Fuji Electric VFD Manual

The Fuji Electric VFD (Variable Frequency Drive) is an advanced motor control device designed for precise speed regulation and energy efficiency. This manual covers the FRENIC-Mini series and other Fuji VFD models, providing comprehensive guidance on installation, programming, operation, maintenance, and troubleshooting of these industrial-grade frequency converters.

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

Features at a Glance

Key components: Digital operator, Control terminals, Main circuit terminals, Cooling fan, Heat sink, LED indicators.

Feature	Description
Control Method	Sine wave PWM control
Frequency Range	0.1 to 400 Hz
Input Voltage	200-240V AC, 380-480V AC (depending on model)
Digital Operator	LCD display with function keys
Control Terminals	For start/stop, speed reference, monitoring
Main Circuit Terminals	Power input and motor output connections
Braking Transistor	Built-in for dynamic braking
Communication	RS-485, Modbus RTU protocol
Protection Functions	Overcurrent, overvoltage, motor overload
Programming	Multiple function codes for customization

Installation

Unpack and inspect contents. Mount in appropriate enclosure.

Mounting: Install in vertical position with proper clearance for ventilation.
Power wiring: Connect main circuit terminals R/L1, S/L2, T/L3 for input; U, V, W for motor output.
Control wiring: Connect control terminals for start/stop, speed reference, and monitoring signals.
Grounding: Ensure proper grounding of drive and motor.
Apply power: Verify correct voltage before energizing.

WARNING! High voltage present - disconnect power before installation. Ensure proper grounding to prevent electric shock.

First-Time Setup

Power on VFD; initialize parameters for your application.

Motor data setup: Enter motor rated current, voltage, and frequency.
Basic operation: Set acceleration/deceleration times and maximum frequency.
Control method: Select keypad, terminal, or communication control.
Protection settings: Configure overload, overcurrent, and other protection parameters.
Test run: Verify proper motor rotation and operation.

CAUTION! Always perform test run at low speed first. Ensure motor can rotate freely.

Specifications

Model Series: FRENIC-Mini, FRENIC-Multi, FRENIC-HVAC
Power Range: 0.1 kW to 630 kW (depending on model)
Input Voltage: Single-phase 200-240V, Three-phase 200-240V/380-480V
Output Frequency: 0.1 to 400 Hz
Control Method: Sine wave PWM, V/F control, vector control
Carrier Frequency: 0.5 to 16 kHz (adjustable)
Efficiency: >97% at rated load
Protection Degree: IP20 (standard), IP54/55 (optional)
Ambient Temperature: -10°C to +50°C (14°F to 122°F)
Storage Temperature: -20°C to +65°C (-4°F to 149°F)

Controls and Settings

Access parameters via digital operator. Front Panel: RUN, STOP, MODE, UP, DOWN, ESC, DATA/ENTER.

Digital Operator: LCD display shows frequency, current, status, and fault codes. Function keys for navigation and parameter setting.

Basic Parameters: Acceleration time (F001), Deceleration time (F002), Maximum frequency (F003), Base frequency (F004). Motor Parameters: Rated current (P002), Rated slip (P003). Control Parameters: Operation method (F001), Frequency setting (F002). Protection Parameters: Electronic thermal (P009), Overcurrent (P010).

Connecting Devices

Main circuit: Power input and motor output. Control circuit: Digital inputs, analog inputs, relay outputs.

Disconnect all power before wiring.
Main circuit: Connect 3-phase power to R/L1, S/L2, T/L3; motor to U, V, W.
Control terminals: Connect start/stop signals to FWD, REV, COM.
Speed reference: Connect 0-10V or 4-20mA signal to analog input terminals.
Monitoring: Connect relay outputs for fault, running, or frequency arrival signals.

Tip: Use shielded cables for control wiring and maintain proper separation from power cables.

Operation Modes

Supports multiple control modes for various applications.

Keypad operation: Use digital operator for start/stop and speed control.
External terminal control: Use external switches and potentiometer.
Communication control: Modbus RTU via RS-485.
Multi-step speed: Pre-set 15 different speeds.
PID control: For process control applications.
Jog operation: For positioning and setup.
DC braking: For quick stopping.
Energy saving: Automatic voltage optimization.

WARNING! Do not operate beyond specified limits. Monitor motor temperature during extended operation.

Protection Features

Overcurrent protection (OC), Overvoltage protection (OV), Motor overload protection (OL1), Drive overload protection (OL2), Ground fault protection (GF), Heat sink overheat protection (OH), Input phase loss, Output phase loss, Undervoltage protection (UV).

Maintenance & Care

Regular inspection and maintenance ensure long service life.

Daily: Check for abnormal noise, vibration, or overheating.
Monthly: Clean air vents and check connections.
Quarterly: Check and retighten terminal screws.
Annually: Measure DC bus voltage, check cooling fan operation.
Every 2-5 years: Replace cooling fan and electrolytic capacitors.

CAUTION! Always disconnect power before maintenance. Discharge DC bus capacitors before working on drive.

Regulatory Information

CE compliant: Meets European EMC and low voltage directives. UL/cUL listed: Complies with UL 508C standard. RoHS compliant: Meets restriction of hazardous substances requirements. Copyright © Fuji Electric Co., Ltd. All rights reserved. For technical support, visit www.fujielectric.com or contact your local Fuji Electric distributor.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Drive does not start	No run command/power	Check run signal; verify power supply; check emergency stop circuit.
Motor does not rotate	Wiring/frequency setting	Check motor connections; verify output frequency setting; check load.
Overcurrent fault (OC)	Acceleration too short/overload	Increase acceleration time; reduce load; check for motor ground fault.
Overvoltage fault (OV)	Deceleration too short/regeneration	Increase deceleration time; add braking resistor; check input voltage.
Overheat fault (OH)	High ambient/cooling blocked	Improve ventilation; clean air vents; check fan operation.
Undervoltage fault (UV)	Power loss/low voltage	Check input power; verify voltage level; check main circuit fuses.

Reset: Press STOP/RESET key or cycle power after correcting fault cause.

Service: Contact Fuji Electric technical support or authorized service center.