TM 10-6640-239-13 4-10 Section IV. TROUBLESHOOTING PROCEDURES 4-9. TROUBLESHOOTING. Unit troubleshooting procedures listed in Table 4-3 cover the most common malfunctions that may be repaired at the unit level.  Troubleshooting procedures used by the operator should be conduction prior to the unit troubleshooting procedures. This manual cannot list all the possible malfunctions or ever possible test/inspection and corrective action.  If a malfunction is not listed or corrected by a listed corrective action, notify your supervisor. Table 4-2  Symptom Index Troubleshooting Table Item Number Title 1. No electrical power to laboratory, generator output switch on and power cable properly connected. 2. Fluorescent light bulb fails to illuminate after starter replacement. 3. Forward or Rear Emergency light fails to illuminate when power failure occurs. 4. No power available in Supplemental Petroleum Laboratory, purge cycle completed and circuit breaker A1CB1 in ON position. 5. A group of ceiling lights fail to illuminate all other ceiling lights illuminated. 6. Door interlock switch inoperative. 7. Convenience outlet, receptacle inoperative. 8. ECU remote control unit inoperative, power available. 9. Environmental Control Unit inoperative, power available. 10. Purge damper, intake, exhaust, or ECU intake, inoperative. 11. Purge door limit switch inoperative. 12. Air compressor motor inoperative, power available to motor controller. 13. Leaks in system cause compressor to cycle on and off. 14. Air pressure switch causing compressor to cycle on and off. 15. Vacuum pump motor, inoperative, power available to motor controller. 16. Vacuum pressure low due to leaks in system. 17. Water pump inoperative, power available to motor controller. 18. Water pressure low due to leaks in the system. 19. Water pressure switch inoperative. 20. Water chiller fails to produce chilled water (power available). 21. Water heater fails to produce hot water, power available. 22. Submersible pump inoperative, power available.