Owens Corning 313221M, Instruction & Parts Manual

Page: 29 / 60

Troubleshooting
313221M 29
Pressure is higher on one side when
setting pressure with function knob. Pump intake valve partially plugged. Clean pump intake valve. See page
35.
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 generated
and holds on both strokes. Unequal viscosities. Change temperature setting to bal-
ance viscosities.
Change restrictor at mix point to bal-
ance back pressure.
Restriction on one side. Clean mix module.
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 33.
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 during
startup of recirculation, especially in
High Recirc mode. This is normal. Component B is typi-
cally higher viscosity than component
A until the material is heated during
recirculation. No action required.
One gauge shows half as many
pulses as the other when pumps are
cycling. Loss of pressure on downstroke. Intake valve is leaking or not closing.
Clean or replace valve; see page 35.
Loss of pressure on upstroke. Piston valve is leaking or not closing.
Clean or replace valve or packings;
see page 34.
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 38.
Failed control board. Replace board. See page 38.
A side rich; lack of B side. A side gauge is low. B side restriction downstream of
gauge. Check gun check valve
screen, mix module, or mix manifold
restrictor.
B side gauge is low. B side material supply problem.
Check B side inlet strainer and pump
intake valve.
B side rich; lack of A side. A side gauge is low. A side material supply problem.
Check A side inlet strainer and pump
intake valve.
B side gauge is low. A side restriction downstream of
gauge. Check gun check valve
screen, mix module, or mix manifold
restrictor.
PROBLEM CAUSE SOLUTION