AIRLESSCO LP460 Service & Operation Manual page 31

ELECTRICAL BOARD CALIBRATION
4. PHASE LIMIT TRIMPOT CALIBRATION
Formerly known as the Low Voltage or Master Voltage Calibration
1. Attach a 50', 1/4" airless hose, airless gun with .017 tip and a 5000 psi glycerin filled pressure gauge to the
pump.
2. Place the suction tube into a bucket of Pump Conditioner and water.
3. Turn pump ON and turn up pressure control until the machine starts to prime.
4. Place the prime/pressure relief valve in the pressure (closed) position.
5. Pressurize pump to 600 psi.
6. Trigger the gun several times noting the deadband (the amount of pressure drop before the pump rebuilds to
set pressure).
7. If deadband is greater than 100 psi, adjust the low pressure voltage trimpot so that the deadband is less than
100 psi and the pressure increase after the gun trigger is released is less than 200 psi. These pressures are
guidelines and may vary slightly from pump to pump.
8. Reattach Pressure Control Assembly being careful not to pinch wires.
Note: The 331-315-99 pressure control assembly has a reddish brown terminal labelled
"Inhibit Switch". At all times there should be a jumper on the two left terminals,
which are the closest to the "S2" connection. Also on the Revision E is a
terminal labelled "ON-SL". This terminal should never have a jumper on it.
(CONTINUED)
29