Graco Ultra Max II 795 Repair Manual page 9

Electrical
DIGITAL CONTROL BOARD
STATUS LIGHT
DISPLAY
E=05
Blinks 5 x repeat-
edly
E=06
Blinks 6 x repeat-
edly
E=07
Blinks 7 x repeat-
edly
E=09
Blinks 9 x repeat-
edly
E=10
Blinks 10 x repeat-
edly
E=11
Blinks 11 x repeat-
edly
E=12
Blinks 12 x repeat-
edly
E=13
Blinks 13 x repeat-
edly
EMPTY
–
Troubleshooting
INDICATION WHAT TO DO
Possible locked 1. Check motor wiring connections
pump or drive. May
be motor connection
2. Check for locked or frozen pump or drive train
or wiring error.
3. If all motor wiring connections are OK and pump/
Motor is too hot or 1. Check all wire connections from motor to control
motor/thermal de-
vice connection may
be bad.
2. If connections are all ok, allow sprayer to cool. If
Exceeded 2000 psi
during timed flush
cycle
1. Make sure prime valve and gun are open
2. Make sure no flow obstructions or clogged filter
Motor sensor failure
High control board 1. Make sure the motor air intake is not blocked
temperature
2. Make sure control board is properly connected to
Excessive motor
speed
High Current 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
Model not selected
EMPTY on digital 1. Check for empty paint condition, clogged inlet
display indicates a
loss of paint to the
pump or a severe
loss in pressure
2. WatchDog feature can be deactivated. See Opera-
drive train are not locked up, replace motor
board
sprayer runs when cool, correct cause of overhea-
ting. Keep sprayer in cooler location with good
ventilation. Make sure motor air intake is not
blocked.
This error only occurs in flush timer mode
Make sure motor sensor (resolver) is connected to
the control board and check wiring for damage
the back plate and that conductive thermal paste
is used on the power components, Fig. 3
Check for damaged gears or disconnected pump
pressure is excessive
Control board identity resistors must be properly
clipped to identify model type, manual 309709
strainer, failed pump or severe leak. Turn pressure
control knob to zero to restart sprayer.
tion Manual.
9
309941