Error, fault and alarm codes of products - what each code means, its causes and what to do - read from the manufacturers’ manuals, with the manual page each answer comes from.
AL-63 indicates a parameter checksum error. The manual's first action is: “Factory reset [Cn-21].”
Motor overrun error code AL-55 indicates motor overrunning. The manual's first action is: “Check for incorrect wiring in the drive output and encoder. Also, check the connection and load status of the equipment.”
AL-54 indicates excessive speed error in the drive system The manual's first action is: “Check for incorrect wiring in the drive output and encoder. Also, check the connection and load status of the equipment.”
Over pulse CMD error indicates a pulse command frequency issue. The manual's first action is: “Check the pulse command frequency on the upper level controller, and check the command pulse type.”
AL-51 indicates an excessive positional error. The manual's first action is: “Check the excessive position command pulse setting [P4-11], wiring, limit contact point, gain setting, encoder setting, and electric gear r…
AL-50 indicates an overspeed condition The manual's first action is: “Check the encoder, encoder settings, encoder wiring, gain settings, motor wiring, motor ID, electric gear ratio, and speed command scale.”
Control power fail indicates a failure in the control power supply. The manual's first action is: “Check the power unit wiring and power supply.”
AL-42 means main power failure has occurred. The manual's first action is: “Check the power unit wiring and power supply.”
AL-41 indicates an overvoltage condition The manual's first action is: “Check the input voltage and wiring. Check the braking resistance for damage. Check for excessive regenerative operation. Check the regenerative r…
AL-40 indicates low input voltage detected by the system. The manual's first action is: “Check input voltage and power unit wiring.”
Low Battery Error indicates insufficient voltage in the backup battery. The manual's first action is: “BackUp battery has not enough voltage, Change battery. ※After replacing battery, Power "ON" and Homing operation a…
Encoder Z PHASE Open error indicates the encoder cable is disconnected. The manual's first action is: “Check whether the encoder cable is disconnected.”
Motor setting error indicated by AL-33. The manual's first action is: “Check the [P0-00] setting.”
Encoder data error has occurred. The manual's first action is: “Check the [P0-02] setting and encoder wiring.”
All 33 error codes of the LS ELECTRIC L7SB Series (400V) LS ELECTRIC L7SB Series (400V) with their meaning, causes and what to do, taken from the manufacturer's manual with page references.