Troubleshooting
3A1602J
Pressure is higher on one side
when setting pressure with function
knob.
Pump intake valve partially plugged. Clean pump intake valve. See page
34.
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.
Check that A and B chemicals are
within the chemical manufacturer
ʼ
s
specified application temperature
range.
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
ʼt
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 typ-
ically higher viscosity than compo-
nent 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 downstoke.
Intake valve is leaking or not clos-
ing. Clean or replace valve; see
page 34.
Loss of pressure on upstoke.
Piston valve is leaking or not clos-
ing. Clean or replace valve or pack-
ings; 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 37.
Failed control board.
Replace board. See page 37.
Problem
Cause
Solution
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PAGE 34
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FLEECEBACK & INSULATION MOBILE ADHESIVE DISPENSING CART
Summary of Contents for P-55
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