Troubleshooting
311075R 35
Pressure is higher on one side
when setting pressure with func-
tion knob.
Pump intake valve partially
plugged.
Clean pump intake valve. See
page 41.
Air in hose. Fluid is compressible. Purge air from hose.
Unequal size hoses or unequal
hose construction.
Use matching hoses, or balance
pressures before spraying.
Pressures are not balanced when
running, but pressure is gener-
ated and holds on both strokes.
Unequal viscosities. Change temperature setting to
balance viscosities.
Change restrictor at mix point to
balance back pressure.
Restriction on one side. Clean mix module or restrictor at
mix manifold.
Clean gun check valve screens.
Fluid leak in pump packing nut
area.
Worn throat seals. Replace. See pump manual.
Pressure doesn’t hold when
stalled against gun in spray
mode.
Leaking Recirc/Spray valve. Repair, page 40.
Leaking piston valve or intake
valve in displacement pump.
Repair. See pump manual.
Leaking gun shutoff. Repair. See gun manual.
Pressure is higher on B side dur-
ing startup of recirculation, espe-
cially in High Recirc mode.
This is normal. Component B is
typically higher viscosity than
component A until the material is
heated during recirculation.
No action required.
Resin froths and overflows tank
after refilling hot equipment.
Agitation from pouring. Hot mate-
rial in heaters and hoses froths
when not under pressure.
Turn heaters off before refilling.
Leave hoses pressurized. See
page 24.
One gauge shows half as many
pulses as the other when pumps
are cycling.
Loss of pressure on downstoke. Intake valve is leaking or not clos-
ing. Clean or replace valve; see
page 41.
Loss of pressure on upstoke. Piston valve is leaking or not clos-
ing. Clean or replace valve or
packings; see page 41.
Status indicator (red LED) not lit. Motor Power switch off.
Cycle Motor Power off ,
then on to reset breaker.
Loose indicator cable. Check that cable is connected at
J10 pins 1 (red) and 2 (black) on
control board. See page 46.
Failed control board. Replace board. See page 46.
PROBLEM CAUSE SOLUTION
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