Hitachi X200 Fault Codes & Troubleshooting List 2026

Hitachi X200 Fault Codes & Troubleshooting List 2026 – Troubleshoot your Hitachi X200 inverter with our updated 2026 guide. Learn to interpret E01-E60 trips, access the trip history via the d081 parameter, and reset faults to minimize downtime.

The Hitachi X200 is a high-performance micro-drive known for its compact design and efficient sensorless vector control. Frequently used in 2026 for conveyors, packaging machines, and pump systems, it utilizes a 4-digit LED display to communicate status. When a protection circuit is triggered, the drive flashes a trip code starting with “E” (e.g., E01, E07, E09).

This guide provides the most updated resources for 2026 to help you diagnose these error codes and get your compact industrial systems back online quickly.

X200 Fault Codes Reference Table

Below is the complete list of protective functions and trip codes. Match the code appearing on your LED operator with the diagnostic table below to identify the root cause of the shutdown.

Fault Code and Meaning	Cause and Remedy
E 01 Over-current event while at constant speed	Cause: The inverter output was short-circuited, or the motor shaft is locked or has a heavy load. The dual-voltage motor is wired incorrectly. Remedy: Check for short circuits at the inverter output. Check if the motor shaft is physically locked. Reduce the load on the motor. Verify dual-voltage motor wiring. Press Stop/Reset key to clear.
E 02 Over-current event during deceleration	Cause: Excessive current detected during deceleration. Inverter output short-circuited, motor locked, or heavy load. Remedy: Check for short circuits or ground faults. Increase deceleration time. Check for mechanical lock-up. Press Stop/Reset key to clear.
E 03 Over-current event during acceleration	Cause: Excessive current detected during acceleration. Inverter output short-circuited, motor locked, or heavy load. Remedy: Check for short circuits. Increase acceleration time. Check if motor load is too heavy for the inverter rating. Press Stop/Reset key to clear.
E 04 Over-current event during other conditions	Cause: Excessive current detected during conditions other than constant speed, accel, or decel. Remedy: Check motor wiring and insulation. Inspect for intermittent mechanical binding. Press Stop/Reset key to clear.
E 05 Overload protection	Cause: Motor overload detected by the electronic thermal function. The inverter trips to protect the motor. Remedy: Reduce the motor load. Check if the electronic thermal setting matches the motor. Allow motor to cool before restarting.
E 07 Over-voltage protection	Cause: The DC bus voltage exceeds a threshold, often due to regenerative energy from the motor (acting as a generator). Remedy: Increase deceleration time. Install a braking resistor if deceleration is too fast. Check input voltage stability.
E 08 EEPROM error	Cause: Built-in EEPROM memory has problems due to electrical noise or excessive temperature. Remedy: Check ambient temperature and cooling. Check for sources of electrical noise (grounding). Important: Confirm parameter data values are still correct. If power was turned OFF while [RS] Reset input was ON, this error occurs on restore.
E 09 Under-voltage error	Cause: Decrease of internal DC bus voltage below threshold (Control circuit fault). Can generate excessive motor heat or low torque. Remedy: Check input power supply voltage. Check for loose power connections. Press Stop/Reset key to clear.
E 11 CPU error	Cause: A malfunction in the built-in CPU has occurred. Remedy: Cycle power to the inverter. Check for excessive electrical noise interference. If the error persists, the unit may require service.
E 12 External trip	Cause: A signal on an intelligent input terminal configured as EXT (External Trip) has occurred. Remedy: Investigate the external device connected to the EXT terminal. Remove the external error condition. Press Stop/Reset key to clear.
E 13 USP (Unattended Start Protection)	Cause: Power was applied while a Run signal was already present (and USP is enabled). Remedy: Turn off the Run signal (switch or command). Press Stop/Reset key to clear the error. Re-apply Run signal to start.
E 14 Ground fault	Cause: Ground fault detected between the inverter output and the motor during powerup tests. Remedy: Check wiring between inverter and motor for damage. Check motor insulation resistance. Note: This feature protects the inverter, not humans.
E 15 Input over-voltage	Cause: Input over-voltage detected after the inverter has been in Stop Mode for 100 seconds. Remedy: Check the main power supply voltage. Wait for the voltage to stabilize. Once the fault is cleared, the inverter can enter Run Mode again.
E 21 Inverter thermal trip	Cause: Inverter internal temperature is above the threshold. Thermal sensor detected excessive temperature of power devices. Remedy: Check if cooling fan is running. Check for blocked air vents or heatsink dust. Reduce ambient temperature. Reduce carrier frequency or load.
E 30 Driver error	Cause: Internal inverter error at the safety protection circuit between CPU and main driver unit. Excessive electrical noise may be the cause. Remedy: Check proper grounding and noise suppression. Cycle power. If persistent, replace unit/board.
E 35 Thermistor error	Cause: Thermistor connected to terminals [6] and [L] has sensed temperature is too high. Remedy: Check motor temperature. Check thermistor wiring and connection at terminals [6] and [L]. Verify thermistor settings.
E 37 Safety Stop	Cause: Safety stop signal is given. Remedy: Identify source of Safety Stop signal. Reset the safety circuit.
E 60 Communications error	Cause: The inverter’s watchdog timer for the communications network has timed out. Remedy: Check communication cables and connections. Check master controller status. Verify baud rate and communication settings.
– – – Under-voltage (brownout) with output shutoff	Cause: Low input voltage caused the inverter to turn OFF output and try to restart. If restart fails, this alarm trips. Remedy: Check power supply stability. Check for voltage sags or brownouts on the line. Press Stop/Reset to clear if power is restored.

