Mitsubishi Electric FR-A800

This signal is output when an output short-circuit is detected, specifically when an E.GF (Output side earth (ground) fault overcurrent) occurs while Pr.249 is set to '2'. This indicates a severe fault on the output side that has triggered a restricted reset condition for earth faults.

A fault has occurred in the brake transistor circuit, leading to the inverter output stopping. This typically happens when the regenerative energy from the motor is excessively large, exceeding the capacity of the brake transistor or optional brake resistor. This protective function is only active when an optional brake resistor is connected.

This warning appears when the inverter continues to operate despite an error detected in the communication line or communication option, specifically when Pr.502 is set to '6'. It indicates an ongoing communication problem that, while not immediately stopping the inverter, requires attention.

A fault has occurred in the inverter's parameter storage device, such as an E2PROM fault. This indicates an issue with the non-volatile memory that stores inverter parameters, potentially leading to lost or corrupted settings.

The inverter's built-in CPU failed to complete an arithmetic operation within a predetermined timeframe, triggering an internal alarm and stopping the output. This indicates a critical internal processing error within the inverter.

This warning appears when the inverter detects that its assigned IP address is already in use by another device on the network. This conflict prevents proper network communication and can cause system instability.

This fault indicates a general issue with an installed option card or module in the FR-A800 inverter. This could be a communication card, I/O expansion card, or feedback card.

This fault indicates a general issue with an installed option card or module in the FR-A800 inverter. This could be a communication card, I/O expansion card, or feedback card.

This fault indicates a general issue with an installed option card or module in the FR-A800 inverter. This could be a communication card, I/O expansion card, or feedback card.

This fault indicates a malfunction of the FR-A800's central processing unit (CPU). A CPU fault can cause the inverter to stop functioning entirely or behave erratically, preventing normal operation and control.

This fault indicates a malfunction of the FR-A800's central processing unit (CPU). A CPU fault can cause the inverter to stop functioning entirely or behave erratically, preventing normal operation and control.

This fault indicates a general internal circuit malfunction within the FR-A800 inverter. This is a broad category that suggests a hardware or firmware issue not covered by more specific fault codes.

This function stops the inverter output if an open phase condition is detected in one of the three output phases (U, V, W) on the load side. An open phase can lead to motor overheating, vibration, and damage, or unstable operation.

The inverter output is shut off due to a contact failure between the inverter and a plug-in option, or if a manufacturer setting switch on the plug-in option has been altered. Excessive electrical noise around the inverter can also contribute to this fault. This compromises the functionality of the plug-in option.

These codes (E.5, E.6, E.7) indicate general internal circuit faults within the FR-A800/A800 Plus Series drive. They typically point to unexpected conditions within the drive's control logic or hardware that do not fall under more specific fault categories.

The inverter has detected an output current fault, specifically an earth (ground) fault, on its output side (affecting the motor or connection cable). This indicates a breakdown in insulation, leading to current leakage to ground. An earth fault is a significant safety hazard and can cause severe damage to the motor or inverter if unresolved.

This fault indicates an issue during the process of decelerating the motor to a stop or reversing its direction, where the FR-A800 detects unexpected rotation or an inability to control the deceleration as commanded.

This fault indicates a general malfunction within the inverter's internal circuitry. The specific cause is not detailed in the manual, suggesting a fundamental hardware problem that cannot be resolved through basic troubleshooting. Continued attempts to operate with this fault may lead to further damage.

The inverter output is shut off because a user-defined protective function, configured via the PLC function, has been activated. This occurs when a value between "16" and "20" is written to the special register SD1214 while the PLC function is enabled (Pr.414 is not "0"). It signifies a condition that the user's PLC program has flagged as a fault.

The inverter output is shut off if an incorrect signal type or magnitude (e.g., 30mA+ current or 7.5V+ voltage) was detected on terminal 2 or 4, contrary to the parameter settings for current input. This indicates a mismatch between the physical input signal and the configured analog input type.

The inverter output is shut off due to a fault in the brake circuit, typically indicating damage to the brake transistor. This is a critical internal hardware fault requiring immediate attention to prevent further damage.

This fault occurs when the detected output current exceeds a pre-defined level set by parameter M460 (Pr.150), and the detection operation is enabled by M464 (Pr.167). It indicates an excessive current condition, potentially due to an overload or short circuit at startup, causing the FR-A800 inverter to trip.

This fault indicates that the installed circuit board is either incompatible with the specific inverter model or is not correctly seated/connected within the inverter. The inverter will cease operation to prevent potential damage. An incorrect or improperly connected board can lead to system malfunction or inability to perform intended functions.

