Graco 16W887, ti23055a, 16W884, 16W881, 16W867 Fluid Pump Runs Constantly, Troubleshooting Procedure

Page 24

Troubleshooting

Fluid Pump Runs Constantly

Troubleshooting Procedure:

With a pressure gauge plumbed into the paint hose, start the engine. Turn pump switch ON. Does sprayer exceed maximum pressure?

YES

1.Perform Pressure Relief Procedure (page 21), turn prime valve forward to SPRAY position, and turn power switch OFF.

2.Remove control box cover.

			Pump problem. See the proper fluid pump
			manual for the sprayer for further trouble-
NO			manual for the sprayer for further trouble-
NO			shooting procedures.
			shooting procedures.

Disconnect clutch wires from control board (see diagram, page 29). Does the pump stop run- ning?

YES

Make sure clutch wires are plugged in (see dia- gram, page 29). Do the clutch test points read 10-18 DC volts?

YES

Unplug transducer from control board.

YES

Bad transducer.

Replace and test with a new one.

NO

NO

NO

Mechanical problem in the clutch pinion as- sembly (clutch may be close to the rotor).

Check for a short from the two clutch wires to the frame. If shorted, repair or replace

faulty wire.

Replace the control board.

24

332919C

Image 24

Contents Operation Table of Contents Fire and Explosion Hazard Equipment Misuse Hazard Component Identification Standard Models 3400, 3900, 5900, 5900HD, 7900, 7900HDProContractor Models 3900, 5900, 7900, 5900HD, 7900HD Ironman Models 5900, 7900, 7900HD Lo-Boy Models 3900, 5900 Convertible Models Pressure Relief Procedure Grounding Setup Convertible Models Only Change Engine to MotorStartup Switch Tip Guard Assembly SprayClearing Tip Clogs WatchDog Protection SystemProContractor and Ironman units only Hose Reel ProContractor units onlyDigital Tracking System ProContractor and Ironman units Operation Main MenuChange Display Units Job GallonsPress and hold DTS button to clear error code to zero Cleanup Turn prime valve down Drain position Maintenance Pressure Relief ProcedureTroubleshooting Problem Cause SolutionTroubleshooting Troubleshooting Procedure Fluid Pump Runs ConstantlyControl Board Malfunction Control Board Malfunction Steps VoltsConvertible Electric Motor Will Not Run Convertible Electric Motor Will Not Run Steps See step Is there over 10-20 AC volts? Beep Digital Display Messages Two blinks is the same as E=02Pinion Assembly/Clutch Armature/Clamp Pinion Assembly/Clutch Armature RemovalInstallation Technical Data ModelsMetric Models Honda GX160 Engine Ansi Power Rating @ 3600 rpm Horsepower Honda GX200 Engine Ansi Power Rating @ 3600 rpm Horsepower Graco Standard Warranty Graco Information