Graco T-MAX 506, Operation - Repair - Parts

Page: 43 / 88

Repair
3A6748B 43
Repair
Control Board Diagnostics
1. Perform Pressure Relief Procedure ,
page 19 .
NOTE: Do not allow sprayer to develop fluid
pressure without transducer installed. Leave
pump outlet open if test transducer is used.
2. Observe display messages in the
following table.
3. Observe LED operation and reference
the following table.
Display
Control
board status
LED Blinks Spray Operation Indicates What to Do
No Display Never blinks Spray stops. Power is not
applied. Sprayer must be
pressurized.
Loss of power. Check power source. Perform
Pressure Relief Procedure ,
page 19 , before repair or
disassembly.
psi/bar/MPa Once Sprayer is pressurized. Power is
applied. (Pressure varies with tip
size and pressure control
setting.)
Normal operation. Do nothing.
E=02
CODE 02 Two times
repeatedly
Sprayer may continue to run.
Power is applied.
Run away pressure.
Pressure greater
than 1500 psi (103
bar, 10.3 MPa) or
damaged pressure
transducer.
Replace motor control board
or pressure transducer.
E=03
CODE 03 Three times
repeatedly
Sprayer shuts down and LED
continues to blink three times
repeatedly
Pressure transducer
is faulty or missing.
Check transducer connection.
Open drain valve. Substitute
new transducer for transducer
in sprayer. If sprayer runs,
replace transducer.
E=04
CODE 04 Four times
repeatedly
Sprayer does not operate. Control board is
detecting multiple
voltage surges.
Check voltage switch, ensure
it is in the right voltage setting
for the voltage being used. Set
Sprayer to OFF and
disconnect power to sprayer.
Locate a good voltage supply
to prevent damage to
electronics.
E=05
CODE 05 Five times
repeatedly
Sprayer does not start or stops
and LED continues to blink five
times repeatedly. Power is
applied.
Motor fault. Check for locked rotor,
shorted wiring or
disconnected motor. Repair or
replace failed parts.
E=06
CODE 06 Six times
repeatedly
Sprayer stops and LED blinks six
times repeatedly. Power is
applied.
Motor is too hot or
there is a fault in
motor thermal
device.
Allow sprayer to cool. If
sprayer runs correctly when
cool, check motor fan function
and air flow. Keep sprayer in
cool location. If sprayer does
not run when cool and
continues to blink six times,
replace motor.