Allen-Bradley 20G11RD5P0AA0NNNNN PowerFlex 755 Drive 3 Hp – Repair Service Available
Allen-Bradley 20G11RD5P0AA0NNNNN PowerFlex 755 AC drive, 480V AC, 5 A / 3 Hp normal duty, Frame 1: IP20 open, EMC filter, CM cap disconnected, brake transistor, DC bus terminals. NJT Automation offers mail-in repair for the 20G11RD5P0AA0NNNNN with a 1-year warranty; replacement pricing is available on request.
Mail-in repair available now. Returned with a 1-year warranty. Replacement pricing on request.
Actual NJT inventory photos
| Part Number | 20G11RD5P0AA0NNNNN |
| Price | On Request Previously sold for $999.99 - $1,899.99 USDAvailability and condition determine final quote. |
| Description | PowerFlex 755 AC drive, 3 Hp, 480V AC. |
| Shipping |
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| Warranty | 1-year full-function warranty provided by NJT Automation. Warranty details
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| Returns | 90-day free returns. View return policy |
| Exchange | Send us your defective 20G11RD5P0AA0NNNNN after your purchase for a 10% core credit. We also purchase old or damaged parts outright. |
| Availability | Sourced on request We do not have a 20G11RD5P0AA0NNNNN on the shelf right now. We can source one through our supplier network; request a quote and we confirm availability, price and lead time before you commit. | ||||||||
| Sourcing | Sourced through our Level 1 network of vetted US suppliers. Each unit is checked before it ships and carries the same NJT warranty and return policy as our own stock. Quotes within one hour during business hours; typical delivery 3–5 business days, next-day air available. Sourced parts are not available for local pickup. | ||||||||
| Repairs | 20G11RD5P0AA0NNNNN Mail-In Repair ServiceEstimated: $1,440.00 | ||||||||
Part Number Decoder | PowerFlex 755 AC drive 20G11RD5P0AA0
Decoded from the Rockwell Automation catalog-number structure. Series and firmware revision are printed on the product label, not encoded here. | ||||||||
Series & Revisions | No series in stock today; request a series above. | ||||||||
Intended Use | Designed for high-performance, networked motor control applications. PowerFlex 753 and 755 drives run conveyors, pumps, fans, extruders, cranes, winders and machine axes from 1 to over 1,000 Hp, with embedded EtherNet/IP, safety options, feedback cards and Logix integration via Premier Integration. | ||||||||
Physical Data | Weight and DimensionsWeight13.2 lb (6.00 kg)H × W × D15.8 × 4.3 × 8.3 in. (400.5 × 110 × 211 mm)
Product weight and dimensions are typical manufacturer-published values and may differ by series or option. Shipping box and weight are estimates for freight planning; the packed unit may ship in a different box. | ||||||||
Similar Part Numbers |
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Allen Bradley Information | Technical SpecificationsLifecycle status
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| Category | PowerFlex 755 | ||||||||
| Part Number | 20G11RD5P0AA0NNNNN | ||||||||
| Manufacturer | Allen-Bradley | ||||||||
Previously sold 20G11RD5P0AA0NNNNN
2 soldNJT Automation has supplied and shipped 2 20G11RD5P0AA0NNNNN PowerFlex 755 AC drives in 2024; request a quote and we will source another from our supplier network.
- Sold
- 2 in 2024
- Series
- A × 2
Image gallery21 PHOTOSActual units photographed by NJT
Can the 20G11RD5P0AA0NNNNN be repaired?
Yes. NJT Automation repairs the 20G11RD5P0AA0NNNNN by mail-in: diagnostic evaluation, component-level repair and a functional test, backed by a 1-year full-function warranty.
Option 1
NJT managed repair
- Evaluation
- Free. No repair, no charge.
- Shipping
- Prepaid UPS label both ways.
- Pricing
- $650 minimum. Rush service available.
- Warranty
- 1-year full-function warranty included; 2- and 3-year options.
Option 2
Independent repair bids. Compare quotes from independent repair technicians. Post your repair on RepairMode to receive competitive bids from experienced technicians. Each technician sets their own pricing and warranty.
Common Failures
Failure patterns we regularly see on PowerFlex 755 AC drive hardware like the 20G11RD5P0AA0NNNNN:
- DC bus undervoltage / overvoltage (F4 / F5) from capacitor aging or regen energy
- Input phase loss (F17) and precharge faults following a line-side event
- Heatsink overtemperature (F8) from failed fans or blocked airflow
- Drive will not power up: control power supply or precharge circuit failure
- Main control board or option module faults (EtherNet/IP, safety, feedback cards)
Fault code reference
20G11RD5P0AA0NNNNN Fault Codes
54 codes · 750-PM001
Fault codes a PowerFlex 755 AC drive reports on the HIM fault queue (fault number and text) and the drive's fault status parameters, as documented in Rockwell Automation publication 750-PM001. Use them to narrow a problem down to the unit, its wiring or the application before sending it in for repair.
