Curtis 1214-/15-/19-8 Manual 18
4 — MAINTENANCE
time the diagnostic history file 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 overtemperature may be caused by
operator habits or by overloading.
After a problem has been diagnosed and corrected, clearing the diagnostic history
file is advisable. This allows the controller to accumulate a new file of faults. By
checking the new diagnostic history file at a later date, you can readily determine
whether the problem was indeed completely fixed.
To clear the diagnostic history file, 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 Section 6 of this manual for more detail on program-
mer operation.
TESTING THE FAULT DETECTION CIRCUITRY
Specific material handling directives, such as prEN1175, require periodic testing
of the controller’s fault detection circuitry. It is recommended that each time the
vehicle is serviced, the M- fault detection circuitry be checked as follows:
1. Put the vehicle up on blocks to get the drive wheel(s) off the ground,
disconnect the battery, and make sure the keyswitch is off.
2. Using an inline fuse holder fitted with a 10-amp fuse and alligator
clips, connect the controller’s M- and B- terminals.
3. Turn the keyswitch on, release the brake, and apply the throttle. The
motor should not operate, and the direction contactors should not
pull in.
4. Leave the keyswitch on and remove the inline fuse wire. The vehicle
status should continue to remain off.
5. Cycle the keyswitch off and on, release the brake, and apply the
throttle. The vehicle should now operate normally.
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