Electrical - Graco Mark V Premium Repair Manual

Troubleshooting

Electrical

Symptom: Sprayer does not run, stops running, or will
not shut off.
Perform Pressure Relief Procedure; page 9. Wait 5
minutes before servicing.
• Plug sprayer into correct voltage, grounded outlet
• Set power switch OFF for 30 seconds and then ON
again (this ensures sprayer is in normal run mode).
• Turn pressure control knob clockwise 1/2 turn
• View digital display
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 E=02
Control board status light blinks
2 times repeatedly
12
WHAT TO CHECK
See flow chart, page 17.
Check transducer or transducer
connections
Keep clear of electrical and moving parts during trou-
bleshooting procedures. To avoid electrical shock haz-
ards when covers are removed for troubleshooting, wait
5 minutes after unplugging power cord for stored elec-
tricity to dissipate.
WARNING
If no digital display is available, use control
board status light to troubleshoot prob-
lems: Turn ON/OFF switch OFF, remove
control cover and then turn power back
ON. Observe status light. Blinking LED to-
tal count equals digital error code i.e., two
blinks equals E=02.
HOW TO CHECK
1. Make sure there is no pressure in the system (see
Pressure Relief Procedure, page
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.
9
). Check fluid
3A2333B