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ALARM DIAGNOSTICS (BYTE 531 T, 612 T)
"Function board" alarm summary table
Alarm
Meaning
AL_1: Function
Brush overload protection.
Brushes Ammeter
AL_2: Function
Suction motor overload protection.
Vacuum Ammeter
AL_3: Function
Power stage damaged.
Powerstage Fail
AL_4: Function
Overcurrent at brush or suction motor outputs.
Overcurrent
AL_5: Function
Thermal protection on brush/suction motor
Overtemperature
phase.
"Traction board" alarm summary table
Alarm
Meaning
AL_11: Traction
Forward gear active at ignition
Release Handle
AL_12: Traction
Reverse gear active at ignition
Release Handle
AL_13: Traction
Micro switches enabled
Pedal Failure
AL_15: Traction
Thermal protection on drive phase.
Overtemperature
AL_16: Traction
Drive power stage damaged
Powerstage Fail
AL_17: Traction
Overcurrent at drive output
Overcurrent
AL_18: Traction
Traction overload protection.
Tract. Ammeter
AL_24: Traction
Battery not connected to the function board
Batt connection
"General" alarm summary table
Alarm
Meaning
AL_20: General
Internal memory reading error
EEprom Fail
AL_21: General
Incorrect key sequence.
Key-off failure
AL_22: General
General relay damaged
Main relay fail
AL_23: General
Overvoltage.
Overvoltage
AL_25: General
Function-dashboard communication fail
Keyboard fail
Solution
Check the brush function mode. Brush motor excessive operation amperage de-
tected.
Check the suction motor absorption. Brush motor excessive operation amperage
detected.
Brush power stage or suction motor damaged: replace board.
Short-circuit detected at brush motor output or suction motor: check the con-
nections and the motor status.
Brush power stage and suction motor overheat (T° >80°C): check absorptions.
Solution
Release the micro switch; check the connections / components if it persists.
Release the micro switch; check the connections / components if it persists.
Check connections and micro switch status
Drive power stage and suction motor overheat (T° >80°C): check absorptions.
Drive power stage damaged: replace board. (always enabled)
Short-circuit detected at brush motor output: check the connections and the motor status.
Check the traction function usage mode. Traction motor excessive operation amperage de-
tected.
Check the traction function usage mode. Traction motor excessive operation am-
perage detected.
Solution
Replace board.
Bounce detected on the key signal: check connections and key contact status.
The board general relay looks damaged: replace board.
Overvoltage detected on function board.
Check battery connections.
Check keyboard and function board connections.
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