TM 10-6640-215-13 Table 4-2.  Troubleshooting- continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 4. NO  POWER  AVAILABLE  IN  PETROLEUM  LABORATORY  (PURGE  CYCLE  TOOK  PLACE  AND  CIRCUIT BREAKER AICBI PLACED IN ON POSITION). Reset circuit breaker A1CB1. If power still not available, replace circuit breaker A 1CB1.  See paragraph 4-19. 5. A GROUP OF CEILING LIGHTS FAILS TO OPERATE (ALL OTHER CEILING LIGHTS OPERATE). Step 1. Check that power is available at appropriate wall light switch. a. If power is available, replace switch.  Refer to paragraph 4-23. b. If power is not available, proceed to step 2. Step 2. Check and reset appropriate circuit breaker. If power still not available, replace circuit breaker.  See paragraph 4-19. 6. DOOR INTERLOCK (MICRO) SWITCH DOES NOT OPERATE PROPERLY. Step 1. Check switch electrical connections. Step 2. Adjust switch. If switch still fails to operate properly, replace the door interlock switch.  See paragraph 4-24. 7. CONVENIENCE OUTLET (RECEPTACLE) INOPERATIVE. Step 1. Check that power is available at outlet. a. If power is available, replace outlet.  See paragraph 4-25. b. If power is not available, proceed to step 2. Step 2. Check and reset appropriate circuit breaker. If power is still not available, replace circuit breaker.  See paragraph 4-19. 8. A/C (ECU) REMOTE CONTROL UNIT FAILS TO OPERATE PROPERLY (POWER AVAILABLE). Troubleshoot  in  accordance  with  TM  5-1420-371-14.    If  necessary,  replace  faulty  remote  control  unit.    See paragraph 4-26. 4-14