Graco 1095 Premium Hi-Boy Instruction Manual page 15

TYPE OF PROBLEM
Sprayer does not run at all
Digital display shows E=05
Control board status light blinks
5 times repeatedly
3A0157A
WHAT TO CHECK
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
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. Set sprayer to 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. Set sprayer to OFF and spin motor fan 1/2 turn.
Restart sprayer. If sprayer runs, replace control
board. If sprayer does not run, continue to step 5.
5. Perform Spin Test: Test at large 4-pin motor field
connector. Disconnect fluid pump from sprayer. Test
motor by placing a jumper across pins 1 & 2. Rotate
motor fan at about 2 revolutions per second. A cogging
resistance to motion should be felt at the fan.
The motor should be replaced if no resistance is felt.
Repeat for pin combinations 1 & 3 and 2 & 3. Pin 4
(the green wire) is not used in this test. If all spin test
is positive, continue to step 6.
Green Blue Red Black
STEP 1:
Green Blue Red Black
STEP 2:
Green Blue Red Black
STEP 3:
Troubleshooting
15