TM 9-6150-228-13&P Table 2-1.  Operator Preventive maintenance Checks and Services for Model PEU-155/E Item No. Interval Location Item to Check/Service Procedure Not fully Mission Capable If: 1 Before Enclosure Inspect for obvious damage to endosure or door assemblies Intemal wiring is exposed 2 Before Endosure Inspect cover assembly induding hinge and gasket. Cover will not close properly. 3 Before Endosure Check drainage openings in endosure lower comers and dean if necessary. 4 Before Top Panel Check for damaged circuit breakers Circuit breakers are damaged so as to affect function or safety. 5 Before Top Panel Check operation of sliding bar assembly Sliding bar is damaged so that it will not function properly. 6 Before Top Panel Check that indicator lights are present and unbroken. 7 Before Connectors Inspect connectors for damage Connectors are damaged 8 Before Connectors Inspect connector covers Covers or gaskets are missing or unserviceable. 9 Before Cable assemblies Check for damaged cable connectors Cable connectors are darnaged 10 Before Cable assemblies Check for split, cut, and damaged insulation. Bare wires are exposed. 11 Before Ground wires Check  that ground  wires  are securely attached to ground terminal(s). Ground wires are frayed or missing 12 Before Connectors Check that unused connectors are capped. CAUTION When   input   power   is   energized,   all   3-phase indicator  lights  should  illuminate.    If  all  three lights  are  not  illuminated,  immediately  turn  off the input power and notify the next higher level of   maintenance.      Damage   to   the   equipment being energized may occur if the problem is not corrected. Maintenance personnel should consult  the  troubleshooting  chart,  Table  3-1,  to determine the problem. 2-5