Lenze 347448 8104_E.5C.21 Frequency Inverter
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Product Information
The Lenze 347448 (Model 8104_E.5C.21) is a 2.2 kW frequency inverter from the Lenze 8100 Series, designed for speed control of standard 3-phase AC asynchronous motors. Operating on a 3-phase input voltage range from 320 V AC to 528 V AC, this AC drive delivers a continuous output current of 5.6 A with a mains rated current of 6.0 A. It supports linear and quadratic V/f characteristic control as well as sensorless vector control across output frequencies ranging from 0 Hz to 480 Hz. Featuring a default switching frequency of 8 kHz, the unit integrates an internal brake chopper circuit and interference suppression filtering, reducing overall cabinet space and external component requirements.
Interfacing with external automation systems is handled via plug-in control terminals and a dedicated communication slot that accepts optional fieldbus modules including LECOM RS232/RS485, PROFIBUS-DP, or CANopen. Putting a spare unit into service requires transferring configuration data to match the operational characteristics of the installed motor and host network. The inverter features dual non-volatile EEPROM memory storing up to two complete parameter sets. Configuration backup and restoration can be completed using the pluggable Lenze 8201BB Keypad Operating Module or Lenze Global Drive Control (GDC) software. ABC Industrial Parts can support maintenance teams requiring parameter extraction from a donor unit or pre-configuration before site installation.
Drive monitoring and diagnostic indication are provided by front cover status LEDs, including a green LED for operation readiness and a red LED indicating TRIP or error conditions. Diagnostic data can also be accessed via the keypad parameter display using C003 TRIP codes, the GDC online monitor, or relay output terminals X5/28-29 for alarm signaling. When faults such as overcurrent, DC bus overvoltage or undervoltage, or internal component overheating occur, the drive records the event in a fault history buffer. First-line troubleshooting should include verifying line voltage, checking motor cables for short circuits or ground faults, and inspecting cabinet ventilation. Internal power or hardware failures, such as code H05, are not field-serviceable, making unit repair or a pre-tested exchange module through ABC Industrial Parts the recommended solution to minimize equipment downtime.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 347448 |
| Model / Type | 8104_E.5C.21 |
| Component Type | Frequency Inverter |
| Product Family | 8100 Series |
| Rated Power | 2.2 kW |
| Supply Voltage Range | 320 V AC to 528 V AC (3-phase) |
| Mains Rated Current | 6.0 A |
| Continuous Output Current | 5.6 A |
| Output Frequency Range | 0 Hz to 480 Hz |
| Switching Frequency | 8 kHz |
| Control Method | V/f Characteristic (Linear/Quadratic) and Sensorless Vector Control |
Programming and Configuration
The Lenze 347448 frequency inverter features dual non-volatile EEPROM parameter set storage onboard. This internal memory setup allows two full profiles to be maintained on the drive, simplifying parameter management and enabling rapid configuration transfer during drive replacement.
Parameter management, commissioning, and drive setup can be performed directly using the pluggable Lenze 8201BB Keypad Operating Module or via a PC connection using Lenze Global Drive Control (GDC) software. Through GDC software or the keypad, users can write parameter values, backup custom drive profiles, and copy configuration data directly into a replacement 347448 unit.
Communication and System Integration
System integration for the Lenze 347448 is implemented through plug-in control terminals and a modular automation slot. Control wiring relies on removable terminal blocks, simplifying drive wiring and swapping during maintenance.
The modular communication slot supports optional fieldbus modules to connect the drive into wider plant control networks. Available communication interface options include LECOM RS232/RS485 modules, the LECOM-LI PROFIBUS-DP module, and a CANopen module. Hardwired fault notification to higher-level controllers is available via dedicated relay output terminals X5/28-29, which signal TRIP alarm conditions.
Diagnostics and Status Indication
Real-time diagnostic feedback on the Lenze 347448 drive is accessible through front cover status LEDs, an internal fault history buffer, and relay output contact signaling. Front-panel LEDs provide immediate visual verification of power input status and active error states.
Detailed fault evaluation can be carried out using the pluggable keypad display to read C003 TRIP error codes or by monitoring online status through Lenze Global Drive Control (GDC) software. Diagnostic codes logged in the drive fault buffer record events such as overcurrent, overvoltage, undervoltage, and thermal trips.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| TRIP / Fault | Red - Solid / Flashing | Indicates drive error or TRIP condition |
| Ready / Operation | Green - Solid | Indicates supply voltage present and drive ready for operation |
Replacement and Spare Part Considerations
When replacing an existing Lenze 347448 (Type 8104_E.5C.21) frequency inverter, match the specific part number and model designation to ensure electrical compatibility with the installed 3-phase 400/480 V AC mains supply and 2.2 kW motor load. Verify that any fitted communication module, such as PROFIBUS-DP, CANopen, or LECOM, is transferred to the replacement unit.
