Hitachi SJ200 Fault Codes & Troubleshooting List 2026 – Troubleshoot your Hitachi SJ200 inverter with our updated 2026 guide. Learn to interpret E01-E60 error codes, view trip history via parameter d081, and reset faults to minimize downtime.
The Hitachi SJ200 is a high-performance, compact sensorless vector drive widely utilized in 2026 for its robust torque control and reliable industrial performance. When the drive detects an internal or external error, it activates a protective function and displays a 3 or 4-digit error code starting with “E” (e.g., E01, E07, E14) on its LED keypad.
This guide provides the most updated resources for 2026 to help you diagnose these error codes and restore your machinery to operation quickly.
Hitachi SJ200 Fault Codes Reference Table
Below is the complete list of protective functions and alarm codes. Please refer to this table to match the “E” code on your display with the specific hardware or load issue.
| Fault Code and Meaning | Cause and Remedy |
|---|---|
| E01 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. These conditions cause excessive current for the inverter, so the inverter output is turned OFF. The dual-voltage motor is wired incorrectly. Remedy:
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| E02 Over-current event during deceleration | 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:
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| E03 Over-current event during acceleration | 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:
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| E04 Over-current event during other conditions | 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:
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| E05 Overload protection | Cause: When a motor overload is detected by the electronic thermal function, the inverter trips and turns OFF its output. Remedy:
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| E06 Braking resistor overload | Cause: When the regenerative braking resistor exceeds the usage time allowance or usage ratio, the inverter trips and turns OFF its output to the motor. Remedy:
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| E07 Over-voltage protection | Cause: When the DC bus voltage exceeds a threshold, due to regenerative energy from the motor. Remedy:
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| E08 EEPROM error | Cause: 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. Remedy:
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| E09 Under-voltage error | Cause: 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. Remedy:
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| E11, E22 CPU error | Cause: A malfunction in the built-in CPU has occurred, so the inverter trips and turns OFF its output to the motor. Remedy:
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| E12 External trip | Cause: A signal on an intelligent input terminal configured as EXT has occurred. The inverter trips and turns OFF the output to the motor. Remedy:
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| E13 USP (Unattended Start Protection) | Cause: When the Unattended Start Protection (USP) is enabled, an error occurred when power is applied while a Run signal is present. Remedy:
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| E14 Ground fault | Cause: The inverter is protected by the detection of ground faults between the inverter output and the motor during powerup tests. Remedy:
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| E15 Input over-voltage | Cause: 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. Remedy:
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| E21 Inverter thermal trip | Cause: 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. Remedy:
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| E23 Gate array error | Cause: An internal inverter error has occurred in communications between the CPU and gate array IC. Remedy:
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| E35 Thermistor | Cause: When a thermistor is connected to terminals [6] and [L] and the inverter has sensed the temperature is too high, the inverter trips and turns OFF the output. Remedy:
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| E60 Communications error | Cause: The inverter’s watchdog timer for the communications network has timed out. Remedy:
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| – – – Under-voltage (brown-out) with output shutoff | Cause: Due to low input voltage, the inverter turns its output OFF and tries to restart. If it fails to restart, then the alarm trips to record the under-voltage error event. Remedy:
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How to Read SJ200 Faults via Monitor Mode
The Hitachi SJ200 stores detailed diagnostic information for the last three trip events. In 2026, using the Monitor (d) group is the standard method for on-site troubleshooting.
- Trip History (d081 to d083): Parameter d081 displays the most recent fault. Parameters d082 and d083 show the two previous failures.
- Status Snapshot: When viewing a trip in d081, the display will alternate between the error code and the inverter’s electrical status (Output Frequency, Current, and DC Bus Voltage) recorded at the exact moment of the trip.
- ProDrive Software: For advanced diagnostics, you can connect a PC to the SJ200 via the RS485 communication port. This allows you to download full parameter sets and check historical trip logs for recurring patterns.
General Troubleshooting Steps
Before performing a manual reset on your Hitachi SJ200, perform these essential hardware checks:
- Overcurrent (E01 – E04): E01 (Accel), E02 (Decel), and E03 (Constant Speed) indicate a current spike. Check for short circuits in the motor wiring or a jammed load. Try increasing the F002 (Acceleration Time).
- Overvoltage (E07): This usually occurs when a high-inertia load decelerates too quickly. Increase the F003 (Deceleration Time) or verify that the input voltage is within the specified range.
- Under-voltage (E09): Check for a sag in the input AC line. This is often caused by a loose power connection or an undersized transformer supplying the drive.
Frequently Asked Questions (FAQ)
Q: How do I reset a Hitachi SJ200 fault?
A: Once the cause is resolved, you can reset the drive using one of these methods:
- Press the Stop/Reset key on the digital keypad.
- Close the digital input terminal assigned to the RS (Reset) function (Terminal 5 is the default).
- Cycle the input power (Wait until the display goes completely dark before turning the power back on).
Q: What is the “USP” error on my display?
A: USP (Unattended Start Protection) is a safety feature, not a hardware fault. It occurs if the “Run” command is active when the drive is powered up. Turn the Run command OFF to clear the error.
Q: Why does my drive show “E14” (Ground Fault)?
A: E14 indicates that current is leaking to the earth on the output side. Check your motor windings and cable insulation for damage. Do not ignore this trip, as it can cause damage to the drive’s internal transistors.
Q: Where is the fault history located?
A: Navigate to Monitor Mode on the keypad. Parameters d081, d082, and d083 store the fault history. Pressing the “Store” or “Enter” key on these parameters will reveal the drive conditions at the time of the event.