TM 9-2350-267-10APU STARTING IN EXTREMELY COLD WEATHER - Continued8. Check that APU GENerator switch (9) is OFF.9. Turn FUEL SHUT OFF switch (10) ON. The LOW OIL PRESSure lamp (11)will light until APU engine starts.10. Turn PREHEAT switch (12) to MOMentary ON. Hold switch ON for 2 minutes.11. While holding PREHEAT switch ON, position and hold START switch (13) toMOMentary ON. Hold both switches ON until APU starts or until 30 secondshave passed.NOTEIf APU engine doesn’t start within 30 seconds, release STARTswitch (13), but continue to hold PREHEAT switch ON for an-other minute. After allotted time, position START switch ONagain. If engine still does not start after another 30 seconds ofstarting procedure, refer to procedure for starting APU whenoutside temperature is -25° to -65° F (p 2-225).2-223
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