Inverter : SJ200 Series : Protective Functions

Error Codes

Name	Cause(s)		Display on digital operator	Display on remote operator/copy unit
Over current	The inverter output was short-circuited, or the motor shaft is locked or has a heavy load. These conditions cause excessive current for the inverter, so the inverter output is turned OFF.	While at constant speed
		During deceleration
		During acceleration
		Others
Overload protection *1	When a motor overload is detected by the electronic thermal function, the inverter trips and turns OFF its output.
Braking resistor overload	When the regenerative braking resistor exceeds the usage time allowance or sage ratio, the inverter trips and turns OFF its output to the motor.
Over voltage protection	When the DC bus voltage exceeds a threshold, due to regenerative energy from the motor.
EEPROM error *2,3	When the built-in EEPROM memory has problems due to noise or excessive temperature, the inverter trips and turns OFF its output to the motor.
Under-voltage error	A decrease of internal DC bus voltage below a threshold results in a control circuit fault. This condition can also generate excessive motor heat or cause low torque. The inverter trips and turns OFF its output.
CPU error	A malfunction in the built-in CPU has occurred, so the inverter trips and turns OFF its output to the motor.
External trip	A signal on an intelligent input terminal configured as EXT has occurred. The inverter trips and turns OFF the output to the motor.
USP *4	When the Unattended Start Protection (USP) is enabled, an error occurred when power is applied while a Run signal is present. The inverter trips and does not go into Run Mode until the error is cleared.
Ground fault *5	The inverter is protected by the detection of ground faults between the inverter output and the motor during powerup tests. This feature protects the inverter, and does not protect humans.
Input over-voltage	When the input voltage is higher than the specified value, it is detected 100 seconds after powerup and the inverter trips and turns OFF its output.
Inverter thermal trip	When the inverter internal temperature is above the threshold, the thermal sensor in the inverter module detects the excessive temperature of the power devices and trips, turning the inverter output OFF.
Gate array error	An internal inverter error has occurred in communications between the CPU and gate array IC.
Thermistor	When a thermistor is connected to terminals [PTC] and [CM1] and the inverter has sensed the temperature is too high, the inverter trips and turns OFF the output.
Communications error	The inverter's watchdog timer for the communications network has timed out.

*1

Reset operations acceptable 10 seconds after the trip.

*2

If an EEPROM error (E08) occurs, be sure to confirm the parameter data values are still correct.

*3

EEPROM error may occer at power-on after shutting down the power while copying data with remote operator or initializing data. Shut down the power after completing copy or initialization.

*4

USP error occures at reseting trip after under-voltage error (E09) if USP is enabled. Reset once more to recover.

*5

Ground fault error (E14) cannot be released with resetting. Shut the power and check wiring.

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How to access the details about the present fault

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