Lenze 9322LP-5C Powerboard 9322 – 9300 Series 0.75kW Power Board
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Product Information
The Lenze 9322LP-5C Powerboard 9322 is a dedicated power section circuit board designed for Lenze 9300 series 0.75 kW (1.0 HP) servo and frequency inverters. Operating within a 3-phase AC supply voltage range of 320 V AC to 528 V AC across line frequencies from 45 Hz to 65 Hz, this power board handles power switching and mains supply conditioning for precise AC motor control. It delivers a continuous rated output current of 2.5 A at a standard 8 kHz switching frequency and supports maximum output frequencies up to 480 Hz. Featuring revision 5C board design enhancements for 500V operating class stability, the unit incorporates screw and plug-in terminal blocks for 3-phase mains supply, motor connections, and dedicated DC bus terminals (+UG, -UG) for intermediate bus coupling and brake chopper integration.
Interfacing directly with the attached 9300 series control card via an internal ribbon connection, the 9322LP-5C allows maintenance technicians to replace a damaged power stage without disturbing stored drive configurations. Because operational parameters reside on the control card's non-volatile EEPROM, swapping the power board preserves parameter sets and avoids extensive reprogramming. Integration with external control networks is achieved through optional communication modules connected to the host drive, including PROFIBUS-DP options such as EMF2133IB and EMF2131IB, or CANopen interfaces like EMF2173IB and EMF2178IB. Drive parameters and diagnostic status can be accessed using Global Drive Control (GDC) software or an attached Keypad XT EMZ9371BC. ABC Industrial Parts can assist maintenance teams with tested replacement boards to keep production systems operational.
Comprehensive onboard hardware protections monitor operating conditions to prevent damage to the inverter power stage and connected motor. Diagnostics are indicated directly via onboard status LEDs for drive ready, active trip, and pulse inhibit states, while detailed TRIP fault codes can be read from parameter C0168 using GDC software or the Keypad XT display. Monitored fault conditions include short circuit (OC1), earth faults (OC2), Ixt overload (OC5), DC bus overvoltage (OU), DC bus undervoltage (LU), heatsink overtemperature (OH), and motor overtemperature (OH4). If persistent overcurrent or internal hardware faults such as H05 occur even when motor cables are disconnected, internal power stage degradation is indicated. In these circumstances, component-level field repairs are not feasible, and replacing the power board or securing a repaired exchange unit through ABC Industrial Parts offers the quickest path to restoring machine operation.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 9322LP-5C |
| Model / Type | Powerboard 9322 |
| Component Type | Power Section Circuit Board |
| Product Family | 9300 |
| Rated Power Output | 0.75 kW |
| Rated Power Output (HP) | 1.0 HP |
| Supply Voltage Range | 320 - 528 V AC |
| Mains Frequency Range | 45 - 65 Hz |
| Rated Output Current | 2.5 A |
| Maximum Output Frequency | 480 Hz |
| Switching Frequency | 8 kHz |
Programming and Configuration
Drive setup and parameter adjustment for inverters utilizing the 9322LP-5C powerboard are performed through the connected 9300 series control card. Operational parameters and drive configurations are stored in non-volatile EEPROM memory located on the control card, allowing the power board itself to be swapped without losing drive settings or motor tuning data.
Commissioning and monitoring can be carried out using Lenze Global Drive Control (GDC) software connected via the system bus or standard programming interfaces. Alternatively, the plug-in Keypad XT EMZ9371BC provides direct access to parameter menus and diagnostic values. When performing maintenance, parameter buffer C0168 retains historical fault codes to aid in troubleshooting, while factory default parameters can be reloaded if configuration data becomes corrupted.
Communication and System Integration
The 9322LP-5C powerboard integrates into the broader Lenze 9300 drive architecture, linking the power section with system-level control networks. An integrated CAN system bus interface enables high-speed data exchange between multiple drives and higher-level controllers across automated machine networks.
To support diverse industrial fieldbus standards, host inverters equipped with the 9322LP-5C accept optional communication modules. PROFIBUS-DP connectivity is supported via EMF2133IB and EMF2131IB option cards, while CANopen network integration is supported through EMF2173IB and EMF2178IB modules. Proper network termination using 120-ohm resistors and correct baud rate matching are required to prevent bus communication errors such as fault code CE0.
Diagnostics and Status Indication
The 9322LP-5C power board provides hardware status feedback through three primary LED indicators located on the unit. These LEDs allow maintenance personnel to assess operational status, verify pulse enable states, and identify fault trip conditions at a glance.
