Medium Large Transport
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
Blocked out on time. The ATIS temp was M12; with no visible moisture expected on climb. I failed to include the anticipated use of anti-ice for contaminants in my briefing. Following the #1 engine start; we were cleared for taxi. I had instructed the FO (First Officer) to start the #2 engine during the initial taxi movement. While making a sharp 180 degree turn from the gate; I noticed the ramp outside of the gate area was contaminated; and selected the anti-ice selector to ON. After the #2 engine was started; we had an ENG REF A-I DISAGREE; with ENG TDS (Temperature Detection System) REF A-I ENG EICAS messages. I had suspected it was due to the A-I mode selector being turned ON and no anti-ice selection in the TDS.When we got to an area of the taxiway without contaminants; the mode selector was moved back to AUTO; but the fault did not clear. We ran the QRH; resending and resetting the takeoff data with ENG anti-ice selected; this time; with no help. Maintenance Control was contacted; and we shut down the engines. The messages cleared during shutdown; but returned when the engines were re-started and configured the same way. Discussed situation with on-duty CP (Chief Pilot) and coordinated with Maintenance Control to return to gate for a power reset. While waiting for Maintenance; [I] researched the AOM to find the ENG REF A-I DISAG message will be present when the REF A/I is set to ENG in the TDS and the OAT is below 5 degrees Celsius. At this point; it was evident why the messages were there; as the OAT was -12; and the A-I TDS should have been set to ALL. Maintenance came out to the aircraft; ran the FIM (Fault Isolation Manual Procedure); and cleared the log page item.Anytime contaminants are reported/suspected; this should be briefed; and the appropriate anti-ice settings should be confirmed in the TRS. Before leaving the gate; I should have recognized the TDS anti-ice needed to be selected to ALL; for the corresponding OAT and conditions.
Captain reported EICAS anti-ice malfunction message annunciation during taxi for takeoff.