Lenze ESMD752L4TXA - User Manual

Questions and Answers

L
Lee WilliamsAug 23, 2025
What to do if Lenze DC Drives show a short-circuit or overload?
- V
  Virginia GrayAug 25, 2025
  If the Lenze DC Drives indicate a short-circuit or overload, the cause may be a short-circuit. You should find the reason for the short-circuit and check the motor cable. It can also be caused by excessive capacitive charging current of the motor cable, in this case use shorter motor cables with lower charging current. If the acceleration time is too short, increase the acceleration time and check the controller selection. Also, check wiring if the motor cable is defective and check the motor for internal faults. If there is frequent and long overload, check the controller selection.
C
chammondSep 1, 2025
How to fix communication error on Lenze Inverter?
- S
  Shannon KelleySep 1, 2025
  If the Lenze Inverter reports a communication error, it could be due to the serial timer timing out. In this case, check the serial link connections.
L
Lauren AlvarezSep 1, 2025
What causes undervoltage on DC bus in Lenze Inverter?
- N
  Nicole ClaySep 1, 2025
  If the Lenze Inverter shows 'Undervoltage on DC bus', the mains voltage might be too low. Check the mains voltage to ensure it is within the required range.
R
riveracorySep 2, 2025
How to resolve Lenze ESMD752L4TXA stop with inhibited outputs?
- M
  Michael EdwardsSep 2, 2025
  If the Lenze Inverter stops and the outputs U, V, W are inhibited, it is because there is a LOW signal at terminal 28. To solve this, set terminal 28 to HIGH.
X
xsanfordSep 3, 2025
How to troubleshoot Dynamic braking fault on Lenze Inverter?
- J
  james50Sep 3, 2025
  If the Lenze Inverter is showing a Dynamic braking fault, it indicates that the dynamic braking resistors are overheating. To resolve this, increase the deceleration time.
D
Dennis BurtonSep 4, 2025
Why is Lenze Inverter output frequency 0 Hz?
- S
  Shane GarzaSep 4, 2025
  If the Lenze Inverter's output frequency is 0 Hz and the outputs U, V, W are inhibited, it could be due to: * Setpoint = 0 Hz (C31 = 0): In this case, you need to perform a setpoint selection. * Quick stop activated through digital input or serial link: Deactivate the Quick stop.
R
rcarrollSep 4, 2025
Why are Lenze Inverter buttons not working?
- M
  Matthew DunlapSep 4, 2025
  If the Lenze Inverter indicates that the remote keypad is active, the buttons on the front of the controller are disabled. This is normal operation when the remote keypad is in use.
M
Melissa LucasSep 5, 2025
What to do for Controller overtemperature on Lenze ESMD752L4TXA?
- B
  Bernard WallSep 5, 2025
  If the Lenze Inverter displays 'Controller overtemperature', it means the controller is too hot inside. To resolve this, reduce the controller load and improve cooling.
F
Francisco MccoySep 6, 2025
What does current limit reached mean on Lenze ESMD752L4TXA Inverter?
- E
  Elizabeth FergusonSep 6, 2025
  If the Lenze Inverter shows 'Current limit reached', it indicates a controllable overload. This is managed automatically, as described in C22.
K
Keith King Jr.Sep 7, 2025
How to fix No access to code on Lenze Inverter?
- T
  Tiffany JacksonSep 7, 2025
  If the Lenze Inverter displays 'No access to code', it means that changes can only be made when the controller is in OFF or 1nh. To proceed, set terminal 28 to LOW or inhibit by serial link.

Summary

Safety Information and General Precautions

General Safety Guidelines for Personnel

Covers live components, heat, unauthorized operation, and personnel qualifications.

Application Directives and Installation Safety

Specifies intended use, machine compliance, and installation handling safety.

Electrical Connection Safety and EMC Notes

Emphasizes national regulations and EMC installation notes for safe electrical connections.

Critical Electrical Hazard Warnings

Highlights dangers of electric shock from charged capacitors and fire risk from protective devices.

Installation Procedures

Electrical Installation and EMC Requirements

Covers EMC requirements, noise emission, and cable screening for electrical installation.

Connection Diagram and Terminal Layout

Visual guide for wiring connections and overview of terminal layout.

Commissioning and Parameter Setup

Parameter Setting and Navigation

Parameter Menu: Password and Setpoint Source

Lists parameters C00 (Password entry) and C01 (Setpoint source) with their settings and importance.

Troubleshooting and Fault Resolution

Status Indicators and General Troubleshooting

Specific Error Codes and Their Remedies

Details error codes cF, CF, FI, CFG, dF, EEr, EF, F2_FO, FC3, FC5, LE, JF and their specific causes and remedies.

Motor Overload and Short Circuit Fault Diagnosis

Explains errors OC1 (Short-circuit/overload), OC2 (Earth fault), OC6 (Motor overload), and their troubleshooting.

Over-temperature, Voltage, and Phase Faults

Covers OH (Controller overtemperature), OU (Overvoltage), St (Auto-TRIP reset), Sd5 (4-20mA reference), and SF (Single phase fault).

Lenze ESMD752L4TXA Specifications

General

Power Rating	0.75 kW
Protection Class	IP20
Series	ESMD
Communication Interface	RS485
Operating Temperature	-10 ... 55 °C
Storage Temperature	-25 ... 70 °C
Relative Humidity	95% (non-condensing)