Electrical Troubleshooting - Graco Mark IV 249636 Manual Del Usuario

Electrical Troubleshooting

TYPE OF PROBLEM
Sprayer does not run at all
Digital display is blank
Control board status light never
lights
Sprayer does not run at all
Digital display shows dashes
and psi icon is not blinking
Control board status light blinks
once when switch is turned on
but then stays off
Sprayer does not run at all
Digital display shows E=02
Control board status light blinks
2 times repeatedly
34
WHAT TO CHECK
If check is OK, go to next check
See flow chart, page 40.
See flow chart, page 40.
WatchDog Activated
Check transducer or transducer
connections
Cleanup / Nettoyage / Limpieza
WHAT TO DO
When check is not OK, refer to this column
Reset Watchdog
1. Make sure there is no pressure in the system (see
Pressure Relief, page 22). Check fluid path for
clogs, such as clogged filter.
2. Use airless paint spray hose with no metal braid
1/4 in. x 50 ft minimum. Smaller hose or metal braid
hose may result in high-pressure spikes.
3. Set sprayer to OFF and disconnect power to sprayer.
4. Check transducer and connections to control board.
5. Disconnect transducer from control board socket.
Check that transducer and control board contacts
are clean and secure.
6. Reconnect transducer to control board socket.
Connect power, set sprayer ON and control knob
1/2 turn clockwise. If sprayer does not run properly,
set sprayer to OFF and go to next step.
7. Install new transducer. Connect power, set sprayer
ON and control knob 1/2 turn clockwise. Replace
control board if sprayer does not run properly.
311287E