Graco 248037 Repair Manual page 8

Electrical
DIGITAL CONTROL BOARD-
STATUS LIGHT
DISPLAY
Displays high
pressure
when prime
valve is open
and there is
no pressure in
sprayer.
E=02 Blinks 2 x repeat-
edly
E=03 Blinks 3 x repeat-
edly
8
309941
Troubleshooting
INDICATION
– Improper pressure
signal to contro
Control board is re-
ceiving excessive
pressure signal
from transducer.
Transducer may be
damaged or fluid
flow path may be
clogged.
Transducer or
transducer connec-
tion error
WHAT TO DO
Open prime valve. Connect a known good trans-
l ducer in place of the sprayer transducer. Set
sprayer ON. Replace transducer If sprayer runs.
Replace control board If sprayer does not run.
1. Check fluid path for clogs, such as a clogged
filter.
2. Open prime valve and gun if running AutoClean.
3. 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.
4. Replace transducer if fluid path is not clogged
and proper hose is used.
1. Check transducer connection
2. Disconnect and reconnect transducer plug to
ensure good connection with control board
socket. Check that transducer contacts are ok.
3. Open prime valve. Connect a known good
transducer in place of the sprayer transducer.
Set sprayer ON. Replace transducer If sprayer
runs. Replace control board If sprayer does not
run.