Mitsubishi Electric FR-E500 Inverter

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.

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.

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.

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.

This error code indicates a communication fault originating from the PU connector, specifically related to RS-485 communication. When the E.PUE fault occurs, the inverter's operation stops, and communication via the PU connector is interrupted. During this fault state, the inverter cannot be reset using a computer connected via the PU connector.

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 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 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'.

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.

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.

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 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.

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.