Table of Contents
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Summarization of Contents
Fault Diagnosis Procedures
Group A Analog Sensors
Lists fault codes related to analog sensors, including piston pressure and boom angle.
Group B Inputs and Outputs
Details fault codes for digital and analog input/output and display unit malfunctions.
Group C Memory
Covers fault codes for Executive ROM, Duty ROM, Scratchpad RAM, and Personality ROM.
Group D General
Encompasses general faults such as 'No Duty Found', 'Current Duty Bad', and 'Configuration Uncalibrated'.
Power Supply Voltages
Input Power
Details the operating voltage range (11-36 VDC) and system shutdown conditions.
Internal Power Supplies
Explains monitoring of internal power generation from battery voltage at specific test points.
Accessing Main Computer Board and Termination Board
Checking Analog Drive Voltage
Procedure to measure the analog sensor drive voltage using a digital voltmeter.
Pressure Channel Fault Guide
Functional Tests
Detailed procedures for testing pressure transducers and verifying their operation.
Transducer Resistance Measurement
Instructions for measuring the resistance of piston and rod pressure transducers.
Analog Drive Voltage
Procedure to measure the analog drive voltage for sensors and diagnose related faults.
System Faults
No Duty Found Fault
System fault occurring when load chart information is unavailable, possibly due to sensor issues.
Executive ROM Fault
Indicates failure of IC2 on the main computer board; chip is replaceable.
Personality ROM Fault
Occurs until calibration is complete or if IC7 fails; may require re-calibration.
Scratchpad RAM Fault
Indicates failure of IC6 on the main computer board; requires computer replacement.
Duty ROM Fault
Associated with Duty Chip IC3 failure; chip contains load chart data and is replaceable.
Current Duty Bad Fault
Indicates failure of Duty Chip IC3; contains load chart data and is replaceable.
Configuration Uncalibrated Fault
Occurs when duty chip has more configurations than sold with the machine.
Digital and Analog I/O Faults
These faults are not user serviceable and require main computer board replacement.
Display Unit Fault
This unit is not user serviceable and requires replacement of the display unit.
Anti Two-Block System
System Will Not Show Two-Block
Troubleshooting steps for when the system fails to indicate a two-block condition.
System Shows Two-Block Incorrectly
Troubleshooting for when the system incorrectly indicates a two-block condition.
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