Pressure Control Repair
Digital Display Messages
Relieve pressure before repair; page 5. No display does not mean that sprayer is not pressurized.
DISPLAY | SPRAYER | INDICATION |
| ACTION |
| OPERATION |
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No Display | Sprayer may be pressurized. | Loss of power or display | Check power source. Relieve | |
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| not connected | pressure before repair or dis- | |
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| assembly. Verify display is | |
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| connected. | |
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| Sprayer may be pressurized. | Pressure less than | Increase pressure as needed | |
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| 200 psi (14 bar, 1.4 MPa) |
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psi | Sprayer is pressurized. Power is ap- | Normal operation | Spray | |
plied. (Pressure varies with tip size and |
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bar | pressure control setting.) |
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MPa |
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| Sprayer stops. Engine is running. | Exceeded pressure limit | Remove any filter clogs or | |
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| flow obstructions. Make sure | |
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| gun trigger is locked open if | |
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| using AutoClean valve. | |
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| Sprayer stops. Engine is running. | Pressure transducer faulty, | Check transducer connections | |
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| bad connection or broken | and wire. Replace transducer | |
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| wire. | or control board, if necessary. | |
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| Sprayer stops. Engine is running. | High clutch current | 1. Check clutch | |
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| head connector. Clean |
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| contacts. |
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| 2. | Measure 1.2 ±0.2Ω |
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| (GMax 3900); 1.7 ±0.2Ω |
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| (GMax 5900) across |
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| clutch field at 70_F |
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| 3. Replace clutch field as- | |
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| sembly |
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| Sprayer stops. Engine is running. | High clutch temperature | 1. If clutch is new, let spray- | |
| Display alternates E=06. |
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| er cool down and then re- |
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| start |
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| 2. | Inspect clutch. Replace |
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| clutch if there is excessive |
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| wear. |
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| 3. Remove pump pin, sepa- | |
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| rate pinion housing from |
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| clutch housing. Rotate |
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| rotor clockwise to check |
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| for excessive drag. |
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| Sprayer stops. Engine is running. | Pressure greater than | 1. Flush paint from hose be- | |
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| 2000 psi (138 bar, 14 MPa) |
| fore operating Flush Timer |
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| while in Flush Timer Mode |
| Mode |
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| 2. Verify AutoClean is acti- | |
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| vated and gun valve and |
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| prime valve are open |
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After a fault, follow these steps to restart sprayer:
1.Correct fault condition
2.Turn sprayer OFF
3.Turn sprayer ON
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