Amtech Axpert-Eazy AMT-250-4

Questions and Answers

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Sydney HenrySep 5, 2025
What causes Output Current Unbalance in Amtech Axpert-Eazy AMT-250-4?
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  Michelle WilliamsSep 5, 2025
  Output Current Unbalance in Amtech DC Drives can stem from various factors. Ensure that the parameters are set properly. Abnormal setting of V/F, Torque Boost, Acceleration time and Speed search function related parameters and current limit may result in output current unbalance. Increase the acceleration time (A201 / A203). If fault occurs during deceleration, increase the deceleration time (A202 / A204). Abnormal setting of DC braking parameters can result in unbalance current fault during deceleration. Reduce the dc braking start frequency (A306) and dc braking time (A308) settings if used.
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Caitlin MiddletonNov 19, 2025
What to do if Amtech Axpert-Eazy AMT-250-4 DC Drives show an Over Current Fault?
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  torreslindaNov 20, 2025
  If your Amtech DC Drive displays an Over Current Fault, several issues could be the cause. First, the power module(s) in the main circuit might be damaged, so switch off the power supply and check them. Second, there may be a loose or improper connection of the current sensor cable, or a short in the cable. In this case, switch off the power supply, remove the cable, and inspect it for proper crimping on both sides. Reinsert the cable securely. If the issue persists, replace the cable. Third, the current sensor itself may have failed, so switch off the power supply, remove the current sensor, and check. If no fault is observed, replace the damaged current sensor. Fourth, the fault may originate from the Driver Board. Switch off the power supply and remove the FRC (in case of wire interface...
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Tammy PetersSep 18, 2025
What to do if Amtech DC Drives show an EEPROM Fault?
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  Matthew HarrisonSep 18, 2025
  If your Amtech DC Drive is showing an EEPROM Fault, it means the data received from the EEPROM is incorrect or out of range. On fault reset, default values will be stored in the EEPROM. If the fault occurs again after power recycling, replace PCA-2014A.
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Alicia HunterSep 16, 2025
How to troubleshoot Auto Tuning Fault in Amtech Axpert-Eazy AMT-250-4?
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  Timothy JosephSep 16, 2025
  If you encounter an Auto Tuning Fault in your Amtech DC Drive, it means the auto-tuning process has failed. The motor parameter setting value may be incorrect, so set the correct motor parameter. Ensure that the motor is directly connected to the inverter, removing any additional components like output chokes during auto-tuning.
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greermatthewSep 14, 2025
What to do if Amtech DC Drives show an External Fault?
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  Mackenzie SanchezSep 14, 2025
  If your Amtech DC Drive displays an External Fault, the signal for the external fault is present at the PSI. Check and correct it. If the signal is not present, remove the selection of the external fault with the help of Mode-C parameters. There may be a problem in PCA-2014A, so remove the control board PCA-2014A.
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Raymond HinesSep 12, 2025
What does Reference Missing mean on Amtech Axpert-Eazy AMT-250-4?
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  cooperchadSep 12, 2025
  If your Amtech DC Drive shows Reference Missing, the analog current input reference (4-20 mA) to the unit is below 3 mA. Check the voltage level at FSI terminal of PCA-2014A.
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Matthew King MDSep 12, 2025
What causes Under Current Fault in Amtech Axpert-Eazy AMT-250-4 DC Drives?
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  Diana WheelerSep 12, 2025
  An Under Current Fault in Amtech DC Drives may occur if the Under Current Limit B304 is set too low. Disable the feature by setting 0% in B304.
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Rita ElliottSep 9, 2025
What to do if my Amtech Axpert-Eazy AMT-250-4 have Charging Fault?
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  Amy RussellSep 9, 2025
  If your Amtech DC Drive displays a Charging Fault, the DC bus voltage didn’t reach the predefined voltage level within 5 seconds after power up. The soft charge resistor may be open. One or more phases may have failed. DC bus voltage feedback may be missing. Ensure proper connection of DC bus voltage feedback at J9.
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santanadeanSep 7, 2025
What to do if Amtech DC Drives show an Output Phase Loss?
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  Daniel ClarkSep 7, 2025
  If your Amtech DC Drive indicates an Output Phase Loss, it could be due to a single phasing of the motor, so disconnect and check the motor. It can also happen if one or more output cables are open or loosely connected, so check the output connections and correct it.
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kellimartinezAug 22, 2025
What causes Amtech DC Drives to have an Over Voltage Fault?
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  fisheremilyAug 22, 2025
  An Over Voltage Fault in Amtech DC Drives can occur if the power supply voltage rises above specified limits (785 VDC for 400 V series, 965 VDC for 500 V series, or 1160 VDC for 600 V series). Reduce the voltage to stay within the correct range. It can also happen if the speed is fluctuating.

Summary

Chapter 2: Installation and Wiring

2-1 Installation Environment

Guidelines for selecting a suitable installation location and ventilation space.

