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Normal and Fault Condition LED Messages
106 AX2550 Motor Controller User’s Manual Version 1.9b. June 1, 2007
Temporary Faults
Temporary Faults are condition that cause the controller’s Power Output stage to turn Off
and remain off for as long as the fault is present. Temporary Faults are indicated with the
LED displaying a solid “8”. Conditions that cause temporary faults are:
• Overvoltage
• Undervoltage
• Overtemperature condition (see page 38)
• Dead-man activation (see page 52)
Permanent Faults
Permanent Faults are irrecoverable error condition. When such a condition is detected, the
controller’s Power Output stage is turned Off for safety reasons and remains Off until it is
reset of powered down and up.
Permanent Faults are indicated with a rapidly flashing “8”. Condition causing a permanent
fault are:
• Encoder Error
• Short Circuit detection
• Emergency Stop activation
Emergency stop condition can be triggered by pressing the Prog and Set button simulta-
neously, or by activating the Estop/Inv input if enabled.
Self-Test Display
Self test is a special condition that is entered by holding the Program and Set button imme-
diately after power-on or reset. During self test, the LEDs will display the controller’s soft-
ware revision number by flashing a sequence of digits as shown in the figure below. Then
each motor will, in turn, be ramped to maximum forward and maximum reverse. When the
motors are operating, the LED will display one of the patterns described in Table 18. The
cycle will repeat indefinitely until the controller is powered Off or reset.
FIGURE 66. No Radio signal scrolling message