Possible Problems And Solutions - Graco Horizon Fluid Management Systems Instructions Manual

Installation and Troubleshooting Tips
1. The correct ready light comes on but
no fluid flows.
a. Make sure the valves in the fluid line are open.
b. Check the filters and other plumbing compo-
nents for clogs.
NOTE: The fluid lines should have been
flushed out prior to installing the system.
c. If the nozzle twists to open, verify it is in the
open position.
d. Verify that there is air pressure to the pump.
e. The proper air solenoid is activated by the job
request (for example, if oil is requested, only
the oil pump air solenoid should be on).
f. The air pressure regulator is set correctly.
g. The necessary valves are open.
h. Check if fluid is available at some other dis-
pense point.
Use DIP Switch #8 on the control module the
air solenoids are attached to pressurize the
pumps. Then use Switch #8 or the DIAGNOS-
TICS " SOLENOIDS to selectively check
out each dispense point. Reference the infor-
mation under Solenoids on page 64.
If none of the dispense points operate, the
problem is at the pump room end.
If only one dispense point is not operating, the
problem is at the dispense point. Follow the
next step.
i. If after completing the above checks there is
still no fluid flow to a specific dispense point,
begin at the upstream end of the dispense
point hardware (typically a ball valve or check
valve) and check each component to deter-
mine where the problem is.
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Possible Problems and Solutions

2. A different ready light comes on than
the one expected, and fluid flows at the
dispense point indicated by the light.
Check for proper light/solenoid activation, using
DIAGNOSTICS " SOLENOIDS. Reference the
procedure under Solenoids on page 64.
If the light/solenoid activates correctly, the system
configuration entered during programming is
wrong. Check the ASSIGN CONNECTIONS table
(see page 34) versus the actual wiring in the shop.
If the light/solenoid does not activate correctly, at
the location of the problem, then the wiring itself is
wrong. Check your floor plan versus the cabling
connections.
3. A different ready light comes on than
the one expected, but fluid flows at the
expected point.
The ready light is wired to the wrong fluid solenoid.
Check your wiring and correct it.
4. The correct ready light glows and fluid
flows, but there is no automatic shut-
off.
This could be caused by one of two problem:
a. The appropriate meter is not sending pulses.
Reference the information under Meters on
page 65.
b. The system configuration information was
entered incorrectly, so the system is monitoring
the wrong meter for the fluid/dispense point.
Using SETUP " MODIFY SETUP, check
both the meter number entry on the ASSIGN
CONNECTIONS table (see page 34) and the
control module and port number entries in the
METER CALIBRATION table (see page 35).