger
operation.
Charge or replace the battery.
Battery High Warning Warning The controller has measured battery
voltage that is above the high warning
setting for 10 seconds or more.
Operates during exercise and normal
operation.
Check the battery rating and
condition.
Check the battery charger
operation.
Battery Low Warning [ Warning The controller has measured battery
voltage that is below the low warning
setting for 90 seconds or more.
The battery voltage is checked before
allowing an exercise to start.
Check cranking battery.
Check battery charger DC
output voltage on the leads
from RDC2 to the battery.
* Programmable Interface Module (PIM) required
[ Applies during exercise runs and normal operation.