FORM NO. 56043126 - CR 1100, CR 1200 -
67
ELECTRICAL SYSTEM
CURTIS CONTROLLER (A3) DIAGNOSTICS
Diagnostics Method A:
Uses the machine’s control panel LED status display.
FUNCTION OF THE SPEED CONTROLLER STATUS LIGHT AND DISPLAY
Diagnostics Method B:
Uses the optional hand held programmer.
PROGRAMMER DIAGNOSTICS
With a programmer, diagnostics and troubleshooting is more direct than with the LED alone. The programmer presents complete diagnostic
information in plain language, no codes to decipher. Faults are displayed in the Diagnostic Menu, and the status of the controller inputs/outputs is
displayed in the Test Menu.
The following 4-step process is generally used for diagnosing and troubleshooting an inoperative vehicle: (1) visually inspect the vehicle for obvious
problems; (2) diagnose the problem, using the programmer; (3) test the circuitry with the programmer: and (4) correct the problem. Repeat the last
three steps as necessary until the vehicle is operational.
Example: A vehicle that does not operate in “forward” is brought in for repair.
1
Examine the vehicle and its wiring for any obvious problems, such as broken wires or loose connections.
2
Connect the programmer, put it in diagnostic mode, and read the displayed fault information. In this example, the display shows “No Faults
Present”, indicating that the controller has not detected anything out of the norm.
3
Put the programmer in test mode, and observe the status of inputs and outputs in the forward direction. In this example, the display shows
that the forward input did not activate when “forward” was selected, which means the problem is either in the electronic throttle or the throttle
wiring.
4
Check or replace the electronic throttle and wiring and repeat the test. If the programmer shows the forward switch closing and the vehicle now
drives normally, the problem has been corrected.
Refer to the Status Fault Codes
(Table 1)
for suggestions covering a wide range of possible faults.
DIAGNOSTIC HISTORY
The handheld programmer can be used to access the controller’s diagnostic history
fi
le. Connect the programmer, press the MORE INFO key, and
then while continuing to hold the MORE INFO key, press the DIAGNOSTICS key. The programmer will read out all the faults that the controller
has experienced since the last time the diagnostic history
fi
le was cleared. The faults may be intermittent faults, faults caused by loose wires, or
faults caused by operator errors. Faults such as contactor faults may be the result of loose wires; contactor wiring should be carefully checked out.
Faults such as HPD or over temperature may be caused by operator habits or by overloading.
After a problem has been diagnosed and corrected, clearing the diagnostic history
fi
le is advisable. This allows the controller to accumulate a new
fi
le of faults. By checking the new diagnostic history
fi
le at a later date, you can readily determine whether the problem was indeed completely
fi
xed.
To clear the diagnostic history
fi
le, go to the Special Program Menu (by pressing and holding the MORE INFO key, and then pressing the
PROGRAM key), scroll through the menu until “Clear Diagnostic History” is the top line in the display, and then press MORE INFO again. The
programmer will prompt you to acknowledge or cancel.
See Curtis Programmer Manual 56043101 for more detail on programmer operation.
The Curtis 1244 speed control will output a
fault code if there is a problem associated
with the speed control and wheel drive
system. See Figure 1. If a speed control
or drive motor fault occurs, the Wrench
Symbol
(E)
located in the top center on the
(A2) operator panel will
fl
ash a special error
code sequence until the fault is corrected.
See “
Table 1
” for a description of the fault
indications.
Service Note:
Instructions
on how to read the error code status light.
Example, OO O = two light
fl
ashes, a
short pause, one
fl
ash, a long pause and
the code will be repeated.
FIGURE 1
E
Summary of Contents for Cr 1100
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