Instruction manual

Troubleshooting
22 3A1184A
Sensor Plug another sensor board into the board and
perform the zero calibration procedure. If the
machine starts to run, the sensor is bad. If
there is no replacement sensor available, use
a multi-meter to test the resistance across the
red and black wires of the sensor (be sure to
test the plug). You should read 1.5 - 3.5k
ohms. A faulty sensor usually reads no conti-
nuity (open).
If the sensor passes all the tests, see Pres-
sure Control Knob (Potentiometer).
Pressure Control Knob (Poten-
tiometer)
Plug another potentiometer (POT) into the
control board. If the machine starts, the old
POT is bad.
When a replacement POT is not available,
remove the POT lead (with the machine
turned off) from the control board and test the
resistance between the red and black wires
(be sure to test at the plug). The resistance
should read between 8-12k ohms. If it is out-
side of this range replace the POT.
If there is DC voltage at the motor brushes
and the sensor and pressure control knob are
functioning, replace the pressure control
assembly.
Problem Cause Solution
Airless Spray Gun
Problem Cause Solution
Coarse spray Low pressure Increase the pressure
Excessive fogging (overspray) High pressure Reduce the pressure to satisfactory pattern
distribution.
Material too thin Use less thinner
Pattern too wide Spray angle too large Use smaller spray angle tip
Pattern too narrow Spray angle too small Use larger spray angle tip (if coverage is OK,
try tip in same tip group)
Too much material Tip too large Use smaller tip
Material too thin Use smaller tip
Pressure too high Reduce pressure
Too little material Tip too small Use next larger tip
Material too thick