TM 10-6640-215-13 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 power output switch is ON. Place generator power output switch ON. Step 2.  Check generator set output voltage for correct setting. Adjust voltage to 208-220 VAC. WARNING Do  not  come  in  contact  with  main  power  cable  connections  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. a. Turn generator set output power switch OFF. b. Properly secure main power cable to connectors. Step 4.  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 output power switch OFF. b. Make proper power cable connection. c. If purge system still fails to operate, notify unit maintenance. WARNING If  purge  cycle  has  not  taken  place,  do  not  enter  the  Petroleum Laboratory   without   first   allowing   the   laboratory   to   vent   to   the atmosphere  via  the  two  laboratory  doors  for  a  minimum  of  20 minutes.  Death or serious injury could result. 3-4