Hitachi HISCREW Air Compressor Error Codes

(Nov 11 2026 - Views: 3)

Hitachi HISCREW air compressors are widely used in industrial compressed air systems. During operation, the compressor's control system monitors electrical components, motor conditions, discharge temperature, oil circulation, air pressure and other operating parameters.

When an abnormal condition occurs, the controller displays an alarm or shutdown error code to help operators and maintenance technicians identify the problem.

This guide provides a detailed reference table of Hitachi HISCREW air compressor error codes, including error descriptions, possible causes, troubleshooting procedures, detection conditions and reset instructions.

1. Hitachi HISCREW Air Compressor Error Code List

Error Code	Status	Error Description	Possible Causes	Recommended Actions	Detection Conditions	Reset Procedure
E0.01	SHUTDOWN	Reverse phase connection	Incorrect phase sequence in the incoming power supply	Disconnect the power supply and interchange two of the three phase wires according to the electrical wiring diagram	Incorrect phase sequence detected within 3 seconds after power is supplied	Disconnect the power and reconnect the phases correctly
E0.01	SHUTDOWN	Phase loss	One phase of the incoming power supply is missing	Disconnect the power, check the power supply and tighten all power cable connections	Applicable to R and S versions as specified in the manual	Restore the power supply and electrical connections
E0.11	SHUTDOWN	High discharge air temperature	Oil separator element malfunction or end of service life	Inspect the oil separator element and replace it if necessary. Lubricate or replace related components as required	Oil separator outlet temperature reaches 110°C or higher	Press the RESET button
E0.24	ALARM	High discharge air temperature warning	Same possible causes as error E0.11	Perform the same inspections and corrective actions as for E0.11	Oil separator outlet temperature reaches 105°C or higher	Automatically resets
E0.12	SHUTDOWN	Abnormally high discharge air pressure	Oil separator element failure or contactor 52 malfunction	Inspect the oil separator element and replace it if necessary. Check and securely reconnect the contactor 52 wiring	Detected during compressor operation	Press the RESET button
E0.17	SHUTDOWN	Main motor overload	Motor overcurrent, abnormal power supply, excessive discharge pressure or clogged oil separator element (see E0.11)	Check the power supply, voltage and phase imbalance. Correct if necessary. Check and adjust the capacity control system if the discharge pressure setting exceeds the specified limit. Check the motor insulation resistance	Motor overcurrent detected	Press the RESET button
E0.53	SHUTDOWN	Cooling fan motor overload	Fan motor overcurrent, cooling system malfunction or clogged cooler air inlet/outlet	Check the power supply, voltage and phase imbalance. Clean the cooling fins of the oil cooler and aftercooler	Fan motor overcurrent detected	Press the RESET button
E0.18	SHUTDOWN	High discharge air temperature – Stage 1	Excessively high ambient temperature, low oil level, dirty or clogged oil cooler, or dirty or clogged oil filter	Improve machine room ventilation to reduce ambient temperature to approximately 40°C. Disconnect the power and ensure discharge pressure is 0 MPa before adding oil. Replace the oil cooler or oil filter if necessary	Stage 1 discharge air temperature exceeds 110°C	Press the RESET button
E0.23	ALARM	High discharge air temperature warning – Stage 1	Same possible causes as error E0.18	Perform the same inspections and corrective actions as for E0.18	Stage 1 discharge air temperature exceeds 105°C	Automatically resets
E0.31	SHUTDOWN	TH1 temperature sensor failure or disconnection	TH1 temperature sensor failure or disconnected wiring	Disconnect the power supply and inspect the TH1 sensor. Replace it if necessary. Reconnect and secure the TH1 wiring	Operating temperature below -30°C	Press the RESET button
E0.32	SHUTDOWN	TH2 temperature sensor failure or disconnection	TH2 temperature sensor failure or disconnected wiring	Disconnect the power supply and inspect the TH2 sensor. Replace it if necessary. Reconnect and secure the TH2 wiring	Operating temperature below -30°C	Press the RESET button
E0.34	SHUTDOWN	PS pressure sensor failure or disconnection	PS pressure sensor failure or disconnected wiring	Disconnect the power supply and inspect the PS sensor. Replace it if necessary. Reconnect and secure the PS wiring	Pressure reading is 0 MPa during operation	Press the RESET button
E0.47	SHUTDOWN	ROM board error (optional printed circuit board)	ROM failure on the printed circuit board	Disconnect and reconnect the power supply. If the problem persists, inspect the printed circuit board	Error remains after restarting the compressor	Disconnect and reconnect the power. The controller cannot be reused if the fault persists
E0.48	SHUTDOWN	RAM board error (optional printed circuit board)	RAM failure on the printed circuit board	Disconnect and reconnect the power supply. If the problem persists, inspect the printed circuit board	Error remains after restarting the compressor	Disconnect and reconnect the power. The controller cannot be reused if the fault persists
E0.51	SHUTDOWN	Contactor 52 feedback error	Contactor 52 malfunction or incorrect feedback signal	Disconnect the power supply. Inspect contactor 52 and securely reconnect its wiring. Replace the contactor if necessary	Detected during compressor operation	Press the RESET button
E0.57	SHUTDOWN	Cooling fan inverter abnormality	Cooling fan inverter malfunction	Inspect the fan inverter, cooling fan and related wiring according to the technical manual	Cooling fan inverter fault detected	Press the RESET button
E0.66	SHUTDOWN	Cooling fan inverter communication error	Communication failure between the controller and control circuit board	Inspect communication cables, connectors and wiring connections	Communication retry limit exceeded	Press the RESET button
E0.21	ALARM	Clogged air intake filter	Dust accumulation or blockage in the air intake filter	Clean or replace the air intake filter	Filter differential pressure reaches 7.47 kPa	Press the RESET button
E0.22	ALARM	Low oil level (optional)	Insufficient oil level	Check the oil level and refill with the specified compressor lubricant if necessary	Detected by the optional oil level sensor	Follow the reset procedure specified for the compressor model
U100	ALARM	Excessive suction valve loading/unloading cycles	The suction throttle valve has reached a total of 1,000,000 loading/unloading cycles	Replace the consumable components of the suction throttle valve	1,000,000 operating cycles reached	Hold the REMOTE button and press SELECT for more than 7 seconds

