Vestil EPT-30 User Manual

Page 43

Curtis PMC 1207/1207A Manual

4 — MAINTENANCE

continuing to hold the

INFO

key—press the

DIAGNOSTICS

key. The program-

mer will read out all the faults that the controller has experienced since the last
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

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

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.