87
Twin Disc, Incorporated
Troubleshooting
Power Transmission System Operator’s Manual #1020510
Display Faults
Note:
The following Fault Messages, Log Codes, and Status
Codes are arranged and listed in alphabetical order.
The TDEC-400 Display unit is a sealed non field serviceable device with two
cable connectors and a backlit dot matrix LCD screen.
Possible display faults include segments that don’t come on, stay on when they
should not, blank display, and no backlight.
One of the cable connectors is used to supply 24 volts DC and a signal from
the oil well fracturing rig light switch. The other connector attaches to the oil
well fracturing rig J1939 Data Bus. If the wiring that supplies the power is
damaged, there will not be any information displayed on the display screen.
If the connection to the oil well fracturing rig J1939 Data Bus is damaged or
missing, the display will show COM FAILURE.
Controller Test 1 is used to check the display pixels.
Controller Test 13 is used to adjust the blacklight brightness and contrast of the
display.
Note:
Refer to the System Control Drawing 1019142 in
Engineering Drawings for cable and pin locations that are
identified in the Troubleshooting instructions. Note that
pin connections are identified by cable number and pin
matrix number. For example, J2C2 refers to the cable at
Junction block 2, column C, row 2.
CONTROL ERROR Fault Message - Log Code I1 through I24
The control continuously tests its internal functions, and if a problem is detected,
a Log Code will be recorded and displayed that identifies the type of problem.
Oil well fracturing rig operation may continue for a limited time, depending on
the type of internal problem. The control must be replaced except for power
problems identified as I15 and I16.
Summary of Contents for TA-90-8501
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