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8
307–760
TROUBLESHOOTING GUIDE
Pressure
Relief Procedure
To
reduce the risk of serious bodily injury
, including
injury from moving parts or electric shock, always
follow
this procedure whenever you shut of
f the
sys
-
tem,
when checking or servicing any part of the sys
-
tem,
and whenever you stop painting.
1. T
urn the ON/OFF switch to OFF
.
2. Unplug the power supply cord.
3. T
rigger the roller valve to relieve pressure.
If
you suspect that pressure is not fully relieved after
following
the steps above, open the priming valve
2
turns
counterclockwise.
WARNING CAUTION
Thoroughly flush the system after each use to re-
duce
down time and costly repair bills.
NOTE:
If you are not able to determine the cause of
the
problem, or the problem and solution is not
dis
-
cussed
in this chart, return the system to an au
-
thorized
service agencyfor repair
.
PROBLEM CAUSE SOLUTION
Pump
will not prime or primes slowly
Clogged suction tube strainer
Clean.
Paint too thick
Thin; try pouring paint into suction tube;
use
3/8 in. ID hose if necessary
.
Outlet valve spring worn
Pour
paint into suction tube and try to prime
system.
If it doesn’t prime in one minute, re
-
place
the outlet valve spring. See page 1
1.
Inlet
valve stuck or damaged.
Depress inlet valve gently and pour in
about 1 teaspoon mineral spirits. Try to
prime pump. Replace inlet valve if neces-
sary.
See page 10.
Loose inlet hose nut
Tighten.
Pump wil not start
Power cord unplugged
Plug in.
ON/OFF switch turned off T
urn on.
Damaged motor
Replace. See page 13.
Fuse burned out.
Replace.
See page 10. If it burns out
again
quickly,
return the system for repair
.
Low paint flow or no paint flow
. Clogged roller valve, diffuser, roller frame,
roller
valve or hose
Clean
thoroughly
after each use. See page
6.
Using
more than 7.6 m (25 ft) of
1/4 in. ID hose
Use up to 30 m (100 ft) of 3/8 in. ID hose.
See
CAUTION
on page 17.
Loose inlet hose nut
Tighten.
W
orn priming valve
Replace. See page 12.
Priming valve is open
Close.
Paint too thick
Thin.
Damaged pressure switch
Replace. See page 1
1.
W
orn inlet and/or outlet valve
Replace. See page 1
1.
Pump runs after roller valve trigger is
released.
Worn pressure switch
Replace. See page 1
1.
W
orn inlet valve
Replace. See page 1
1.
W
orn priming valve
Replace. See page 12.
W
orn roller valve packings or needle
Repair
. See page 9.
DEPRESS LIGHTLY.
POUR IN 1 TEASPOON
MINERAL SPIRITS