Graco 273199 Repair Parts page 16

Repair
Calibration
NOTE: The motor (A) must be de-coupled from the
pump and must be able to cycle freely with no
obstructions.
1. Cycle power to the motor by first turning the sprayer
power switch (E) to OFF, and then to ON again.
2. Wait for the status indicator LED (L) to turn on solid or
start blinking.
3. Within 30 seconds, rapidly turn the pressure
adjustment knob (H) back and forth from 0 to 10 at
least five times and then set the knob back to 0. If the
status indicator LED (L) was solid before, it will begin
blinking an encoder calibration error (code 8) during
the calibration process.
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4. The motor shaft (MS) will run up and down slowly
5. Midway through the auto-calibration process, the
H
L
6. The motor shaft (MS) will rapidly move up and down
7. Make sure the auto-calibration process is complete
over the course of several minutes.
motor shaft (MS) will pause as it moves to the next
step.
5-6 times.
before continuing. Wait for the status indicator LED
(L) to stop blinking.
3A7940A