TP-6734 5/1026 Section 2 Operation
Code Fault
Warning (W) or
Shutdown (SD)
Condition Check
LB Low battery
voltage
W Engine starting battery voltage falls below
the battery voltage setting (typically
12 volts) for more than 90 seconds when
the engine is not running. Not operative
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.
SS Speed sensor
failure
SD Engine speed sensor has failed. Contact an authorized
distributor/dealer for service.
AC Loss of AC
sensing
W(1sec.)
SD (3 sec.) *
Generator output AC sensing is lost.
Starts 10 seconds after crank disconnect.
Warning: after 1 second if no output
detected after crank disconnect.
Fault: after 3 seconds if voltage was
present and then lost.
Contact an authorized
distributor/dealer for service.
LCB Low cranking
voltage
W Battery voltage falls below 60% of
system battery voltage for more than 6
seconds while the starter is engaged.
Charge or replace the battery.
ATS ATS
communication
error
SD (RRT) *
W (other ATS)
RRT: Shutdown if ATS interface
connection is lost.
Other ATS: Warning is displayed if ATS
interface board is connected when it is
not expected.
See Section 2.9.3.
Check connection to model RRT
transfer switch interface board.
LrC Loss of voltage
regulator
communication
SD * No communication between controller
and voltage regulator.
Contact an authorized
distributor/dealer for service.
* Engine cooldown runs before shutting down.
Figure 2-7 Controller Fault Codes
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