ENGINEMAN 1 & CSymptomor DifficultyIgnitionfailureFlamefailureBurnersmokes orpulsatesOil pumpfails todeliverCondition may be due toFaulty transformer.Broken or grounded high tensionleads.Cracked high tension electrodeinsulator.Carbon deposits on electrodesor insulators.Incorrect electrode setting.Malfunctioning programing con-trol cams.Faulty ignition cable connector.Solenoid oil or air valve fails toopen.Water in the oil.Dirty or clogged burner tip.Dirty glass in the photocell.Abnormal ambient temperature.Bad electron tube in the photo-cell.Damaged photocell.Faulty electron tube in the com-bustion safeguard control.Loose connection on the photo-cell.Out of oil or have water in theoil.Clogged fuel oil nozzle.Clogged fuel oil line or strainer.B r o k e n p r e s s u r e r e g u l a t o rspring.Faulty solenoid valve.Broken belt (V-belt drive).Dirty nozzle.Excessive return line oil pres-sure (return flow system).Nozzle not positioned correctly.Insufficient air for combustion.Low oil pressure.Incorrect burner linkage set-ting.Incorrect setting of primary air.Low voltage (d-c machinery).Fluctuating voltage.Leak in the suction line.Insufficient fuel in the tank.Clogged or dirty strainers.Worn pump members.Symptomor DifficultyOil pumpfails todeliver(continued)Blower failsto deliverFeed pumpfails todeliverExcessivevibrationCondition may be due toImproper oil relief valve set-ting.Defective gasket on the oil pump.Leaky pump seal.Slipping V-belts.Driver pulley loose on the shaft.Misalignment.Dirty fan blades.Restriction at the blower inlet.Seized bearings in the blower orthe blower drive.Bent or broken shaft.Dirty air inlet screen.Insufficient supply voltage tomotor (d-c machinery).Fluctuating voltage.Dirty suction strainer.A b n o r m a l l y h i g h w a t e r t e m -perature.Leak in the suction line.Pump packing gland leaks badly.Plugged inlet piping.Excessive discharge head.Slipping or broken drive coup-ling.Jammed pump impeller.Dirty water level relay contacts(electrode - probe type con-trol).Malfunctioning pump time delayrelay. Grounded water probes(electrode - probe type con-trol).Pump vapor locked.Insufficient water supply.Reversed rotation.Wornout impeller.Defective water pressure gage.Combustion pulses.Loose hold-dorn bolts.Badly worn bearings.Insufficient air to the burner.Loose mechanical fastings.Misalignment of rotating auxil-iaries.Dynamic unbalance of rotatingauxiliaries.Figure 7-2.—Troubleshooting guide—auxiliary boilers.7-8121.21
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