Curtis 1205 Guide de dépannage télécharger pdf (Page 31)

Curtis 1204/1205 Manual, Rev. C

5 — TROUBLESHOOTING & BENCH TESTING

TROUBLESHOOTING

AND BENCH TESTING

Some behaviors that may seem to suggest controller malfunction do not, in

fact, indicate a problem but rather are typical of normal operation. Before

undertaking the diagnostic tests, check to see whether your problem is addressed

in the ﬁrst section, “Operational Notes.” The diagnostic tests are designed to

enable you to determine whether the trouble is in the controller or in some

other part of the motor control circuitry. The controllers themselves are

sealed and not ﬁeld serviceable; contact your local Curtis service center

if the problem is in the controller. The diagnostic section provides enough

detail to enable you to track circuitry problems to their source and repair them.

Finally, the bench tests will allow you to conﬁrm controller operation in a

simple, low-power test conﬁguration. Bench testing is primarily intended for

checking out a number of controllers on a regular basis.

OPERATIONAL NOTES

Noise

Controller operation is normally silent. An exception is that a 1 kHz tone

may be heard during plug braking. This noise is normal and indicates that

plugging is taking place. The noise will stop when plug braking stops.

Inability of Vehicle to Plug Brake to a Stop on a Steep Ramp

If the vehicle is rolling backwards down a steep ramp in reverse and the

throttle is applied demanding forward drive, the controller will attempt to

plug the vehicle to a stop. If the ramp is so steep that the plugging current

setpoint is insufﬁcient to stop the vehicle, it will continue to be braked

but will nevertheless roll down the ramp. If the mechanical brakes are

applied, and the vehicle is stopped, the full drive current will be available

when the throttle is applied and the vehicle will proceed up the ramp.

Sluggish Vehicle Behavior

Loss of power will be noticeable when the batteries become overly

discharged. This is a normal response to low battery voltage. Curtis

1204/1205 controllers are designed to protect against damage caused

by low batteries. On 24–36 volt controllers, for example, power to the

motor is cut back when the voltage goes below 16 volts. Refer to the

speciﬁcations (Appendix D) for other models.

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Curtis 1205 Guide de dépannage Page 31