The inverter output is shut off due to a communication fault within the built-in CPU, potentially indicated by specific sub-faults (E.5, E.6, E.7 on FR-LU08). This can be triggered by excessive electrical noise in the environment or an improper connection of an Ethernet communication cable. An internal CPU fault can render the inverter inoperable.

This fault indicates a short circuit in the power supply circuit for the operation panel (FR-DU08) or parameter unit (FR-PU07) connected to the PU connector of the FR-A800/A800 Plus Series drive. This prevents proper operation panel functionality.

This fault indicates that a critical input signal required for the FR-A800/A800 Plus Series drive's operation has been lost or is not present. This can relate to control signals or feedback, leading to the drive's protective shutoff.

This fault indicates that an external protective device or system has detected an anomaly and triggered an input to the FR-A800 inverter, causing it to trip while it was providing output to the motor.

This fault indicates an error in the Ethernet communication between the FR-A800 inverter and an external control system or device. This will prevent remote control, monitoring, and data exchange over Ethernet.

This fault indicates an issue with the phase sequence or signal integrity of the encoder feedback connected to the FR-A800/A800 Plus Series drive. It signifies that the drive cannot properly interpret the motor's position or speed from the encoder, often due to incorrect wiring or a damaged encoder.

This fault indicates that the inverter's internal heat sink has exceeded its safe operating temperature, triggering a temperature sensor and shutting down the inverter output. This usually happens when the ambient temperature is too high, the heat sink is blocked by debris, or the cooling fan is not functioning correctly. Sustained overheating shortens the lifespan of inverter components and can lead to permanent damage.

This protective function detects an earth (ground) fault on the inverter's output side. If Pr.249 is set to '1' or '2' and an earth (ground) fault is detected at start, the output is shut off. If Pr.249 is set to '2', the reset method is restricted, preventing damage from repeated reset operations by methods other than turning off the control circuit power.

This fault occurs when Pr.872 (Input phase loss protection selection) is enabled ('1') and one of the three phases of the input power supply to a three-phase model inverter is lost. The inverter immediately shuts off its output to prevent damage. This condition indicates a break, loose connection, or failure in one of the incoming power lines. Continued operation with a phase loss can lead to severe damage to the inverter's input rectifier bridge.

The inverter output is shut off when the resistor in the inrush current limit circuit has overheated, indicating a fault within this circuit. This typically results from frequent power ON/OFF cycles or a damaged component within the inrush current path. Continued operation with this fault risks further component damage.

This fault indicates that the FR-A800 inverter detected an instantaneous loss or significant sag of the incoming AC power supply voltage. The inverter has tripped to protect itself and the motor from unstable operation.

This fault specifically indicates an issue with a 4-20mA analog current input signal. The fault typically triggers if the input current drops below 4mA (e.g., 0mA), indicating a broken wire or sensor failure.

The inverter output is shut off when the load on the motor falls below the defined lower limit fault detection range. This protective function detects abnormally light load conditions, potentially indicating a mechanical issue or a disconnected load, and is active only when Pr.1491 is not '9999'.

The inverter output is shut off if one of the three phases (U, V, W) on the output side (motor/load side) is lost. This typically indicates a broken wire, loose connection, or open circuit in the motor wiring, leading to unbalanced currents and potential motor overheating.

The inverter output is shut off when the load on the motor exceeds the defined upper limit fault detection range. This is a protective function to prevent damage from excessive loading, active only when Pr.1490 is not set to '9999'.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

These faults indicate an issue within the brake control sequence of the FR-A800/A800 Plus Series drive. This could relate to the operation of an external mechanical brake, its feedback, or the drive's internal brake control logic, preventing safe and controlled stopping.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

This fault indicates an error in the FR-A800's brake sequence control. This typically involves the timing and operation of an external mechanical brake, which is critical for holding the load and safe operation.

This fault occurs in PM (Permanent Magnet) motor control modes with the FR-A800/A800 Plus Series drive, indicating that the drive is unable to determine the initial magnetic pole position of the motor. This is crucial for starting and controlling PM motors effectively.

When the inverter's output current rapidly increases to approximately 230% of the rated current during the acceleration phase, the internal protection circuit is triggered, leading to an immediate shutdown of the inverter output. This can indicate excessive load, improper acceleration settings, or an output short-circuit condition. Left unaddressed, this can cause repeated trips, motor damage, or inverter component stress.

