TP-6811 7/1662 Section 5 Troubleshooting
Fault Message Action Description/ Comments Check
AC Sens Loss Shutdwn
(Loss of AC sensing shutdown)
Shutdwn The controller shut down the generator
because there was less than 5% of
rated voltage measured on Phase A (or
B or C if 3 Phase) for 3 seconds, only in
AUTO, only after acceptable voltage
(> 5% of UV setting) has been detected.
Check for loose wiring and
connections.
Check all AC leads.
Troubleshoot alternator.
AC Sens Loss Warning
(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 W 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 Shtdwn SD High generator current has been
detected. The generator set shuts down
to protect the alternator from damage
caused by overheating the windings.
(38RCL only)
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)
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.
Aux Input Warning *
(Auxiliary input warning)
Warning The digital input for a custom warning
(AuxiliaryInputWarning - PIM) is active
(low).
Check customer equipment
connected to the PIM module.
Batt Chg Flt Warning *
(Battery charger fault warning)
Warning The digital input for Battery Charger
Fault Warning (PIM) is active (low). For
an external battery charger only, not
applicable to the RDC2 built-in battery
charging.
Check customer equipment
connected to the PIM module.
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 cranking battery.
Battery Low Shutdwn Shutdown Battery voltage dropped to 11 VDC or
less for 30 seconds or more. Operates
after the generator set has been
running for at least one minute.
Check cranking battery.
Check battery charger DC
output voltage from RDC2 on
lead CHO to the battery.
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 from RDC2 on
lead CHO to the battery.
* Programmable Interface Module (PIM) required
w Load management device (LCM, load shed kit, or RXT with combined interface/ load management board).
[
Applies during exercise runs and normal operation.
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