Graco EcoQuip 300, Operation, Repair, And Parts

Page: 25 / 46

Troubleshooting
Problem Problem
Problem
Cause Cause Cause Solution Solution Solution
The unit is not on a level surface. Place the unit on a level surface. If this
is impossible, the Auto-Vent must be on
the higher side of the unit.
The initial pot pressure is not set
correctly. Confirm that the auto-vent valve is
working and set initial pot pressure 30
psi (2.0 bar, 0.20 MPa) above the blast
pressure.
The Auto-Vent is malfunctioning. Perform auto-vent clean-
ing procedure (see
Cleaning the Auto-Vent Valve, page 31 ).
A strong hose recoil occurs
frequently when the blast
control switch is engaged.
The diaphragm needs to be
flushed. Perform the diaphragm
flush procedure (see
Flushing the Diaphragm Valve, page 29 ).
If flushing does not solve the problem, see
Repairing the Diaphragm Valve, page 30 .
334143C 25