This fault occurs when the inverter's output current reaches or exceeds approximately 230% of the rated current while operating at a constant speed. This activates the protection circuit, causing the inverter output to shut down. Common causes include sudden load changes, output short-circuits, or incorrect control parameters. Repeated overcurrent can lead to motor and inverter damage.

The inverter output current has exceeded approximately 230% of its rated value during deceleration, causing the protection circuit to activate and shut off the inverter. This can be caused by sudden speed reductions, an output short-circuit, or issues with the mechanical brake. Unresolved, it can lead to component stress and potential damage.

This fault occurs when the actual position deviation in the FR-A800/A800 Plus Series drive exceeds the permitted threshold, typically in applications requiring precise position control with a feedback device. This indicates a failure to maintain the commanded position.

This fault occurs when the external thermal relay connected to the CS-SD terminals has tripped, indicating an overload condition detected by an external device. The FR-A800 inverter output is shut off to protect the motor and system. This fault is triggered when parameter T708 (Pr.186) (CS terminal function selection) is set to '7' (external thermal relay input) and the CS-SD terminal circuit becomes open.

The inverter output is shut off if stall prevention operation causes the output frequency to drop to 0.5 Hz for 3 seconds, or if torque limit operation causes frequency to drop to Pr.865 and output torque exceeds Pr.874 for 3 seconds in speed control. This protective fault indicates severe motor overload or an issue with stall prevention settings.

The inverter output is shut off due to a communication line error in the installed communication option. This can stem from incorrect option settings, a loose plug-in option card, or a damaged communication cable, including improper termination. Loss of communication functionality can disrupt system control.

These faults indicate an issue with one of the communication option cards installed in the FR-A800/A800 Plus Series drive (E.OP1 for connector 1, E.OP2 for connector 2, E.OP3 for connector 3). The drive detects a problem with the option, leading to a protective shutoff.

This fault appears under several conditions: if a plug-in option for torque command is selected (Pr.804) but no option is mounted, if a manufacturer setting switch on a plug-in option is changed, or if a communication option is connected while Pr.296 (Password lock level) is set to '0' or '100'. It indicates an incorrect configuration or an issue with an installed option.

This fault indicates that the motor speed has exceeded the programmed overspeed detection level in the FR-A800/A800 Plus Series drive. This protective function prevents uncontrolled acceleration or runaway conditions of the motor.

The inverter output is shut off because the motor speed significantly deviated from the command value during Vector or PM sensorless vector control, preventing proper control. This usually occurs when Pr.285 Speed deviation excess detection frequency is active and can be caused by sudden load changes or incorrect parameter settings. Prolonged deviation can lead to unstable operation.

Regenerative power or a power supply surge has caused the inverter's internal main circuit DC voltage to rise above the specified limit, triggering the protective shutdown. This can occur with rapid acceleration, especially with vertical loads, or if stall prevention settings are incorrect. Continued overvoltage can damage inverter components.

This fault occurs when the DC bus voltage in the FR-A800 inverter exceeds a permissible limit during deceleration, due to regenerative energy from the motor returning to the DC bus. This typically happens when the deceleration time is too short or the braking capacity (resistor or other means) is insufficient to dissipate the regenerative energy.

This fault indicates a problem with the internal 24 VDC power supply of the FR-A800/A800 Plus Series drive or an issue with an external 24 VDC power supply connected to terminal +24, which powers the control circuit. This can impact the drive's control functions.

This fault indicates a general internal circuit malfunction within the FR-A800 inverter. This is a broad category that suggests a hardware or firmware issue not covered by more specific fault codes.

This fault occurs during the pre-charge phase of the FR-A800 inverter, which is the initial charging of the DC bus capacitors through resistors to limit inrush current. A fault here indicates an issue with this circuit.

A fault has occurred in the inverter's parameter storage (EEPROM failure) on the control circuit board, causing the inverter output to shut off. This often results from an excessively high number of write operations to the EEPROM, leading to degradation. This fault indicates a potential hardware degradation that can affect parameter retention.

A critical fault has occurred in the inverter's main circuit board, specifically related to the storage of inverter model information. This indicates an internal memory corruption or hardware failure which prevents the inverter from identifying itself or its configuration. This is a severe internal fault requiring factory attention.

This protective function activates if data corruption occurs in the FR-A800 inverter's internal storage device or if data writing fails, typically due to power-OFF during parameter operations. The fault can prevent normal operation and requires specific corrective actions depending on the faulty area indicated by Pr.890.