How to Read X200 Faults via Monitor Mode

To perform accurate diagnostics in 2026, you should utilize the drive’s internal trip history. The X200 records specific electrical data at the moment of failure in the Monitor (d) parameter group.

Trip History (d081 to d083): The X200 stores the last 3 trip events. Navigate to parameter d081 to see the most recent fault. Parameters d082 and d083 show the previous two errors.
Status Snapshot: When viewing a trip code in d081, the display will alternate between the error code and the inverter status—showing the output frequency, motor current, and internal DC bus voltage present at the time of the trip.
PC Software: You can also connect a PC using the ProDrive or PC-Editor software via the RS485 port to download full parameter sets and detailed error logs for advanced analysis.

General Troubleshooting Steps

Before attempting to reset a major trip on the Hitachi X200, perform these essential hardware checks:

Overcurrent (E01 – E04): If the drive trips on OC during acceleration, check for mechanical jams or check if the F002 (Acceleration Time) is too short for the load inertia.
Overvoltage (E07): This often happens with high-inertia loads. If the load “pushes” the motor during deceleration, increase the F003 (Deceleration Time) or check for a surge in the input power supply.
Under-voltage (E09): Check the input power stability. A drop in line voltage or a loose input terminal connection is a common cause of E09 trips in industrial environments.

Frequently Asked Questions (FAQ)

Q: How do I reset a fault on the Hitachi X200?

A: Once the cause of the trip is resolved, you can reset the inverter using three methods:

Press the Stop/Reset key on the integrated keypad.
Activate the RS (Reset) digital input terminal (Terminal 5 is usually the factory default reset input).
Perform a full power cycle (Turn power OFF, wait for the display to go blank, then Turn ON).

Q: What is the “USP” error on my display?

A: USP (Unattended Start Protection) is a safety feature. It occurs if the “Run” command is already active when the drive is powered up. This prevents an unexpected motor start. Turn the Run command OFF to clear the “USP” message.

Q: Why does my drive show “E14” (Ground Fault)?

A: E14 indicates that current is leaking to the earth on the output side. This is often caused by damaged motor insulation or moisture in the conduit. Do not ignore this fault, as it can damage the internal IGBTs.

Q: Where is the fault history stored?

A: Navigate to the Monitor Mode on the keypad. Access parameters d081, d082, and d083 to view the error codes for the last three protective events. Pressing the “Enter” key on these parameters will reveal the drive conditions at the time of the error.