2. Important Hitachi HISCREW Error Codes Explained

E0.17 – Main Motor Overload

Error E0.17 indicates that the main compressor motor has experienced an overcurrent condition.

Possible causes:

Low or unstable incoming voltage.
Voltage imbalance between the three phases.
Excessive compressor discharge pressure.
Clogged oil separator element.
Motor insulation deterioration.
Mechanical overload of the compressor airend.

Troubleshooting procedures:

Measure the incoming three-phase voltage.
Measure the current on all three motor phases using a clamp meter.
Compare the measured current with the motor nameplate rating.
Inspect the motor protection relay and electrical connections.
Check the discharge pressure and oil separator differential pressure.
Perform an insulation resistance test using a megohmmeter (Megger), following the manufacturer's testing requirements.

Do not assume that the motor is defective based on error E0.17 alone. Both electrical and mechanical conditions must be checked.

E0.18 – High Discharge Air Temperature

This error indicates that the Stage 1 discharge air temperature has exceeded the specified shutdown limit.

Possible causes:

Low compressor oil level.
Dirty or clogged oil cooler.
Clogged oil filter.
Insufficient cooling airflow.
High ambient temperature in the compressor room.

Troubleshooting procedures:

Check the compressor oil level.
Inspect the oil condition and oil circulation system.
Clean the oil cooler and aftercooler.
Inspect the cooling fan and airflow.
Check the oil filter and replace it if necessary.
Improve machine room ventilation.

E0.11 – High Discharge Air Temperature

Error E0.11 indicates that the oil separator outlet temperature has reached the shutdown threshold.

Possible causes:

Oil separator element malfunction.
Deteriorated oil separator components.
Insufficient oil circulation.
Cooling system problems.

Recommended actions:

Inspect the oil separator element.
Check the oil circulation and return lines.
Inspect the cooling system.
Replace defective components according to the Hitachi maintenance manual.

E0.34 – Pressure Sensor Failure

This error indicates a problem with the PS pressure sensor or its electrical connection.

Troubleshooting procedures:

Inspect the pressure sensor wiring.
Check the electrical connectors.
Compare the controller pressure reading with an independent calibrated pressure gauge.
Inspect the sensor signal according to the wiring diagram.
Replace the sensor only after confirming that it is defective.

E0.21 – Clogged Air Intake Filter

This alarm indicates that the air intake filter differential pressure has reached the specified limit.

Recommended actions:

Inspect the air intake filter.
Clean the filter if it is reusable and permitted by the manufacturer.
Replace the filter if it is damaged or excessively contaminated.
Check the filter differential pressure after maintenance.

3. Important Safety Precautions Before Resetting a Hitachi Air Compressor

Before resetting a Hitachi HISCREW air compressor, maintenance technicians should follow these precautions:

Record the displayed error code before resetting the controller.
Identify and eliminate the root cause of the fault.
Disconnect and isolate the electrical supply before carrying out electrical inspections.
Ensure that the compressor has been fully depressurized before opening any pressurized components.
Check that all safety conditions are satisfied before restarting the machine.
Follow the reset procedure specified in the relevant Hitachi instruction manual.
Never repeatedly reset the compressor without identifying and correcting the underlying problem.

For high-temperature, motor overload and mechanical faults, a thorough inspection is essential before restarting the compressor.

4. Hitachi Air Compressor Maintenance and Repair Services – NHAT HUY

NHAT HUY provides industrial compressed air solutions, maintenance and repair services for Hitachi air compressors in Vietnam.

Our technical services include:

Hitachi screw air compressor troubleshooting and repair.
Electrical control system inspection and repair.
Inverter and variable frequency drive (VFD) troubleshooting.
Oil separator, oil filter and air filter replacement.
Preventive maintenance and periodic servicing.
Hitachi compressor airend overhaul.
Industrial motor inspection and overhaul.
Genuine Hitachi compressor spare parts supply.
Compressed air system design and installation.
Energy efficiency assessment and optimization.

If your Hitachi air compressor displays an alarm or shutdown error code, contact NHAT HUY for technical assistance.

Tags: Hitachi HISCREW Air Compressor Error Codes

CATEGORIES

Hitachi HISCREW Air Compressor Error Codes

2. Important Hitachi HISCREW Error Codes Explained

3. Important Safety Precautions Before Resetting a Hitachi Air Compressor

Before resetting a Hitachi HISCREW air compressor, maintenance technicians should follow these precautions:

4. Hitachi Air Compressor Maintenance and Repair Services – NHAT HUY

NHAT HUY provides industrial compressed air solutions, maintenance and repair services for Hitachi air compressors in Vietnam.

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