TM 9-2350-287-20-12-19. TROUBLESHOOTING CHART (continued).v. AFES, ENGINE (continued).(7) AFES MEGOMETER TROUBLESHOOTINGPROCEDURES (continued).Troubleshoot engine AFES system (para2-19 v. (3), Fault lamp remains on. Autoled is lit.). Verify problem is solved.F. 1. Check operation of engine AFES T/A paneloverheat and fire detection circuits as follows:a. Reduce potentiometer setting to 5.0 k.NOTEThe red FIRE lamps on the engine AFES T/Apanel and the RSI panel in the crew compart-ment should begin to blink on and off.b. Observe red FIRE lamps on the engineAFES T/A panel and RSI panel.c. Reduce potentiometer setting to 1.0 k.d. Observe red fire lamps on the engine AFEST/A panel and on the RSI panel.Do the FIRE lamps stay on without blinking anddo the AUTO FEXT LED’s on the engine AFEST/A panel illuminate?Repair or replace wire harness 12352354(para 7-78). Re-adjust the potentiometerknob to 10K (fully on) and press the RESETbutton on the test box. Verify problem issolved.Replace engine AFES T/A panel (para 21 -13).Readjust the potentiometer knob to 10K (fullyon) and press the RESET button on the testbox. Verify problem is solved.Continued on next page2-341
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