Pressure Control
Digital Display Messages
WARNING
Relieve pressure before repair, page 5.
•Digital messages are not available on all sprayers
•Blinking LED total count equals digital error code i.e., two blinks is the same as E=02
DISPLAY* | SPRAYER OPERATION | INDICATION |
| ACTION |
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No Display | Sprayer may be pressurized | Loss of power or display not | Check power source. Relieve pressure before | |
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| connected | repair or disassembly. 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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ti6314a |
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psi | Sprayer is pressurized. Power is | Normal operation | Spray | |
applied. (Pressure varies with tip |
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bar | size and pressure control setting.) |
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MPa |
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ti6315a |
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| Sprayer stops. Engine is running. | Exceeded pressure limit | 1. | Check fluid path for clogs, such as clogged |
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| filter |
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| 2. | Open prime valve and gun if running |
ti6316a |
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| AutoClean |
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| 3. | Use Graco paint hose, 1/4 in. x 50 ft |
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| minimum. Smaller hose or metal braid |
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| hose may result in pressure spikes. |
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| 4. | Replace transducer if fluid path is not |
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| clogged and proper hose is used. |
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| Sprayer stops. Engine is running. | Pressure transducer faulty, | 1. | Check transducer connection |
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| bad connection or broken | 2. | Disconnect and reconnect transducer plug |
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| wire |
| to ensure good connection with control |
ti6317a |
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| board socket |
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| 3. | Open prime valve. Replace sprayer |
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| transducer with known good transducer |
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| and run sprayer. Replace transducer if |
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| sprayer runs or control board if sprayer |
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| does not run. |
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| Sprayer stops. Engine is running. | High clutch current | 1. | Check wiring connections. |
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| 2. | Measure: 1.2 +0.2Ω (GMAX II 3900); |
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| 1.7 +0.2Ω (GMAX II 5900/ 7900 & |
ti6318a |
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| TexSpray 7900HD) |
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| across clutch field at 70°F |
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| 3. | Replace clutch field assembly |
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| Sprayer stops. Engine is running. | Loss of paint to pump or | 1. | Check for empty paint condition, clogged inlet |
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| severe pressure loss |
| strainer, failed pump or severe leak |
(with constant |
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| 2. | Reduce pressure and turn pump switch |
green LED) |
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| OFF and ON to restart pump |
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| 3. | WatchDog function can be deactivated by |
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| turning WatchDog switch OFF |
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| Sprayer stops. Engine is running. | Pressure greater than | 1. | Open prime valve and gun |
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| 2000 psi (138 bar, 14 MPa) | 2. | Verify no flow obstructions or clogged filter |
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| while in Flush Timer Mode |
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ti6320a |
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*Error codes also appear on control board as a blinking red LED. LED is an alternate to digital messages.
1.Remove two screws (71) and swing down cover (130).
2.Start engine. Blink count is the same as error code(E=0X).
After a fault, follow these steps to restart sprayer:
1.Correct fault condition
2.Turn sprayer OFF
3.Turn sprayer ON
310893L | 15 |
