Graco 3A4133 Operation - Repair - Parts page 32

Troubleshooting
Problem
Sprayer does not run at all
AND
Display shows E=04
OR
Control board status light
blinks 4 times repeatedly
Sprayer does not run at all
AND
Display shows E=05
OR
Control board status light
blinks 5 times repeatedly
32
What to Check
Check voltage supply to the
sprayer (control board is
detecting a multiple voltage
surges).
Control is commanding motor
to run but motor shaft does not
rotate. Possibly locked rotor
condition, an open connection
exists between motor and
control, there is a problem with
motor or control board, or
motor amp draw is excessive.
How to check
Turn ON/OFF switch OFF and
disconnect power to sprayer.
Locate a good voltage supply
to prevent damage to
electronics.
1.Remove pump and try to run
sprayer. If motor runs, check
for locked or frozen pump or
drive train. If sprayer does
not run, continue to step 2.
2.Turn ON/OFF switch OFF
and disconnect power to
sprayer.
3.Disconnect motor
connector(s) from control
board socket(s). Check that
motor connector and control
board contacts are clean and
secure. If contacts are clean
and secure, continue to step
4.
4.Connect a DC voltmeter
across the two motor wires –
red & black spin the motor
fan and check for a voltage to
register on the meter. If
voltage is not present, check
brushes. If OK, replace
motor. If voltage is present,
go to step 5.
5.Perform a spin test by
connecting a 9 –12 Volt
battery to the motor leads.
Motor leads may vary in style
and size. Locate the two
wires going to the carbon
brushes normally Red and
Black. Motor should spin
when battery is connected to
the motor leads.
BLACK (-)
RED (+)
9-VOLT
BATTERY
YELLOW
ti24722a
3A4187C