Graco Mark IV Manual De Instrucciones página 28

Electrical
DIGITAL CONTROL BOARD
DISPLAY STATUS LIGHT
Displays high
pressure when
prime valve is
open and
there is no
pressure in
sprayer
E=02 Blinks 2 x repeatedly
E=03 Blinks 3 x repeatedly
E=05 Blinks 5 x repeatedly
E=06 Blinks 6 x repeatedly
E=07 Blinks 7 x repeatedly
E=09 Blinks 9 x repeatedly
E=10 Blinks 10 x repeatedly
E=11 Blinks 11 x repeatedly
E=12 Blinks 12 x repeatedly
E=13 Blinks 13 x repeatedly
28
INDICATION
- Improper pressure
signal to control
Control board is
receiving excessive
pressure signal
from transducer.
Transducer may be
damaged or fluid
flow path may be
clogged
Transducer or trans-
ducer connection
error
Possible locked
pump or drive. May
be motor connec-
tion or wiring error
Motor is too hot or
motor/thermal
device connection
may be bad
Exceeded 2000 psi
during timed flush
cycle
Motor sensor failure
High control board
temperature
Excessive motor
speed
High Current
Model not selected
WHAT TO DO
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
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
1 Check motor wiring connections
2 Check for locked or frozen pump or drive train
3 If all motor wiring connections are OK and pump/drive
train are not locked up, replace motor
1 Check all wire connections from motor to control board
2 If connections are all ok, allow sprayer to cool. If
sprayer runs when cool, correct cause of overheating.
Keep sprayer in cooler location with good ventilation.
Make sure motor air intake is not blocked
This error only occurs in flush timer mode
1 Make sure prime valve and gun are open
2 Make sure no flow obstructions or clogged filter
Make sure motor sensor (resolver) is connected to the
control board and check wiring for damage
1 Make sure the motor air intake is not blocked
2 Make sure control board is properly connected to the
back plate and that conductive thermal paste is used
on the power components, Fig. 3
Check for damaged gears or disconnected pump
1 Check for locked or frozen pump or drive train
2 Check for possible short circuits in wiring
3 Check pressure output and replace transducer if
pressure is excessive
Control board identity resistors must be properly clipped to
identify model type, manual 310657
Troubleshooting
311287C