Keestar GA204-107, Instruction Manual

Page: 38 / 41

8. Alarm description, possible cause and corrective action
The PSDA driver has various protective functions. When one of the protections is
activated, the motor trips according to the timing chart, and the Servo Alarm Output (ALM)
is turned off.
Actions to be taken after trip events
• After a trip event, the LED touch panel displays an alarm code no., and no Servo-ON
occurs.
• Any trip status is cleared by keeping A-CLR (Alarm Clear Input) on for at least 120 ms
after A-CLR off.
•The overload protection can be cleared by A-CLR at least 10 seconds after the
occurrence of the event. If the control power connection between r and t is opened, the
time limiting operation is cleared.
• The alarms mentioned above can also be cleared with the LED touch panel.
Notes: Protections marked with * cannot be cleared with A-CLR (Alarm Clear Input).
They should be cleared by turning the power off, removing the causes, and then
turning the power on again
.
Code Protection
cause Corrective action
Err 01 Over current
The current flowing in the converter is larger
than the specified value.
1) The driver failed (due to defective circuits
or IGBT parts).
2) Motor wires (U, V and W) are shorted.
3) Motor wires (U, V and W) are grounded.
Motor burned
5) Poor connection of Motor wires
6) The relay for the dynamic brake is melted
and stuck due to the free quent
Servo-ON/OFF.
7) The motor is not compatible with the
driver.
1) Disconnect the motor wires, and enter
Servo-ON. If this trouble hap-pens
immediately, replace the driver with a
new one (that is working correctly).
2) Check if the U. V and W wires are
shorted at the connections. Reconnect
them, if necessary.
3) Measure the insulation resistance
between U/V/W and earth wire. If the
resistance is not correct, replace the
motor with a new one.
4) Measure the resistance between U, V
and W. If they are unbalanced, replace
the motor with a new one.
5) Check if the U/V/W connector pins are
firmly secured with screws. Loosened
pins should be fixed firmly.
6) Replace the driver with a new one. Do
not start or stop the motor by entering
Servo-ON or OFF.
7) Check the capacity of the motor and
driver on the nameplate. If the motor is
not compatible with the driver, replace it
with a correct one.
Err 02 Over voltage
The line voltage is larger than the specified Measure the terminal-to-terminal