Electrical Board Calibration - 5/6 Series - AIRLESSCO LP460 Service & Operation Manual

ELECTRICAL BOARD CALIBRATION (5/6 Series)
Note: Anytime a sensor, pressure control assembly (board) or both are replaced,
1. ZERO CALIBRATION
1. Place prime/pressure relief valve in the prime (open) position.
2. Set the pressure control knob to the minimum setting (CCW).
3. Remove the screws and lower the pressure control assembly.
4. Ensure the jumper is on the "P-ZR" terminal. Note: This jumper comes with a new pressure control assembly
(board) and is installed on the "P-ZR" terminals. If you are "Zero Calibrating" a pressure control assembly
presently in the unit, remove jumper from single terminal P-ZR and place on both terminals P-ZR. When Zero
Calibration is complete, replace jumper on a single terminal of P-ZR.
5. Turn machine "ON" and ensure it is not cycling.
6. If the yellow zero light on the electrical board is ON, use an insulated screwdriver to turn the "ZERO" trimpot
counter-clockwise until the light goes out. Then turn it clockwise until the light just comes back on. If so
equipped, look at the LCD Display and if "0000" is showing the Zero Calibration is complete. If the display
shows more than "0000", turn the Zero Trimpot CCW until "0000" is showing. If "-- -- --" is showing, turn the
zero trimpot CW until "0000" is displayed.
7. If the yellow light is OFF, turn the "Zero" trimpot clockwise, just until the light comes on and stop. Confirm
"0000" is displayed.
NOTE: If the yellow light remains constantly "ON", or "OFF" during this calibration, the sensor
8. IMPORTANT:When calibration is complete, move jumper from both "PZ-R" terminals to single terminal
on P-ZR.
2. PRESSURE CALIBRATION
1. Complete the ZERO calibration, as per "ZERO CALIBRATION" prior to commencing this calibration.
2. Attach a 50', 1/4" airless hose, airless gun with 0.017 tip and a 5000 psi glycerin filled pressure gauge to the pump.
3. Place the suction tube into a bucket of Coro-chek and water.
4. Turn prime/pressure relief valve to the prime (open) position.
5. Turn pressure control knob clockwise until machine starts to prime.
6. Place the prime/pressure relief valve in the pressure (closed) position.
7. While watching pressure gauge, slowly adjust the pressure trimpot (clockwise to increase and counterclockwise
to decrease) until the maximum static pressure is 3000 psi, with the pressure control knob fully clockwise.
Trigger the gun several times to ensure pressure returns to 3000 psi.
3. LIQUID CRYSTAL DISPLAY (LCD) CALIBRATION
1. Complete the "ZERO CALIBRATION" and "PRESSURE CALIBRATION" procedures prior to commencing
this calibration.
2. Turn pressure control knob up until system pressure is above 2500 psi (as indicated on glycerin filled pressure
gauge) and the machine is not cycling.
3. Use an insulated screwdriver to adjust the Set trimpot. Turn trimpot CCW until it clicks, then adjust to match
pressure against pressure gauge reading.
4. Move the pressure control knob to different settings and trigger the gun several times to ensure that the LCD
continues to match the pressure gauge reading.
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the following calibrations must be performed.
is defective and should be replaced.
( If so equipped)