Only One Motor Operates
From the home screen touch the gear icon at the bottom, choose the heart beat icon, Password 76543210 then press enter.
Put an open ended hose/fitting on the red banded service hose and insert it into a waste container.
Locate M1F/R and M2F/R on the diagnostic screen, press and hold one button at a time to see which motor is not operating.
Note: M1F/R is the new fluid motor/pump assembly at the back of the machine.
M2F/R is the used fluid motor/pump assembly at the front of the machine.
Remove the top of the machine and set it forward to gain access to the electrical connectors for the motors at the drive board.
Unplug and swap the motor leads at the drive board. The new and used motor controls will now be reversed.
Note: The drive board is labeled "New" & "Used" underneath where the motors plug into the board.
Go back to the home screen and touch the gear icon at the bottom, choose the heart beat icon, Password 76543210 then press enter
Use the appropriate M1F/R or M2F/R to see if the motor operates from the opposite control.
If the motor operates from the opposite controls then you should replace the Drive Board.
Drive Board Part #
1401/1402 - PXT-011
1403/1404/1405 - E101-1028
If the motor does not operate from the opposite control, then replace the motor assembly.
Neither Motor Operates
From the home screen touch the gear at the bottom, choose the heart beat icon, Password 76543210 then press enter.
Put an open ended hose/fitting on the red banded service hose and insert it into a waste container.
Locate M1F/R and M2F/R, press and hold the buttons one at a time to run the pumps.
Locate the S button and press it repeatedly to actuate the solenoid.
If neither pump runs and the solenoid does not actuate, remove the top of the machine to gain access to the drive board.
Note: If the solenoid activates from the diagnostic screen, replace the drive board and re-test.
If neither pump or the solenoid operates, locate the red and black motor wire leads that attach to the drive board, and unplug them.
Supply 12 volts to the motor leads to verify both motors run.
If both motors run with 12V applied directly to them, replace the PLC.
Checking The Bypass Solenoid
Used Fluid Tank Fills When In Bypass Mode
Check the wiring to make sure the wires are connected in the proper location on the drive board. (Specifically verify the wires from the solenoid are plugged into the right location)
Check to see if the solenoid operates, refer to solenoid operation section.
If the solenoid is stuck clean the solenoid and retest.
If the bypass solenoid is still not operating properly replace it.
Screen Does Not Power On or Shuts Off During Service
Check fuse or diode. On 1403 & above machines, the fuse is located in line with the power cord where it connects to the driveboard.
Check the source voltage, the 1401 &1402 machine operating voltage is 11.5 volts to 14.5 volts DC.
Note: If you are on the low side of the voltage scale and the pumps turn on it can drop the voltage below the operating range causing the screen to turn off.
Check the voltage at the drive board where the power cord attaches, this should match source voltage.
If it does not match source voltage, replace the power cord and re-test.
Check the voltage coming out of the driveboard running to the power inverter, this is two black wires, you should have source voltage here.
If it does not match source voltage, replace the driveboard and re-test.
Check the voltage going from the power inverter to the PLC, this is the two purple wires. The voltage here should be 120 volts AC.
If there is not 120 volts output on the purple wires, replace the power inverter part # PXT-007 and re-test.
Note: On 1403 & above machines, the power inverter is integrated into the drive board. If you have good power going into the driveboard and the fuse is good, then replace the driveboard and re-test.
Pump Runs, But Does Not Move Fluid
Remove the front panel from the machine. This requires the removal of the two 8mm bolts.
Remove the fluid tanks, this allows more room to get to the motor and pump assembly.
Remove the ½” headed bolt that holds the pump head to the motor.
Remove the pump head in question and inspect the coupling between the motor and pump head, check the set screws on the coupling to make sure they are tight.
The coupling on the pump side has to be accessed by spinning the shaft until the set screw can be accessed through the slot.
After both set screws have been tightened, reassemble the machine and re-test.
Refer to the video below.
1403 Series Leaking Fluid From Flow Correct Solenoid
Remove the Front panel of the machine, by removing the two 8mm screws.
Locate the flow correct block on the front left side of the machine, verify which solenoid is leaking.
Remove the new fluid tank to allow for more room.
Unplug the electrical connector on the solenoid that is leaking.
Remove the solenoid by using a wrench. There are two flat spots on the solenoid.
Note: if the solenoid comes apart in two pieces replace the solenoid. Part# E101-1038.
Replace the four O-rings on the solenoid with O-ring kit Part# E101-2337
Lubricate the new O-rings with ATF and reinstall the solenoid.
Note: refer to the following link for pictures. https://dashboard.bgprod.com/bg/news/techtips/preview/pxt2-1403-series-flow-correct-solenoid-o-ring-replacement
Scales Do Not Stay In Calibration
Check to make sure the scale plates are tight and not moving around.
Check to make sure the scale plates are not hitting anything, and make sure there is nothing under the scale plates to keep them from moving.
Make sure the hoses are not laying on or pulling on the fluid tanks.
Select the gear on the home screen of the machine.
Select the scale icon from the diagnostic menu.
Verify the tank sensor readings resemble the amount of fluid in the tanks and that they are stable.
Press down on the top of the tanks while watching the reading to verify they move in the correct direction.
Next calibrate the scales, verify they read -.06.
If the scale readings are fluctuating, or if any of the above tests fail, inspect all wiring between the scale sensor and the driveboard.
If the scales are still fluctuating or fail any of the above test, replace the scale sensor.
Manual Pressure Gauge On (1401/1402) Will Not Go To Zero
Install open ended hoses on both service lines to make sure there is no pressure in the system.
If gauge does not zero out follow the steps below.
Turn the lens of the gauge to the left, this will remove the lens.
Using plyers turn the silver screw located on the face of the gauge until it reads zero.
Reinstall the lens and see if it the gauge comes back to zero after use, if not replace the gauge assembly.