Graco Reactor E-10 Instructions-Parts List Manual page 30

PROBLEM
Pressure is higher on one side
when setting pressure with func-
tion knob.
Pressures are not balanced when
running, but pressure is gener-
ated and holds on both strokes.
Fluid leak in pump packing nut
area.
Pressure doesn't hold when
stalled against gun in spray
mode.
Pressure is higher on B side dur-
ing startup of recirculation, espe-
cially in High Recirc mode.
One gauge shows half as many
pulses as the other when pumps
are cycling.
Status indicator (red LED) not lit. Motor Power switch off.
A side rich; lack of B side.
30
CAUSE
Pump intake valve partially
plugged.
Air in hose. Fluid is compressible. Purge air from hose.
Unequal size hoses or unequal
hose construction.
Unequal viscosities.
Restriction on one side.
Worn throat seals.
Leaking Recirc/Spray valve.
Leaking piston valve or intake
valve in displacement pump.
Leaking gun shutoff.
This is normal. Component B is
typically higher viscosity than
component A until the material is
heated during recirculation.
Loss of pressure on downstoke.
Loss of pressure on upstoke.
Loose indicator cable.
Failed control board.
A side gauge is low.
B side gauge is low.
Troubleshooting
SOLUTION
Clean pump intake valve. See
page 37.
Use matching hoses, or balance
pressures before spraying.
Change temperature setting to
balance viscosities.
Change restrictor at mix point to
balance back pressure.
Clean mix module or restrictor at
mix manifold.
Clean gun check valve screens.
Replace. See pump manual.
Repair, page 36.
Repair. See pump manual.
Repair. See gun manual.
No action required.
Intake valve is leaking or not clos-
ing. Clean or replace valve; see
page 37.
Piston valve is leaking or not clos-
ing. Clean or replace valve or
packings; see page 37.
Cycle Motor Power off
then on to reset breaker.
Check that cable is connected at
J10 pins 1 (red) and 2 (black) on
control board. See page 42.
Replace board. See page 42.
B side restriction downstream of
gauge. Check gun check valve
screen, mix module, or mix mani-
fold restrictor.
B side material supply problem.
Check B side inlet strainer and
pump intake valve.
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313221A