The inverter output is shut off if, during PID control, the measured feedback value goes outside the limits set by Pr.131 (PID upper limit) or Pr.132 (PID lower limit), or if the absolute deviation from the setpoint exceeds Pr.553 (PID deviation limit). This protective function is not active by default and must be enabled via Pr.554. An erroneous PID signal can lead to unstable process control or unexpected shutdowns, indicating a sensor issue or incorrect parameter tuning.

The inverter output is shut off because communication between the inverter and the Parameter Unit (PU) has been suspended, or RS-485 communication errors exceeded the retry count or check time. This occurs when Pr.75 has PU disconnection detection enabled, or if Pr.121 or Pr.122 settings for RS-485 communication are exceeded. It indicates a loss of control or monitoring via the PU/RS-485 link.

This fault indicates that the FR-A800/A800 Plus Series drive has attempted to clear a previous fault and restart operation multiple times, as configured by auto-restart parameters, but has failed to do so within the allowed retry count. This points to a persistent underlying issue.

The inverter output has been shut off due to a detected fault in the safety circuit or a functional safety-related issue. This can be caused by a broken wire in the safety input terminals (S1, S2, PC) when using safety functions, or general functional safety failures in Safety Communication models. This critical fault ensures machinery cannot operate unsafely.

The inverter output is shut off when the motor loses synchronization during operation, a condition specifically monitored under PM sensorless vector control. This fault indicates a loss of control over the motor's rotor position, leading to erratic operation.

The FR-A800 inverter's internal electronic thermal overload relay has tripped, indicating that the motor has been subjected to a continuous overload condition exceeding its thermal capacity for an extended period. This protects the motor from overheating and damage.

This fault indicates an error in the USB communication with the FR-A800 inverter. This typically affects connectivity with tools like FR Configurator2 for parameter setup and monitoring.

This fault indicates that the DC bus voltage within the FR-A800 inverter has dropped below a specified minimum threshold. This typically occurs due to low incoming AC supply voltage or during an instantaneous power failure event. The inverter trips to prevent damage from insufficient operating voltage.

This fault appears when Ethernet communication is interrupted by physical factors, especially when Pr.1431 (Ethernet signal loss detection function selection) is set to a value between '1' and '3'. It signifies a physical layer problem with the Ethernet connection to the inverter.

This error occurs if a parameter setting was attempted while Pr.77 (Parameter write selection) disables write operations, if frequency jump ranges (Pr.31 to Pr.36) overlap, or if communication between the PU (Parameter Unit) and the inverter is abnormal. It indicates an issue preventing parameter modification or a communication problem.

This error signifies that a parameter write was attempted while Pr.77 (Parameter write selection) was set to '0', which explicitly disables parameter write operations during inverter run-time. It prevents accidental or unauthorized parameter changes while the system is active.

This error indicates that the analog input bias and gain calibration values (specifically C3, C4, C6, and C7) have been set too close to each other. This can lead to inaccurate analog signal processing and incorrect inverter behavior.

This error occurs if parameter setting was attempted in External or NET operation mode while Pr.77 (Parameter write selection) is '1', or if parameter write was attempted when the command source is not the operation panel. It indicates a conflict between the current operating mode or command source and the attempt to write parameters.

This is a general error indication displayed by the FR-A800 inverter, signifying that a fault condition has occurred. The specific cause requires further diagnosis, typically by checking the fault history or other indicators on the operation panel, as this code is a placeholder for a more specific issue.

This indication appears when the inverter's internal cooling fan stops operating due to a fault or operates in a manner inconsistent with the setting of Pr. 244 'cooling fan operation selection'. A faulty cooling fan can lead to inverter overheating and subsequent shutdowns.

This warning indicates that the FR-A800 inverter's cooling fan speed has dropped to 50% or less of its nominal speed, or one or more fans are failing in systems with multiple fans. This signifies that the inverter's cooling capacity is reduced, which can lead to overheating and premature failure of internal components if not addressed. E700 (Pr.255) bit 2 is turned ON when this warning occurs.

This function stops the inverter output if a ground fault overcurrent (alarm output E.GF) is detected on the inverter's output (load) side, affecting the motor or its connection cable. This protection can be enabled or disabled at inverter startup using Pr. 249. If enabled (Pr. 249=1), there will be an approximate 20ms output delay at every start.

This fault indicates that the inverter's cooling fin has overheated, activating an internal overheat sensor and stopping the inverter output. This condition signifies either insufficient cooling, high ambient temperatures, or a blocked cooling path, posing a risk of damage to the inverter's power components.