| Code | Fault | What it indicates |
|---|---|---|
| 2 | Auxiliary Input | An auxiliary input interlock is open; the application is not allowing the drive to energize. |
| 3 | Power Loss | DC bus voltage stayed below the power-loss level for longer than the programmed time. |
| 4 | UnderVoltage | DC bus voltage fell below the undervoltage level. |
| 5 | OverVoltage | DC bus voltage exceeded the maximum value. |
| 7 | Motor Overload | Internal electronic motor overload trip. |
| 8 | Heatsink OvrTemp | Heatsink temperature exceeded 100% of the drive temperature rating. |
| 9 | Trnsistr OvrTemp | The output transistors exceeded their maximum operating temperature. |
| 12 | HW OverCurrent | Output current exceeded the hardware current limit: grounded or shorted motor leads. |
| 13 | Ground Fault | A current path to earth ground greater than 25% of drive rating occurred. |
| 14 | Ground Warning | Ground current exceeded the programmed warning level. |
Show 44 more codes
| 15 | Load Loss | Output torque current fell below the load-loss level for longer than the programmed time. |
| 17 | Input Phase Loss | DC bus ripple exceeded a preset level: check input impedance, phases and fuses. |
| 20 | TorqPrv Spd Band | Commanded speed and motor velocity feedback differ by more than the speed deviation band. |
| 21 | Output PhaseLoss | Current in one or more output phases was lost or stayed below the threshold. |
| 24 | Decel Inhibit | The drive is not following the commanded deceleration because it is limiting bus voltage. |
| 25 | OverSpeed Limit | Motor speed exceeded the overspeed limit. |
| 33 | AuRsts Exhausted | The drive used all programmed auto-restart tries without clearing the fault. |
| 35 | IPM OverCurrent | Current magnitude exceeded the IPM trip level. |
| 36 | SW OverCurrent | Output current exceeded the 1 ms current rating. |
| 38 / 39 / 40 | Phase U / V / W to Grnd | A phase-to-ground fault was detected between the drive and motor in that phase. |
| 41 / 42 / 43 | Phase UV / VW / WU Short | Excessive current was detected between two output terminals. |
| 48 | System Defaulted | The drive was commanded to write default values. |
| 55 | Ctrl Bd Overtemp | The main control board temperature sensor detected excessive heat. |
| 59 | Invalid Code | Internal error. |
| 61 / 62 | Shear Pin 1 / 2 | The programmed shear-pin torque level was exceeded. |
| 64 | Drive OverLoad | The drive overload count exceeded 100%. |
| 71–76 | Port 1–6 Adapter | The DPI communications option on that port has a fault. |
| 77 | IR Volts Range | The IR voltage drop calculated from motor nameplate data is out of range. |
| 78 | FluxAmpsRef Rang | Flux amps exceed the motor nameplate amps as calculated by autotune. |
| 79 | Excessive Load | The motor did not come up to speed in the allotted time during autotune. |
| 80 | AutoTune Aborted | The autotune function was cancelled or a fault occurred. |
| 81–86 | Port 1–6 DPI Loss | The DPI port stopped communicating. |
| 91 | Pri VelFdbk Loss | Feedback loss detected for the primary velocity feedback source. |
| 93 | Hw Enable Check | The hardware enable is jumpered out but indicates not enabled. |
| 94 | Alt VelFdbk Loss | Feedback loss detected for the alternate velocity feedback source. |
| 96 | PositionFdbkLoss | Feedback loss detected for the position feedback source. |
| 100 | Parameter Chksum | The parameter checksum read from non-volatile storage does not match. |
| 104 | Pwr Brd Checksum | The power board checksum does not match; data is set to default values. |
| 106 | Incompat MCB PB | The main control board did not recognize the power structure; flash newer firmware. |
| 107 | Replaced MCB PB | The main control board was moved to another power structure; data is set to defaults. |
| 108 | Anlg Cal Chksum | The analog calibration checksum does not match; a fault on the main control board. |
| 110 | Ivld Pwr Bd Data | Power structure data invalid; check the ribbon cable between the control and power interface boards. |
| 111 | PwrBd Invalid ID | Power structure ID invalid; check the ribbon cable between the control and power interface boards. |
| 112 | PwrBd App MinVer | The power structure needs a newer application firmware revision. |
| 124 | App ID Changed | Application firmware changed; verify the application revision. |
| 125 | Using Backup App | The application did not flash correctly; reflash. |
| 137 | Ext Prechrg Err | The seal contact on the external precharge contactor opened. |
| 138 | Precharge Open | The internal precharge contactor is open. |
| 141 | Autn Enc Angle | Encoderless angle compensation is out of range after autotune. |
| 142 | Autn Spd Rstrct | Frequency limit settings prevented a suitable autotune speed. |
| 143 | Autotune CurReg | Calculated current-regulator gains are out of range. |
| 144 | Autotune Inertia | Inertia test results are out of range. |
| 145 | Autotune Travel | The inertia test was prevented from reaching the required speed within the travel limit. |
| 152 | No Stop Source | The last stop source was removed. |
Where the manual's only remedy for a code is to replace the unit or module, the code is pointing at a hardware fault inside that part. Those are the faults NJT Automation repairs at component level, so a repair quote is usually the first thing to check before buying a replacement.
Source: Rockwell Automation publication 750-PM001, PowerFlex 750-Series AC Drives Programming Manual. Codes are listed as documented; fault behaviour can vary by firmware revision, so confirm against the manual for your unit's series.
Photos by NJT Automation; test videos from NJT or network repair technicians.
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