2-2 Precautions for Power Supply and Motor Wiring

Critical safety warnings and procedures for connecting power and motor wiring.

2-4 Precautions for Control Signals Wiring

Safety guidelines and methods for wiring control signals to the AC drive.

Chapter 3: Digital Operation Panel (LCD Keypad Module)

3-1 Drive Status

3-3 Parameter Display & Setting

How to navigate, display, and set parameter values using the operation panel keys.

Chapter 4: Test Operation and Adjustment

4-1 Preparation Before Turning Power ON

Essential checks and preparations before applying power to the AC drive.

4-3 Automatic Tuning & Adjustment

Procedure for performing automatic motor tuning to optimize performance.

Chapter 5: Control Input; Output Terminals

5-1 Input; Output Terminal Functions of PCA-2014 A (Control Unit)

Detailed description of the functions of each terminal on the control unit.

5-2 Programmable Sequence Input (PSI) Wiring

5-4 Programmable Analog Output (PAO) Wiring

5-5 Programmable Sequence Output (Open Collector Type) Wiring

Chapter 6: Parameter Settings & Functions

MODE-M: Monitor Parameters

Parameters for monitoring various operating data, status, and system information.

MODE-A Parameter

Parameters for selecting start/stop methods, delay times, and DC braking functions.

MODE-A Parameter

Parameters for setting V/F curves, base frequency, and voltage characteristics.

MODE-B Parameters

Parameters for setting stall current limit and adjustable over-current levels.

MODE-B Parameters

Parameters for speed loop time, proportional and integral gains for ASR.

MODE-C Parameters

Parameters for enabling PID control, setting reference input, and feedback selection.

MODE-D: Auxiliary Drive Parameters

MODE-E: Ring Spinning Frame (RSF) Function Parameters

MODE-G: Pattern Run Function Parameters

MODE-H: Special Application Function Parameters

Parameters for controlling multiple pumps, including start/stop hold times and changeover.

MODE-P: In-Built PLC Command Parameters

MODE - A

Parameters for setting local frequency, minimum, maximum, and jog frequencies.

A106: Frequency Reference Input

Selecting the speed reference input source for the AC Drive.

GROUP - 2: ACCELERATION; DECELERATION

Parameters for configuring acceleration and deceleration times, including S-curve settings.

GROUP - 3: START; STOP SELECTION & DC BRAKING

Selecting the method for starting the AC drive (Local, Terminal, Serial).

GROUP - 4: V; F CHARACTERISTICS

Parameters for setting V/F curves, base frequency, and voltage characteristics.

GROUP - 5: TORQUE BOOST

Manually setting the boost voltage at 0Hz as a percentage of motor voltage.

MODE - B

Selection of automatic tuning mode and basic motor parameters.

MODE - B

Settings for reverse direction lock, password protection, and default value loading.

GROUP - 4: LIMITING PARAMETER

GROUP - 4: PRESET SPEED

GROUP - 6: VECTOR CONTROL CONSTANTS-1

Setting the level for over speed protection to prevent tripping.

GROUP - 7: VECTOR CONTROL CONSTANTS-2

Selecting Torque control mode instead of Speed control for vector control.

MODE - C

Configuring programmable sequence outputs (PSO) for various functions like Run, Local, and Freq Attain.

MODE - C

GROUP - 4: SERIAL COMMUNICATION

GROUP - 5: AUTO RESTART & SPEED SEARCH FUNCTION

Selecting the stopping method for emergency stop operations.

GROUP - 6: PID CONTROL SELECTION

PID Controller

MODE - D: AUXILIARY DRIVE PARAMETERS

MODE - E: RING SPINNING FRAME (RSF) FUNCTION PARAMETERS

MODE - G: PATTERN RUN FUNCTION PARAMETERS

MODE - H: SPECIAL APPLICATION FUNCTION PARAMETERS

MODE - P: IN-BUILT PLC COMMAND PARAMETERS

In-built PLC Function Explanation:

CHAPTER-7 ELECTRONICS CIRCUIT BOARDS

CHAPTER-8 MAINTENANCE, INSPECTION AND PART REPLACEMENT

CHAPTER-10 ENCODER SPECIFICATIONS

CHAPTER-11 SERIAL COMMUNICATION SET-UP

CHAPTER-12 UL INSTRUCTIONS

CHAPTER-13 CE MARKING

13-3 Wiring & Earthing

13-6 Insulation test

Appendix-B: Fault Codes

Appendix-C: Trouble Shooting Guidelines

Amtech Axpert-Eazy AMT-250-4 Specifications

General

Overload Capacity	150% for 60 seconds
Enclosure Rating	IP20
Control Method	PWM (Pulse Width Modulation)
Protection Features	Overcurrent, Overvoltage, Short Circuit
Control Terminals	Direction
Storage Temperature	-20°C to +60°C