Fuji Mini VFD Manual

The Fuji Mini VFD is a compact variable frequency drive designed for small motor applications, featuring digital control, multiple operating modes, built-in protection functions, keypad operation, analog/digital inputs, relay outputs, and adjustable frequency range. Rated for 230V AC single-phase input, 3-phase output. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operating Modes 8. Protection Features 9. Maintenance & Care 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital control panel, Terminal blocks for power and control, Cooling fan, LED status indicators, Potentiometer for speed adjustment.

Feature	Description
Power terminals	For single-phase input and three-phase motor output
Control terminals	For start/stop control, speed reference, relay outputs
Digital keypad	For parameter setting and operation control
LED indicators	Power, run, fault status display
Cooling fan	For heat dissipation during operation
Potentiometer	Manual speed adjustment (0-10V)
RUN/STOP	Starts and stops motor operation
PROG/ESC	Enters programming mode or exits
UP/DOWN	Navigates parameters and adjusts values
RESET	Clears fault conditions

Installation

Unpack and inspect contents. Mount in suitable enclosure.

Mounting: Secure to flat surface using provided mounting holes.
Power wiring: Connect L1, L2 for single-phase input; U, V, W for motor output.
Control wiring: Connect start/stop signals, speed reference inputs.
Grounding: Ensure proper grounding for safety and noise reduction.

WARNING! Disconnect power before installation. Ensure proper ventilation for cooling.

First-Time Setup

Apply power; initialize basic parameters.

Motor data setup: Enter motor rated voltage, current, and frequency.
Operating mode: Select V/F control or sensorless vector control.
Acceleration/deceleration: Set ramp times according to application.
Frequency limits: Set minimum and maximum operating frequencies.

CAUTION! Verify motor parameters before operation to prevent damage.

Specifications

Input Power: 230V AC single-phase, 50/60Hz
Output Power: 0.4kW to 2.2kW (depending on model)
Output Frequency: 0-400Hz adjustable
Control Methods: V/F control, sensorless vector control
Protection Features: Overcurrent, overload, overvoltage, undervoltage, overtemperature
Digital Inputs: 3 programmable digital inputs
Analog Inputs: 1x 0-10V, 1x 4-20mA
Relay Outputs: 1 programmable relay output
Operating Temperature: -10°C to 50°C
Enclosure: IP20 (finger-safe)

Controls and Settings

Access parameters via keypad or external controls. Front Panel: RUN/STOP, PROG/ESC, UP/DOWN, RESET.

Keypad Functions: RUN/STOP, Parameter navigation, Value adjustment, Fault reset.

Basic Parameters: Acceleration time (P01), Deceleration time (P02), Maximum frequency (P03), Base frequency (P04). Motor Parameters: Rated voltage (P05), Rated current (P06), Number of poles (P07). Control Parameters: Operating mode selection (P08), Stop method (P09).

Connecting Devices

Power: L1, L2 input; U, V, W motor output. Control: Digital inputs, analog inputs, relay outputs.

Disconnect all power before wiring.
Connect motor wires to U, V, W terminals.
Wire control signals according to application requirements.
Connect ground wire to chassis ground terminal.

Tip: Use shielded cables for control wiring to reduce noise interference.

Operating Modes

Supports V/F control and sensorless vector control.

Keypad operation: Use RUN/STOP and speed potentiometer.
External control: Use digital inputs for remote operation.
Multi-speed operation: Program up to 7 preset speeds.
PID control: For process control applications.
Jog operation: For precise positioning.
DC braking: For quick stopping.
Auto restart: Automatic restart after power recovery.
Frequency jump: Avoid mechanical resonance frequencies.

WARNING! Do not change parameters while motor is running unless necessary.

Protection Features

Overcurrent Protection: Trips at 150% of rated current for 1 minute. Overload Protection: Electronic thermal protection based on motor current. Overvoltage/Undervoltage: Protects against power supply variations. Overtemperature: Monitors internal temperature and reduces output if overheating.

Maintenance & Care

Disconnect power before maintenance. Clean exterior with dry cloth; check terminal tightness periodically.

CAUTION! Do not use compressed air for cleaning as it may drive dust inside the unit.

Regulatory Information

CE Compliant: Meets European EMC and low voltage directives. UL Recognized: Component recognition for North America. RoHS Compliant: Free of hazardous substances. Copyright © 2024 Fuji Electric; all rights reserved. For technical support, visit www.fujielectric.com or contact 1-800-555-1234.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display on keypad	Power supply	Check input voltage; verify power connections.
Motor not running	Control wiring/parameters	Check start signal; verify run command source.
Overcurrent fault	Motor/load issues	Check for motor short; reduce load; increase acceleration time.
Overvoltage fault	Regeneration/braking	Increase deceleration time; add braking resistor if needed.
Overtemperature	Cooling/ambient temperature	Ensure adequate ventilation; clean cooling fins.

Reset: Press RESET button after fault condition is cleared.

Service: 1-800-555-1234; www.fujielectric.com