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Digital Display Messages
332919C 31
Digital Display Messages
• 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
* 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
DISPLAY* SPRAYER OPERA-
TION
INDICATION ACTION
No Display Sprayer may be
pressurized.
Loss of power or display
not connected.
Check power source. Relieve pressure before repair
or disassembly. Verify display is connected.
Sprayer may be
pressurized.
Pressure less than
200 psi (14 bar, 1.4 MPa).
Increase pressure as needed.
Sprayer is pressurized.
Power is applied.
(Pressure varies with
tip size and pressure
control setting).
Normal operation. Spray
Sprayer stops. Engine
is running.
Exceeded pressure limit. 1. Check fluid path for clogs, such as clogged filter.
2. Open prime valve and gun if running AutoClean.
3. Use Graco paint hose, 1/4 in. x 50 ft minimum.
Smaller hose or metal braid hose may result in
pressure spikes.
4. Replace transducer if fluid path is not clogged
and proper hose is used.
Sprayer stops. Engine
is running.
Pressure transducer faulty,
bad connection or broken
wire.
1. Check transducer connection.
2. Disconnect and reconnect transducer plug to
ensure good connection with control board
socket.
3. Open prime valve. Replace sprayer transducer
with known good transducer and run sprayer.
Replace transducer if sprayer runs or control
board if sprayer does not run.
Sprayer stops. Engine
is running.
High clutch current. 1. Check wiring connections.
2.
Measure: 1.2 + 0.2
Ω
(GMAX II 3900);
1.7 + 0.2 Ω (GMAX II 5900/ 7900 & TexSpray
7900HD) across clutch field at 70°F.
3. Replace clutch field assembly.
(with constant
green LED)
Sprayer stops. Engine
is running.
Loss of paint to pump or
severe pressure loss.
1. Check for empty paint condition, clogged inlet
strainer, failed pump or severe leak.
2. Reduce pressure and turn pump switch OFF
and ON to restart pump.
3. WatchDog function can be deactivated by
turning WatchDog switch OFF.
Sprayer stops. Engine
is running.
Pressure greater than
2000 psi (138 bar, 14 MPa)
while in Flush Timer Mode.
1. Open prime valve and gun.
2. Verify no flow obstructions or clogged filter.