1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the Allen Bradley PowerFlex 70 AC Drive, model 20AD8P0A3AYNNNC0. The PowerFlex 70 is a variable frequency drive designed for controlling the speed and torque of AC induction motors in various industrial applications. Please read this manual thoroughly before attempting to install or operate the drive.
Figure 1: Front view of the Allen Bradley PowerFlex 70 AC Drive, showing the control panel and display.
2. Safety Information
WARNING: Electrical shock hazard. Only qualified personnel should install, operate, and maintain this equipment. Failure to observe safety precautions can result in severe injury or death.
- Always disconnect and lock out/tag out all power sources before working on the drive or connected equipment.
- Ensure proper grounding of the drive and motor.
- Do not touch electrical components or terminals when power is applied.
- Verify that the input voltage matches the drive's rated voltage.
- Protect the drive from moisture, dust, and corrosive environments.
3. Setup and Installation
3.1 Mounting
Mount the drive vertically on a flat, stable surface. Ensure adequate clearance for ventilation above and below the unit to prevent overheating. Refer to the drive's dimensions for proper spacing.
3.2 Wiring
All wiring must comply with local electrical codes and standards. Use appropriate wire gauges for power and control connections. Connect input power to the L1, L2, L3 terminals and the motor to the T1, T2, T3 terminals. Ensure proper grounding to the PE terminal.
3.3 Initial Power-Up
Before applying power, double-check all wiring connections. Once power is applied, observe the drive's display for any fault codes. The drive should power up and display its default operating screen or a status indicator.
Figure 2: Angled view of the PowerFlex 70 drive, illustrating the side panel which often contains ventilation grilles for heat dissipation.
4. Operating Instructions
4.1 Control Panel Overview
The drive features an integral keypad and display for local control and parameter programming. Key buttons include:
- ESC: Exits the current menu or cancels an entry.
- SEL: Selects a parameter or confirms an entry.
- Up/Down Arrows: Navigate through menus or adjust parameter values.
- JOG: Initiates a jog operation for motor testing.
- ALT: Accesses alternate functions or parameter groups.
4.2 Basic Operation
To start the motor, ensure the drive is in run mode and press the appropriate start command (either via the keypad or external control input). The display will show the motor's operating frequency or speed. To stop, issue a stop command. Refer to the drive's programming manual for detailed parameter settings and advanced control options.
5. Maintenance
Regular maintenance ensures optimal performance and extends the life of your PowerFlex 70 drive.
- Inspection: Periodically inspect the drive for dust accumulation, loose connections, or signs of damage.
- Cleaning: Keep the drive's ventilation openings clear of obstructions. Use compressed air to remove dust from heat sinks and internal components. Ensure power is disconnected before cleaning.
- Fan Replacement: Cooling fans have a finite lifespan. Monitor fan operation and replace them if they become noisy or stop functioning.
6. Troubleshooting
This section provides guidance for common issues. For detailed fault codes and solutions, consult the comprehensive PowerFlex 70 user manual from Allen-Bradley.
| Problem | Possible Cause | Solution |
|---|---|---|
| Drive does not power on | No input power; Blown fuse/breaker | Check power supply; Verify fuses/breakers. |
| Motor does not run | No run command; Fault condition; Incorrect parameters | Verify run command; Check for fault codes; Review motor parameters. |
| Overcurrent fault | Motor overload; Short circuit; Rapid acceleration | Reduce load; Check motor/cables; Increase acceleration time. |
| Overvoltage fault | High input voltage; Rapid deceleration | Check input voltage; Increase deceleration time; Add braking resistor if needed. |
7. Specifications
The following specifications apply to the Allen Bradley PowerFlex 70 AC Drive, model 20AD8P0A3AYNNNC0:
Figure 3: Product label displaying detailed electrical and power specifications for the drive.
- Model Number: 20AD8P0A3AYNNNC0
- Manufacturer: Allen Bradley
- Series: A
- Normal Duty Power: 4 kW
- Heavy Duty Power: 5 HP (4 kW)
- Input: 3 Phase, 47 - 63 Hz
- AC Voltage Range (480V Class): 432 - 528V
- Input Amps: 9.8 A
- Output: 3 Phase, 0 - 400 Hz
- Continuous Amps: 8 A
- Base Frequency (default): 60 Hz
- Package Dimensions: 18 x 18 x 12 inches
- Date First Available: March 13, 2014