For detailed diagnostic evaluation, the host 9300 drive records operational parameters and active fault conditions accessible via the Keypad XT EMZ9371BC display or Global Drive Control (GDC) software. Diagnostic monitors in GDC display live operational metrics, while parameter code C0168 provides a fault history log for root-cause analysis.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY / OK | Green - Solid / Active | Drive stage is ready for operation / operational; no active fault |
| DRIVE TRIP / FAULT | Red - Solid / Active | Active fault trip condition detected; pulse inhibit activated |
| IMP / Pulse Inhibit | Yellow - Solid / Active | Power stage pulses inhibited / controller disable active |
Replacement and Spare Part Considerations
Replacing a failed power stage with a genuine Lenze 9322LP-5C board allows operators to restore 0.75 kW (1.0 HP) 9300 series inverters to full working order without purchasing a complete replacement drive. When selecting a replacement board, ensure that the part number matching 9322LP-5C and hardware revision 5C align with the host drive requirements to maintain full 500V class voltage ratings and mechanical fit.
Because the drive's control card and non-volatile EEPROM store parameter profiles, motor parameters, and fieldbus configurations, board replacement can be completed with minimal downtime. Prior to installing the replacement powerboard, verify that mains supply power and DC bus voltage are fully discharged. After hardware installation, inspect motor wiring, brake resistor connections, and grounding points before re-energizing the system.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Short Circuit / Overcurrent | Short circuit at motor terminals or power section overcurrent triggered instantly | Short circuit in motor cable, short circuit in motor windings, power stage transistor defect, extreme acceleration rate | Check motor and output cabling for short circuit or earth fault. Inspect powerboard IGBT stage. If persistent without connected cable, powerboard hardware is defective — return for repair. |
| OC2 | Earth Fault / Ground Fault | Earth fault detection on output motor phases | Motor winding grounded, output cable insulation failure, capacitive leakage current high | Check insulation resistance of motor cable and motor. Inspect power stage ground path. |
| OC5 | Ixt Overload | Drive overload stage reached continuous current limit threshold | Excessive mechanical load, motor size mismatched to drive power rating, improper ramp setting | Check drive load, acceleration ramps, and current limit settings. |
| OU | DC Bus Overvoltage | DC bus voltage exceeded maximum allowable threshold limit | Regenerative energy from motor overhauling load too high, deceleration ramp too fast, brake resistor damaged or not connected | Extend deceleration time (QSP / deceleration ramp), connect or check brake chopper / braking resistor. |
| LU | DC Bus Undervoltage | DC bus voltage dropped below minimum operating limit | Mains supply failure, supply voltage drop, line fuse blown, powerboard pre-charge relay fault | Verify 3-phase AC supply line voltage and pre-charge circuit on powerboard. |
| OH | Heatsink Temperature High | Power stage heatsink sensor exceeded maximum operating temperature threshold | Inadequate cabinet ventilation, heat sink fan blocked/failed, ambient temperature too high | Clean heatsink, verify cooling fan operation on 9322 board, reduce ambient temperature. |
| OH4 | Motor Over-Temperature | Motor thermal sensor (PTC/TK) tripped | Motor overloaded, thermal contact opened, sensor connection interrupted | Allow motor to cool down, check load and thermal sensor wiring on terminals T1/T2. |
| CE0 | CAN Communication Error | Communication failure on integrated CAN / System Bus interface | Bus cable disconnected, incorrect baud rate, missing bus termination resistor | Check CAN wiring, shield connection, baud rate setting, and 120-ohm termination resistors. |
| EER | EEPROM Fault | Non-volatile memory checksum failure or corrupted configuration data | Interrupted parameter saving, EEPROM memory chip failure | Reload factory defaults or parameter set file. If error persists, control card hardware defect — contact service. |
| H05 | Internal Hardware Fault | Internal power board or control card hardware detection error | Internal supply failure on powerboard 9322LP-5C, gate driver circuit fault, ribbon cable fault | Internal board failure — not field-serviceable. Replace powerboard or return unit for repair. |
Frequently Asked Questions
How do I replace the 9322LP-5C powerboard without losing parameter settings?
Drive parameters are stored on the attached 9300 series control card's non-volatile EEPROM. Replacing only the 9322LP-5C powerboard retains all parameter settings and motor configurations stored on the control card.
What drive models are compatible with the Lenze 9322LP-5C powerboard?
The 9322LP-5C is engineered specifically for Lenze 9300 series 0.75 kW (1.0 HP) servo and vector inverters operating on 3-phase AC supply voltages from 320 V to 528 V.
What software and keypads can be used for diagnostics on this power board?
Diagnostics and parameter access can be performed using Lenze Global Drive Control (GDC) software or the optional Keypad XT EMZ9371BC display.
What does an OC1 fault code indicate on the 9322LP-5C?
An OC1 code indicates an overcurrent or short circuit condition at the motor terminals or power section. If the error persists after disconnecting the motor cable, the power stage transistor or hardware is defective.
Which communication protocols are supported when using this powerboard?
The system supports the integrated CAN system bus, PROFIBUS-DP via EMF2133IB or EMF2131IB modules, and CANopen via EMF2173IB or EMF2178IB modules.
What should be checked if an H05 fault appears?
Fault H05 indicates an internal hardware failure within the powerboard or control card, such as a gate driver circuit or power supply defect. This condition is not field-serviceable and requires board replacement or repair.
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