Graco CycleFlo [10/18] Troubleshooting
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Graco CycleFlo [10/18] Troubleshooting

Graco CycleFlo [10/18] Troubleshooting
10 309003
Troubleshooting
The following is a list of possible problems and their causes. The CycleFlo also has a built-in self-test mode that
allows dynamic testing of all components.
Troubleshooting Guide
Problem
Cause Solution
No operation at all
Blown fuse. Check fuse and replace with 250 V
750 mA type.
Emergency Stop switch OFF. Press switch.
LED display shows incomplete
digits
Poor ribbon cable connection. Turn power off and unplug then re-
plug ribbon cable on main board and
display board.
Damaged display board. Replace board.
Front panel button(s) don’t work
Poor ribbon cable connection. Turn power off and unplug then re-
plug ribbon cable on main board and
display board.
Loose mounting screw. Make sure mounting screws on dis-
play board are securely tightened.
Damaged display board. Replace board.
Pump won’t operate when RUN
button is pressed
Incorrect operating mode. Make sure SW1–6, 7, 8 are all in the
OFF position.
p
No or low air supply. Check air supply to make sure there
is sufficient pressure and air avail-
able.
Pump won’t operate (cycles count
down and valve driver LED’s
blink)
Bad solenoid wire connections. Turn off power and check wire con-
nections from solenoid valve #1 and
#2 to make sure they are all con-
nected and seated properly.
Bad solenoid valve(s). Turn off air supply and listen for
“clicking” on solenoid valves; replace
valves if no “clicking” is audible.
Pump won’t operate (CYCLES
count down but no valve driver
LED’s)
Bad valve drivers on main board. Replace main board.

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