Ditch Witch JT20 - Manual (Page 146)

JT20 Operator’s Manual
Systems and Equipment - 145
Diagnostic Codes
CMW
®
Reading Machine Diagnostic Codes
Use the red diagnostic light to learn the condition of the diagnostic system. Under normal operating
conditions, the diagnostic light will light steadily for two seconds after ignition is turned on to indicate light is
working. It will then go out and remain out unless a diagnostic code is recorded.
If diagnostic codes are detected, the diagnostic light will either flash on and off for 10 seconds to indicate a
non-essential code or remain on for 3 seconds and off for half a second to indicate an essential code.
Code Severity Levels
Diagnostic codes are given one of two levels of severity.
• A non-essential code affects non-essential functions of the unit. If the system detects a non-essential
problem, a diagnostic code will be recorded and the diagnostic light will flash for 10 seconds and then
go out. Each time ignition is turned on, full operation will be available until the diagnostic system
detects a problem.
• An essential code affects rotation, thrust, drilling fluid, or ground drive. If the system detects an
essential problem, a diagnostic code will be recorded and the diagnostic light will cycle on for three
seconds and off for 1/2 second. Some machine functions may not work until the problem is corrected.
Each time ignition is turned on, full operation will be available until the diagnostic system detects a
problem.
Review Modes
IMPORTANT: Do not turn off ignition. Diagnostic codes are cleared each time ignition is turned off.
View All Codes View Codes Individually
1. Ensure that engine is running and no one is
sitting in operator’s seat.
2. Press and hold the resume button for two
seconds.
3. Diagnostic light will flash code 12 three times
to indicate review mode is operational.
4. After flashing code 12, all diagnostic codes
detected since the last time the ignition was
turned on are flashed three times each.
5. To save diagnostic codes, continue normal
operation. Do not turn ignition off.
6. Once the problem has been corrected, clear
all codes by turning ignition off.
1. Ensure that engine is running and no one is
sitting in operator’s seat.
2. Press and hold the set button for two
seconds.
3. Diagnostic light will flash code 12 (flash,
pause, flash, flash, longer pause) to indicate
review mode is operational.
4. After code 12 is flashed, press set button to
see first code.
• Press resume to see same code again or
press set to see next code.
• Continue pressing set until all diagnostic
codes detected since the last time the
ignition was turned on are flashed.
5. To save diagnostic codes, continue normal
operation. Do not turn ignition off.
6. Once the problem has been corrected, clear
all codes by turning ignition off.