IB140012EN For more information visit: www.eaton.comInstructional BookletEffective: March 2021 Page 41Operation and Maintenance Manual,Automatic Transfer Switch Controller, ATC-900Appendix A: Feature List and Status Display MessagesRED BAR FLASHING MESSAGES ALL RED BARS ARE GENERAL ALARMS1 Lockout Automatic control is disabled but still monitors source status. User must reset2 Engine Test aborted While in engine test, if either S1 or S2 is removed, the warning will display3 Closed Transition Fail (1->2) In Closed Transition, the switching device failed to operate correctly from S1 to S24 Closed Transition Fail (2->1) In Closed Transition, the switching device failed to operate correctly from S2 to S15 In-phase Transition Fail (1->2) With In-Phase, the switching device failed to operate correctly from S1 to S26 In-phase Transition Fail (2->1) With In-Phase, the switching device failed to operate correctly from S2 to S17 Open Transition Fail (1->2) In Open Transition, the switching device failed to operate correctly from S1 to S28 Open Transition Fail (2->1) In Open Transition, the switching device failed to operate correctly from S2 to S19 Generator Unavailable When directed to transfer and genertor is not available10 Failed to Sync - Frequency With In-Phase or Closed Transition, Failed to sync because of Frequency11 Failed to Sync - Voltage With In-Phase or Closed Transition, Failed to sync because of Voltage12 Failed to Sync - Phase Angle With In-Phase or Closed Transition, Failed to sync because of Phase Angle13 Source 1 Mech Failed to Open The Source 1 Mechanism for a breaker or contactor did not open14 Source 1 Mech Failed to Close The Source 1 Mechanism for a breaker or contactor did not close15 Source 2 Mech Failed to Open The Source 2 Mechanism for a breaker or contactor did not open16 Source 2 Mech Failed to Close The Source 2 Mechanism for a breaker or contactor did not close17 Overran Neutral (S1->N) The mechanism is connected to Source 2 instead of remaining in Neutral.18 Overran Neutral (S2->N) The mechanism is connected to Source 1 instead of remaining in Neutral.19 Factory Options Error Internal controller failure. (clear alarms/reboot)20 Setpoints Error Internal controller failure. (clear alarms/reboot)21 Cal factor Error Internal controller failure. (clear alarms/reboot)22 State Error Internal controller failure. (clear alarms/reboot)23 Timer Error Internal controller failure. (clear alarms/reboot)24 Clock Error Internal controller failure. (clear alarms/reboot)25 RAM test Error Internal controller failure. (clear alarms/reboot)26 ROM test Error Internal controller failure. (clear alarms/reboot)27 Watchdog Internal controller failure. (clear alarms/reboot)28 Self-test Error Internal controller failure. (clear alarms/reboot)29 Gen Start Communications Internal controller failure. (clear alarms/reboot)30 Acc I/O Communications Lost communications to the Accessory I/O Module(s).31 NTP Communications Error Lost communications to the NTP module.32 Clock Sync Error Invalid date/time received from NTP device or Modbus write.33 NTP Module Error Error code received from NTP module.34 Firmware Upgrade Required Previous upgrade attempt interrupted (insert USB and restart upgrade).