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while at constant speed
|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.
The dual-voltage motor is wired incorrectly.
during other conditions
|When a motor overload is detected by the electronic thermal function, the inverter trips and turns OFF its output.
|When the BRD operation rate exceeds the setting of "b090", this protective function shuts off the inverter output and displays the error code.
|When the DC bus voltage exceeds a threshold, due to regenerative energy from the motor.
|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.
|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.
|Current detection error
|If an error occurs in the internal current detection system, the inverter will shut off its output and display the error code.
|A malfunction in the built-in CPU has occurred, so the inverter trips and turns OFF its output to the motor.
|A signal on an intelligent input terminal configured as EXT has occurred. The inverter trips and turns OFF the output to the motor.
|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.
|The inverter is protected by the detection of ground faults between the inverter output and the motor upon during power up tests. This feature protects the inverter, and does not protect humans.
|The inverter tests for input over-voltage after the inverter has been in Stop Mode for 100 seconds. If an over-voltage condition exists, the inverter enters a fault state. After the fault is cleared, the inverter can enter Run Mode again.
|Inverter thermal detection system error
|When the thermal sensor in the inverter module
is not connected.
|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.
|CPU communication error
|When communication between two CPU fails, inverter trips and displays the error code.
|Main circuit error (*3)
|The inverter will trip if the power supply establishment is not recognized because of a malfunction due to noise or damage to the main circuit element.
|An internal inverter error has occurred at the safety protection circuit between the CPU and main driver unit. Excessive electrical noise may be the cause. The inverter has turned OFF the IGBT module output.
|When a thermistor is connected to terminals  and [L] and the inverter has sensed the temperature is too high, the inverter trips and turns OFF the output.
|When "01" has been specified for the Brake Control Enable (b120), the inverter will trip if it cannot receive the braking confirmation signal within the Brake Wait Time for Confirmation (b124) after the output of the brake release signal.
|Safe stop signal is given.
|If overload occurs during the motor operation at a very low speed, the inverter will detect the overload and shut off the inverter output.
|When the connection between inverter and operator keypad failed, inverter trips and displays the error code.
|Modbus communication error
|When “trip” is selected (C076=00) as a behavior in case of communication error, inverter trips when timeout happens.
|EzSQ invalid instruction
|The program stored in inverter memory has been destroyed, or the PRG terminal was turned on without a program downloaded to the inverter.
|EzSQ nesting count error
|Subroutines, if-statement, or for-next loop are nested in more than eight layers
|EzSQ instruction error
|Inverter found the command which cannot be executed.
|EzSQ user trip (0 to 9)
|When user –defined trip happens, inverter trips and displays the error code.
|The inverter detects errors in the option board mounted in the optional slot. For details, refer to the instruction manual for the mounted option board.
|If the encoder wiring is disconnected, an encoder connection error is detected, the encoder fails, or an encoder that does not support line driver output is used, the inverter will shut off its output and display the error code shown on the right.
|If the motor speed rises to "maximum frequency
(A004) x over-speed error detection level (P026)" or more, the inverter will shut off its output and display the error code shown on the right.
|Positioning range error
|If current position exceeds the position range (P072-P073), the inverter will shut off its output and display the error code.