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System Alarm Codes
Alarm Code 8 or 9 ( Piston Pressure Sensor)
This code is caused by the output voltage of the piston pressure sensor is lower (code 8) than
the minimum or higher (code 9) than the maximum voltage.
Actions to take;
Fully retract the boom and lower the angle to zero degrees
. Piston
pressure sensor is located on the top side of the lift cylinder. See figure 7.
1.
Using your finger lift the lock tab on the sensor connector and switch the connector and
see if the code changes to the opposite sensor, if it does check the wiring from the
display to the sensor and check that air is not creating the code by bleeding the sensor
or hydraulic fluid is in the connector.
2.
Check the supply voltage and ground at the connector end. See figure 7. If the code
does not change and wiring is ok bleed pressure sensor or replace it.
3.
Supply voltage for pressure sensors is 15vdc, Output with no load should be around .70
to .90vdc
4.
Call for service if code is still present.
Fig 7
PIN 3 Wires
1 +15vdc
2 output signal 0,5 .. 5,5 V
3 GND
3B6
Troubleshooting Manual
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