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9.2. Alarm cause and remedy
AL01 Over voltage
Power supply voltage excess
Review the power voltage.
Use the proper power source.
Input power error (incorrect power).
Use voltmeter to check if the power
voltage is within rated voltage while
error still occurred.
Contact agent for proper service.
Lead of built-in regenerative brake
resistor or regenerative brake
option is disconnected.
Check the P,D terminals connected
well or not.
Check built-in regenerative brake
resistor or regenerative brake
option is disconnected well.
Built-in regenerative brake resistor
or regenerative brake option is
damaged.
Check if it is burn out or damaged.
Change the built-in resistor or
option.
Capacity of built-in regenerative
brake resistor or regenerative
brake option is insufficient.
Check if the capacity insufficient.
Add regenerative brake option or
increase capacity.
AL02 Low voltage
Input voltage of main circuit is lower
than permissible value.
Capacity of power supply is
insufficient.
Check if it occurred as motor torque
regenerated huge.
Increase power supply capacity.
Input power error (incorrect power).
AL03 Over current
Short occurred in drive output
phases U, V and W.
Check if the connection between
drive and motor is short.
Correct the wirings to prevent from
short-circuit or cable naked.
IGBT of servo drive faulty.
AL03 occurs if power is switched on
after U,V and W are disconnected.
Contact agent for proper service.
Improper parameters setting.
Check relevant parameters which
have modified.
Recover factory-set then re-define
user‟s demand.
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