Graco 3A4133 Operation - Repair - Parts page 31

Problem
Sprayer does not run at all
AND
Display shows E=02
OR
Control board status light
blinks 2 times repeatedly
Sprayer does not run at all
AND
Display shows E=03
OR
Control board status light
blinks 3 times repeatedly
3A4187C
What to Check
Check transducer or
transducer connections
Check transducer or
transducer connections
(control board is not detecting
a pressure signal).
Troubleshooting
How to check
Make sure there is no pressure
in the system (see Pressure
Relief Procedure, page 12).
Check fluid path for clogs, such
as clogged filter.
Use airless paint spray hose
with no metal braid. A small
hose or metal braid hose may
result in high-pressure spikes.
Turn ON/OFF switch OFF and
disconnect power to sprayer.
Check transducer and
connections to control board.
Disconnect transducer from
control board socket. Check
that transducer and control
board contacts are clean and
secure.
Reconnect transducer to
control board socket. Connect
power, turn ON/OFF switch ON
and control knob 1/2 turn
clockwise. If sprayer does not
run properly, turn ON/OFF
switch OFF and go to next
step.
Install new transducer.
Connect power, turn ON/OFF
switch ON and control knob
1/2 turn clockwise. Replace
control board if sprayer does
not run properly.
Turn ON/OFF switch OFF and
disconnect power to sprayer.
Check transducer and
connections to control board.
Disconnect transducer from
control board socket. Check to
see if transducer and control
board contacts are clean and
secure.
Reconnect transducer to
control board socket. Connect
power, turn ON/OFF switch ON
and control knob to 1/2 turn
clockwise. If sprayer does not
run, turn ON/OFF switch OFF
and go to next step.
Connect a confirmed working
transducer to control board
socket.
Turn ON/OFF switch ON and
control knob to 1/2 turn
clockwise. If sprayer runs,
install new transducer. Replace
control board if sprayer does
not run.
31