Graco Reactor E-10hp Instructions Manual page 37

PROBLEM
One side doesn't come up to
pressure 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.
Pressure doesn't hold when
stalled against gun in spray mode.
Pressure is higher on RES side
during 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.
ISO side rich; lack of RES side.
332144H
CAUSE
Low fluid in the tank.
Dirty or damaged Spray valve.
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.
Worn throat seals.
Leaking 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 recirculation.
Loss of pressure on downstoke.
Loss of pressure on upstoke.
The function knob is not set to Park
when power is applied.
Loose indicator cable.
Failed control board.
Shorted pressure transducer or
potentiometer input.
ISO side gauge is low.
RES side gauge is low.
SOLUTION
Refill.
Clean or repair. See Replace Spray
Valves, page 40.
Clear. See Maintenance, page 25.
Clean the pump intake valve. See
Remove Intake Valve Only, page 41.
Warm the material before adding to the
tanks.
Clean the pump intake valve. See
Remove Intake Valve Only, page 41.
Purge air from the hose.
Use matching hoses, or balance
pressures before spraying.
Change the temperature setting to
balance viscosities.
Change the restrictor at mix point to
balance back pressure.
Clean the mix module or restrictor at
the mix manifold.
Clean the gun check valve screens.
Replace. See pump manual.
Repair. See Replace Spray Valves,
page 40.
Repair. See you pump manual.
Repair. See you gun manual.
No action required.
The intake valve is leaking or not
closing. Clean or replace valve. See
Replace Spray Valves, page 40.
The piston valve is leaking or not
closing. Clean or replace the valve or
packings. See Replace Spray Valves,
page 40.
Turn the function knob to Park.
Check that the cable is connected at J3
on the top motor control board. See F
12, page 45.
Replace the board. See Motor Control,
page 44.
See Control Board LEDs, page 44 for
troubleshooting.
RES side restriction downstream of the
gauge. Check the gun check valve
screen, mix module, or mix manifold
restrictor.
RES side material supply problem.
Check RES side inlet strainer and pump
intake valve.
Troubleshooting
.
IG
37