Mitsubishi Electric FR E700

This fault stops the inverter output, triggered either by excessive electrical noise in the environment or an incorrect setting of the manufacturer's internal switch. Such conditions can lead to unreliable inverter operation or unexpected shutdowns. Identifying and addressing the source of noise or the switch position is crucial for stable performance.

This internal circuit fault stops the inverter output, indicating a generic problem within the inverter's internal electronics. Without more specific diagnostic information, it suggests a hardware malfunction that requires specialized attention. Continued operation with this fault is not possible.

This is a CPU fault that stops the inverter output when a communication fault occurs within the built-in CPU. Such an error indicates a critical internal processing issue, which can be influenced by external factors like electrical noise. Inverter operation is halted to prevent further damage or incorrect control.

This is a CPU fault that stops the inverter output when a communication fault occurs within the built-in CPU. Specific causes include excessive electrical noise or a short circuit between the PC and SD terminals. This critical internal error prevents safe operation.

This is a CPU fault that stops the inverter output when a communication fault occurs within the built-in CPU. Specific causes include excessive electrical noise or a short circuit between the PC and SD terminals. This critical internal error prevents safe operation.

This brake transistor alarm detects an issue caused by large regenerative energy from the motor, tripping the inverter. This fault signals potential overheating or overstress of the brake transistor circuit. Immediate power-off is critical to prevent component damage.

This fault indicates a critical communication error within the inverter's built-in CPU, leading to an immediate stop of the output. Potential causes include severe electrical noise in the operating environment or an unintended short circuit between the PC and SD control terminals. Resolving this is essential for any inverter operation.

This fault indicates an output side earth (ground) fault overcurrent detected during inverter startup on the load side. It signifies a critical insulation breakdown in the motor or its connecting cables, posing a significant safety hazard and risk of equipment damage. This protection is configurable via Pr. 249.

This fault stops the inverter output because the resistor of the inrush current limit circuit has overheated. Frequent power ON/OFF cycling is a common cause, stressing the components. Overheating can lead to component failure and damage to the inverter.

An output phase loss fault occurs if one of the three output phases (U, V, W) to the motor is lost during inverter operation (excluding specific conditions). This can cause motor damage due to imbalanced currents and will stop the inverter output. Protection is selected via Pr. 251.

This brake sequence fault stops the inverter output due to a sequence error occurring during the operation of the brake sequence function (configured by Pr. 278 to Pr. 283). This protective feature is not active in the initial inverter status. It indicates a timing or logical error in the controlled braking process.

This brake sequence fault stops the inverter output due to a sequence error occurring during the operation of the brake sequence function (configured by Pr. 278 to Pr. 283). This protective feature is not active in the initial inverter status. It indicates a timing or logical error in the controlled braking process.

This brake sequence fault stops the inverter output due to a sequence error occurring during the operation of the brake sequence function (configured by Pr. 278 to Pr. 283). This protective feature is not active in the initial inverter status. It indicates a timing or logical error in the controlled braking process.

This brake sequence fault stops the inverter output due to a sequence error occurring during the operation of the brake sequence function (configured by Pr. 278 to Pr. 283). This protective feature is not active in the initial inverter status. It indicates a timing or logical error in the controlled braking process.

This overcurrent trip occurs during acceleration when the inverter output current reaches or exceeds approximately 230% of its rated current. It indicates that the motor is experiencing excessive load, sudden acceleration demands, or a potential electrical fault. The inverter trips to protect itself and the motor.

This overcurrent trip occurs during constant speed operation when the inverter output current reaches or exceeds approximately 230% of its rated current. It often signals a sudden increase in load, an ongoing overload condition, or an electrical fault during steady-state operation. The inverter trips to prevent damage.

This stall prevention stop fault occurs if the inverter's output frequency drops to 1Hz and remains there for 3 seconds due to active stall prevention. It indicates a prolonged and severe overload condition on the motor, which can lead to motor and inverter stress if unaddressed.

This communication option fault stops the inverter output due to a communication line error during CC-Link operation. It can be caused by physical cable issues, incorrect lengths, or improper termination. This disruption prevents control and monitoring via the CC-Link network.

This fault appears when a communication option is connected, but the password lock (Pr. 296 = "0 or 100") is preventing its proper function. This issue specifically relates to the security settings for optional communication modules. Resolving it ensures the communication option can operate correctly.

An EEPROM fault, causing the inverter output to stop due to an error in the parameter storage (EEPROM fault) on the control circuit board. This often results from an excessive number of parameter write operations, potentially corrupting essential configuration data. Persistent issues may require expert intervention.

This internal board fault trips the inverter when there is an incorrect combination or mismatch between the control board and the main circuit board. This indicates a serious hardware incompatibility or assembly error. The inverter cannot operate safely under these conditions.

This fault indicates that the inverter could not resume operation properly within the programmed number of retries (set by Pr. 67). It signifies a persistent underlying problem that prevents automatic recovery, leading to the inverter tripping after multiple failed attempts. The root cause of the initial fault must be identified and corrected.

This safety circuit fault appears when the internal safety circuit malfunctions, or when protective lines (S1-PC, S2-PC) are open. It can also be triggered by a prolonged 24V external power supply start-up time. This is a critical safety integrity issue, preventing normal operation.

This USB communication fault stops the inverter output if communication is interrupted for a duration longer than specified by Pr. 548 (USB communication check time interval). It indicates a loss of data integrity or physical connection over the USB link. This prevents remote control or monitoring via USB.

This indication flickers when the inverter is being powered by the 24V external power supply, but the main circuit power is not supplied. It serves as an alarm, informing the technician that the main power source is absent or insufficient, although the inverter itself is not tripped. This can prevent unexpected startup when main power is restored.

This fan alarm appears on the operation panel when the cooling fan stops due to an alarm condition or operation inconsistent with the Pr. 244 (Cooling fan operation selection) setting. This alarm indicates a potential overheating risk, as adequate cooling is compromised, and the inverter will not trip immediately.