TM 10-6640-239-13 3-4 Table 3-2.  Troubleshooting MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. NO ELECTRICAL POWER TO LABORATORY, PURGE SYSTEM DOES NOT OPERATE. Step 1.    Check generator set circuit breaker switch is in close position. Place generator power output switch in close position. Step 2.    Check generator set voltmeter for correct setting. Adjust voltage to 208-220 VAC. WARNING Do not come in contact with main power cable connection on generator set with power applied to laboratory.  Death or serious injury may result. Step 3.    Check that main power cable is properly connected to generator set and power distribution module. a.    Turn generator set circuit breaker switch to open. b.   Shut off generator set. c.    Properly secure main power cable to connectors. Step 4. Check that power distribution module Lab B On/Off switch is pulled out. a.    Pull power distribution module Lab B On/Off switch out. Step 5.    Check that main power cable is properly connected to laboratory electrical power receptacle. WARNING Do  not  attempt  to  disconnect  or  connect  main  power  cable  to  laboratory electrical receptacle with generator set applying power to the cable.  Death or serious injury may result. a. Place generator set circuit breaker switch to open. b. Shut off generator set. c. Make proper power cable connection. d. Start generator set. e. If purge system still fails to operate, notify unit maintenance. WARNING IF  purge  cycle  has  not  taken  place,  do  not  enter  Petroleum  Laboratory without  first  allowing  laboratory  to  vent  to  atmosphere  via  two  laboratory doors for a minimum of 20 minutes.  Death or serious injury could result. 2. ALL CEILING LIGHTS FAIL TO ILLUMINATE. Check and reset circuit breaker A1CB1. If lights still fail to operate, notify unit maintenance.