Troubleshooting
3A4399A 23
Electrical
Symptom: Sprayer does not run, stops running, or will
not shut off.
Perform Pressure Relief Procedure; page 8.
1. Plug sprayer into correct voltage, grounded outlet.
2. Set power switch OFF for 30 seconds and then ON
again (this ensures sprayer is in normal run mode).
3. Turn pressure control knob clockwise 1/2 turn.
4. View digital display.
If there is a voltage supply issue (CODE 04, 08, or 17),
the ProGuard status light will blink continuously when the
ON/OFF switch is ON. To determine which code (or any
other code besides voltage supply) refer to the control
board status light. Turn the ON/OFF switch OFF, remove
the control cover then turn power back ON. Observe the
status light. Blinking LED total count equals the error
code (for example: two blinks equals CODE 02).
Keep clear of electrical and moving parts during trou-
bleshooting procedures. To avoid electrical shock
hazards when covers are removed for troubleshoot-
ing, wait 5 minutes after unplugging power cord for
stored electricity to dissipate.
ProGuard Status Light
Control Board Status Light
TYPE OF PROBLEM WHAT TO CHECK HOW TO CHECK
Sprayer does not run at all See flow chart, page 29.
Display is blank
ProGuard status light and
control board status light never
light
Sprayer does not run at all Check transducer or transducer
connections
1. Make sure there is no pressure in the system (see
Pressure Relief Procedure, page
8). 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.
Display shows CODE 02
Control board status light blinks
2 times repeatedly
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