Common EST4 trouble codes during initial commissioning typically involve database synchronization, module placement, and network connectivity. Key codes include:
0651 ($DatabaseSupervision): Indicates a corrupt database on the 4-CPU (Page 207) [1].
0653 ($DownloadInProgress): Triggered when a 4-CU database download is incomplete or currently in progress (Page 207) [1].
0609 ($Configuration Supervision): Occurs when a module is installed in the wrong rail slot (Page 204) [1].
0654 ($UnexpectedModule): An undefined module has been detected by the system (Page 207) [1].
0660 / 0661 ($eth0 / $eth1): Indicates a network link failure where a configured SFP is not connected to the node card (Page 208) [1].
0648 ($GroundFault): A wiring fault where a conductor has continuity to ground (Page 207) [1].
0665 ($PowerSupplyFault): Often caused by a loose or missing cable between the power supply and the CPU (Page 209) [1].
