Operation and Maintenance Manual for GENTEC® Model 881VR ...

# Problem Probable Cause123The vacuum gaugeneedle does not moveoff “0” when regulatoris connected tovacuum source.The vacuum regulatorgauge shows areading but there is nosuction at the tubing.Under the regulatorcannot reach thespecified suction level(i.e., 120mmHg or240mmHg, dependingupon model).The regulator is in the “OFF”mode, or is not fully in the“CONT” or “INT” position.The suction regulator is in the“INT” position, and has startedin the “OFF” cycle.The adjustment knob is in thefully counter-clockwise, closed,position.The collection bottle or suctiontube is leaking.The collection bottle is too full,causing the float to shut off thesuction.The filters or suction tubing areclogged.Suction source cannot providesufficient suction.RegulatorInternalProblemsRelief valve (F) isdamaged.O-ring on vacuumgauge (B) isdamaged.O-ring in regulatorassembly (E) isdamaged.Regulator assembly(E) is damaged.CorrectiveMeasuresMove the modeselector to the“CONT” or “INT”position.Wait 8-10 secondsfor the “ON” cycleto start.Turn theadjustment knobclockwise to open.Check thecollection bottleand tubing for leaks.Empty thecollection bottle.Change the filtersand tubing.Increase sourceequipment vacuumsettings.Replace relief valve.Replace o-ring.Replace o-ring.Replace regulatorassembly.4Under REG mode thesuction is too strongand cannot be reduced.Mode selectorassembly (H) isloose.Gas assist port (6) is clogged.Tighten or replacemode selectorassembly.Clean gas assistport.6