Because a replacement unit must match the parameter configuration of the original drive, parameter sets saved in EEPROM should be downloaded to the spare prior to operation. If a complete system redesign is planned, standard Lenze transition paths for discontinued 8100 series units include the 8200 Vector or i550 series inverters. However, installing a direct 347448 spare avoids panel modification and PLC program revisions.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Overcurrent during acceleration | Short circuit or excessive load during motor acceleration phase. | Short circuit in motor cable; motor power too high for drive; acceleration time set too short; earth fault. | Check motor and wiring for short circuit or ground fault; increase acceleration time; verify motor sizing. |
| OC2 | Overcurrent during deceleration | Excessive load or short circuit during motor braking/deceleration phase. | Deceleration time set too short; steep ramp; motor cable short circuit. | Increase deceleration time; check motor wiring; verify brake chopper/resistor setup. |
| OC5 | Overcurrent during constant operation | Drive current exceeded threshold during steady-state operation. | Abrupt load surge; mechanical blockage; motor phase short circuit. | Check mechanical drive train for binding; inspect motor cables and connections. |
| OU | Overvoltage in DC bus circuit | DC bus voltage exceeded upper limit. | Excessive regenerative energy during deceleration; mains voltage too high; brake chopper fault or missing brake resistor. | Increase deceleration time; install external brake resistor; check mains supply voltage. |
| LU | Undervoltage in DC bus circuit | DC bus voltage dropped below minimum operating limit. | Mains supply failure; phase loss; mains voltage too low; momentary power outage. | Check mains voltage and supply line connections; verify input fuses. |
| OH | Heatsink Overtemperature | Inverter heatsink temperature exceeded maximum permissible limit. | Ambient temperature too high; inadequate ventilation/cooling; dirty heatsink; fan failure. | Improve enclosure ventilation; clean heatsink cooling fins; verify ambient operating temperature. |
| OH3 | Motor Overtemperature | Motor thermistor/PTC contact triggered trip. | Motor overload; inadequate motor cooling at low speeds; defective PTC sensor wiring. | Check motor loading; check PTC sensor wiring; allow motor to cool down. |
| OH4 | Inverter internal overtemperature | Thermal sensors inside control card triggered trip. | Control box ambient temperature excessive; internal fan failed. | Check control cabinet cooling; verify internal fan operation. |
| Ce0 | Communication fault | Communication failure on optional fieldbus interface or LECOM port. | Interrupted communication cable; incorrect baud rate; master system fault. | Check bus cable connections, screening, and termination resistors; check host protocol settings. |
| EEr | EEPROM memory fault | Internal EEPROM checksum error or write fault during parameter storage. | Internal EEPROM memory corruption or hardware memory failure. | Re-initialize unit to factory default settings; if fault persists, internal hardware error requires repair or replacement of the unit. |
| H05 | Hardware fault | Internal hardware or power section fault detected. | Power card failure or internal component malfunction. | Internal hardware error — return unit for repair or replace inverter. |
| LP1 | Mains phase failure | Missing phase on mains supply input. | Blown input fuse, loose wire terminal, or supply network imbalance. | Check line supply fuses, main power switch, and input wiring. |
Frequently Asked Questions
What software and modules are used to program the Lenze 347448 drive?
The drive is programmed using Lenze Global Drive Control (GDC) software or directly via the pluggable Lenze 8201BB Keypad Operating Module.
What communication interfaces are supported by the 8104_E.5C.21 inverter?
The drive features a modular communication slot that accepts LECOM RS232/RS485 modules, the LECOM-LI PROFIBUS-DP module, or a CANopen communication module.
How are parameters saved and transferred during unit replacement?
Parameters are stored in dual non-volatile onboard EEPROM memory. Settings can be backed up and restored using the 8201BB keypad or GDC software.
What do the front panel status LEDs indicate on the Lenze 347448?
A solid green LED indicates that supply voltage is present and the drive is ready. A solid or flashing red LED indicates a TRIP fault condition.
What action is required if fault code H05 or EEr appears?
Code EEr indicates an EEPROM memory fault; re-initialize the unit to factory defaults. Code H05 indicates an internal hardware fault. If EEr persists after resetting, or if H05 occurs, the unit requires repair or replacement.
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Data backup and recovery
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Specific firmware and hardware versions
If you are working with specific hardware or firmware versions that are no longer available from the manufacturer, ABC Industrial Parts is your partner. When making your enquiry, clearly state which versions you need, we will then look at the possibilities of supplying those versions, so that your installations continue to function optimally.
Disclaimer:
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