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TP-6461 1/08 29 Section 2 Controller Troubleshooting
2.7 Warnings and Faults
When a fault exists, the System Alert indicator lights, a
designated output and the common fault output are
turned on, and an appropriate message is displayed to
indicate the fault. See Figure 2-9 for the location of the
System Alert indicator.
ATS warnings and faults are shown in Figure 2-10.
There are three types of warning/fault conditions:
Warning. Warnings automatically reset with a source
availability change or a transfer request.
Fault Requiring Manual Reset. Under these
conditions, normal ATS operation is halted. Active
modes are turned off. If the contactor is in the preferred
source position, the engine cooldown time delay
executes and the engine start contacts open, allowing
the generator set to shut down. See Section 2.7.1 for
instructions to reset faults.
Self Resetting Faults. Under these conditions, active
modes are turned off. If the contactor is in the preferred
source position, the engine cooldown time delay
executes and the engine start contacts open, allowing
the generator set to shut down. When the fault condition
is corrected, the fault is automatically cleared from the
controller and normal ATS operation continues.
GM46892
1. System Alert LED
1
Figure 2-9 Fault Indication
Condition Type Description
Failure to Acquire Standby Source Warning The source voltage did not reach the acceptable range
within a set time (see Time Delays) For example the
Failure to Acquire Preferred Source Warning
within a set time (see Time Delays). For example, the
standby source generator set did not start.
IPM Synching
(In-Phase Monitor Synching) Warning (status) The two sources did not come into phase within the Fail to
Synchronize time delay.
NOTE: If the sources do become in phase, the warning is
automatically cleared and normal ATS operation continues.
Battery Backup Low Warning The ATS backup battery voltage is low. Replace the battery
on the main logic board. See Section 4.3.2.
External Battery Low Warning The voltage of the battery connected to the external battery
supply module (EBSM) is low.
Failure to Transfer Warning The signal to transfer is sent to the contactor and the main
shaft auxiliary switch fails to indicate a complete ATS
position change. The controller will attempt to transfer the
unit three times before the fault is indicated.
Auxiliary Switch Fault Manual Reset Fault The main shaft auxiliary switches indicate that the ATS is in
more than one position, or the position changed when no
signal was sent to initiate the change.
Auxiliary Switch Open Manual Reset Fault The main shaft auxiliary switches indicate that the ATS is in
neither position (all inputs are open).
Src N (or Src E) Rotation Err Self-Resetting Fault The detected phase rotation of one or both sources does not
match the pre-selected setting.
I/O Module Lost Comm Self-Resetting Fault An I/O device has stopped communicating or does not have
a correct address specified. Fault resets if communication is
reestablished.
Module Status Change Self-Resetting Fault An accessory module has been disconnected OR a new
module is detected. See Section 2.7.2 to reset.
Module Status Conflict Self-Resetting Fault An accessory module has been replaced with a different
type of module. See Section 2.7.3 to correct.
External Fault (Remote Common
Alarm) Self-Resetting Fault The input contact assigned to the remote common alarm
input function is closed.
Figure 2-10 Warnings and Faults