The operation panel is in a locked state, disabling all operations except pressing the STOP/RESET key. This feature is typically used to prevent unintended changes to inverter operation parameters or commands.

This warning appears when the configured IP address or subnet mask for the inverter falls outside the specified valid range. This indicates an invalid network configuration that will prevent the inverter from communicating correctly on the network.

This warning appears when the current load on the inverter deviates from the detection width defined by Pr.1488 (Upper limit warning detection width) or Pr.1489 (Lower limit warning detection width). It indicates an unexpected load condition, either too heavy or too light, potentially due to equipment issues.

The password function is active, restricting the display and setting of parameters. This security feature prevents unauthorized access and modification of the inverter's configuration.

This indicator appears when the inverter's cumulative energization time reaches or exceeds the value set in parameter Pr.504. It serves as a reminder that routine maintenance may be due for the equipment.

The FR-A800 inverter has detected an instantaneous overcurrent condition in the output stage, exceeding its current limit. This can occur during acceleration, deceleration, or constant speed operation, and is a protective trip to prevent damage to the inverter's power devices (IGBTs) and the motor.

The inverter output is shut off because the output current reached or exceeded approximately 200% of the rated current during the acceleration phase. This indicates that the motor load is too high for the acceleration rate, or there is an issue with the motor or wiring.

The inverter output is shut off because the output current reached or exceeded approximately 200% of the rated current during the deceleration phase. This can be caused by too rapid deceleration, issues with mechanical braking, or a fault in the motor/wiring.

This fault indicates that an external thermal relay, typically used for motor overheat protection, or an internally mounted temperature relay in the motor, has operated (contacts opened), causing the inverter output to stop. The inverter requires a reset to restart after this fault. This function is active only when '7' (OH signal) is assigned to Pr. 183 'MRS terminal (MRS) function selection'.

This alarm indicates that the FR-A800 inverter's stall prevention function has activated due to an overcurrent condition, typically during acceleration, constant speed, or deceleration. The inverter attempts to prevent a trip by limiting the output current, which may result in reduced speed or torque. It is often a precursor to an OC trip if the condition persists.

The inverter output is stopped due to an internal connector fault within an optional device connected to the inverter. This indicates a communication or connection issue with an installed option card or module.

The inverter output is shut off due to regenerative overvoltage, meaning the internal main circuit DC voltage reached or exceeded a specified threshold during acceleration. This can occur if acceleration is too slow for the application, or due to external surge voltages on the power supply.

This indication means the motor has been stopped either by pressing the STOP/RESET key (when enabled in modes other than PU operation via Pr.75) or by the emergency stop function. It signifies a deliberate or emergency shutdown of the motor's operation.

This fault stops the inverter output if communication between the inverter and the Parameter Unit (PU) is suspended due to disconnection or errors. This occurs when specific settings (e.g., '2', '3', '16', or '17') are configured in Pr. 75, or if the number of successive communication errors exceeds the permissible retries when Pr. 121 is set to '9999' for RS-485 communication.

This pre-alarm appears if the regenerative brake duty reaches or exceeds 85% of the value set in Pr.70 (Special regenerative brake duty). It's a warning that the regenerative braking capacity is nearing its limit, and a regenerative overvoltage (E.OV[]) fault may occur if it reaches 100%.

This function stops the inverter output because operation could not be resumed properly within the configured number of retries. This fault indicates that a preceding error condition repeatedly occurred, and the inverter's auto-retry attempts were unsuccessful.

This warning is displayed when a condition is detected in the internal safety circuit of the FR-A800/A800 Plus Series drive. It often indicates that the safety inputs (S1, S2) are not in the expected ON state for operation, or there's an internal fault, which leads to output shutoff (Safe state).

This indicator appears if the speed limit level is exceeded during torque control. It signifies that the inverter is actively limiting the motor speed to the set maximum, preventing it from overrunning.

The inverter output is shut off because the output current reached or exceeded approximately 200% of the rated current while operating at a constant speed. This suggests a sudden increase in load or a fault in the motor/wiring during stable operation.

The running frequency has fallen to 0 due to the activation of the stall prevention function (Overload during stall prevention). This occurs when the motor is under an overload condition, causing the inverter to reduce frequency to prevent tripping.

This pre-alarm appears if the cumulative value of the electronic thermal O/L relay reaches or exceeds 85% of the preset level in Pr.9 (Electronic thermal O/L relay). It serves as a warning that the motor is approaching its thermal limit, and a protective shutdown will activate if 100% is reached.