Graco Reactor E-10hp Instructions Manual page 38

Troubleshooting
PROBLEM
One side doesn't come up to pres-
sure in spray mode.
Pressure is higher on one side when
setting pressure with function knob.
Pressures are not balanced when
running, but pressure is generated
and holds on both strokes.
Fluid leak in pump packing nut area. Worn throat seals.
Pressure doesn't hold when stalled
against gun in spray mode.
Pressure is higher on RES side dur-
ing startup of recirculation, especially
in High Recirc mode.
One gauge shows half as many
pulses as the other when pumps are
cycling.
Status indicator not lit.
38
CAUSE
Low fluid in tank.
Dirty or damaged Recirc/Spray valve. Clean or repair, page 41.
Plugged fluid inlet strainer.
Pump intake valve plugged or stuck
open.
Material is too viscous to pump.
Pump intake valve partially plugged.
Air in hose. Fluid is compressible.
Unequal size hoses or unequal hose
construction.
Unequal viscosities.
Restriction on one side.
Leaking Recirc/Spray valve.
Leaking piston valve or intake valve
in displacement pump.
Leaking gun shutoff.
This is normal. RES is typically
higher viscosity than ISO until the
material is heated during recircula-
tion.
Loss of pressure on downstoke.
Loss of pressure on upstoke.
Function knob is not set to Park/Off
when power is applied.
Loose indicator cable.
Failed control board.
Shorted pressure transducer or
potentiometer input.
SOLUTION
Refill.
Clear, see page 25.
Clean pump intake valve. See page
42.
Warm material before adding to
tanks.
Clean pump intake valve. See page
42.
Purge air from hose.
Use matching hoses, or balance
pressures before spraying.
Change temperature setting to bal-
ance viscosities.
Change restrictor at mix point to bal-
ance back pressure.
Clean mix module or restrictor at mix
manifold.
Clean gun check valve screens.
Replace. See pump manual.
Repair, page 41.
Repair. See pump manual.
Repair. See gun manual.
No action required.
Intake valve is leaking or not closing.
Clean or replace valve; see page 41.
Piston valve is leaking or not closing.
Clean or replace valve or packings;
see page 41.
Turn function knob to Park/Off.
Check that cable is connected at J3
on top motor control board. See page
46.
Replace board. See page 45.
See Control Board LEDs, page 45
for troubleshooting.
332144E