Fuji Electric frenic-hvac User manual

Instruction Manual
Thank you for purchasing our FRENIC-HVAC series of inverters.
• This product is designed to drive a three-phase induction motor. Read through this manual to become
familiar with the handling procedure and correct use.
• Improper handling might result in incorrect operation, short life cycle, or failure of this product as well as the
motor.
• Deliver this manual to the end user of this product. Keep this manual in a safe place until this product is
discarded.
• For instructions on how to use an optional device, refer to the instruction and installation manuals for that
optional device.
Fuji Electric Co., Ltd. INR-SI47-1610-E

Copyright © 2011 Fuji Electric Co., Ltd.
All rights reserved.
No part of this publication may be reproduced or copied without prior written permission from Fuji Electric Co., Ltd.
All products and company names mentioned in this manual are trademarks or registered trademarks of their
respective holders.
The information contained herein is subject to change without prior notice for improvement.

i
Preface
Thank you for purchasing our FRENIC-HVAC series of inverters. This product is designed to drive a three-phase
induction motor.
This instruction manual provides only minimum requisite information for wiring and operation of the product.
Read through this manual before use.
Related documentation
Listed below are the other materials related to the functions, specifications, wiring, configuration and
maintenance of this product. Contact your nearest service representative for these materials.
- FRENIC-HVAC User's Manual
These materials are subject to change without notice. Be sure to obtain the latest editions for use.
Safety precautions
Read this manual thoroughly before proceeding with installation, connections (wiring), operation, or maintenance
and inspection. Ensure you have sound knowledge of the device and familiarize yourself with all safety
information and precautions before proceeding to operate the inverter.
Safety precautions are classified into the following two categories in this manual.
Failure to heed the information indicated by this symbol may lead to
dangerous conditions, possibly resulting in death or serious bodily injuries.
Failure to heed the information indicated by this symbol may lead to
dangerous conditions, possibly resulting in minor or light bodily injuries
and/or substantial property damage.
Failure to heed the information contained under the CAUTION title can also result in serious consequences.
These safety precautions are of utmost importance and must be observed at all times.
Application
• This product is designed to drive a three-phase induction motor. Do not use it for single-phase motors or
for other purposes.
Fire or an accident could occur.
• This product may not be used for a life-support system or other purposes directly related to the human
safety.
• Though the product is manufactured under strict quality control, install safety devices for applications
where serious accidents or property damages are foreseen in relation to the failure of it.
An accident could occur.
Installation
• Install the inverter on a base made of metal or other non-flammable material.
Otherwise, a fire could occur.
• Do not place flammable object nearby.
Doing so could cause fire.

ii
• Do not support the inverter by its front cover during transportation.
Doing so could cause a drop of the inverter and injuries.
• Prevent lint, paper fibers, sawdust, dust, metallic chips, or other foreign materials from getting into the
inverter or from accumulating on the heat sink.
• When changing the positions of the top and bottom mounting bases, use only the specified screws.
Otherwise, a fire or an accident might result.
• Do not install or operate an inverter that is damaged or lacking parts.
Doing so could cause fire, an accident or injuries.
Wiring
• If no zero-phase current (earth leakage current) detective device such as a ground-fault relay is
installed in the upstream power supply line in order to avoid the entire power supply system's shutdown
undesirable to factory operation, install a residual-current-operated protective device (RCD)/earth
leakage circuit breaker (ELCB) individually to inverters to break the individual inverter power supply
lines only.
Otherwise, a fire could occur.
• When wiring the inverter to the power source, insert a recommended molded case circuit breaker
(MCCB) or residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB)
(with overcurrent protection) in the path of each pair of power lines to inverters. Use the recommended
devices within the recommended current capacity.
• Use wires in the specified size.
• Tighten terminals with specified torque.
Otherwise, a fire could occur.
• When there is more than one combination of an inverter and motor, do not use a multicore cable for the
purpose of handling their wirings together.
• Do not connect a surge killer to the inverter's output (secondary) circuit.
Doing so could cause a fire.
• Ground the inverter in compliance with the national or local electric code.
• Be sure to ground the inverter's grounding terminals G.
Otherwise, an electric shock or a fire could occur.
• Qualified electricians should carry out wiring.
• Be sure to perform wiring after turning the power OFF.
Otherwise, an electric shock could occur.
• Be sure to perform wiring after installing the inverter unit.
Otherwise, an electric shock or injuries could occur.
• Ensure that the number of input phases and the rated voltage of the product match the number of
phases and the voltage of the AC power supply to which the product is to be connected.
• When using this product in combination with a PWM converter, refer to the instructions given in the
User's Manual.
Otherwise, a fire or an accident could occur.
• Do not connect the power supply wires to the inverter output terminals (U, V, and W).
Doing so could cause fire or an accident.

iii
• In general, sheaths of the control signal wires are not specifically designed to withstand a high voltage
(i.e., reinforced insulation is not applied). Therefore, if a control signal wire comes into direct contact
with a live conductor of the main circuit, the insulation of the sheath might break down, which would
expose the signal wire to a high voltage of the main circuit. Make sure that the control signal wires will
not come into contact with live conductors of the main circuit.
Doing so could cause an accident or an electric shock.
• Before changing the switches, turn OFF the power and wait at least 10 minutes. Further, make sure,
using a multimeter or a similar instrument, that the DC link bus voltage between the terminals P(+) and
N(-) has dropped to the safe level (+25 VDC or below).
Otherwise, an electric shock could occur.
• The inverter, motor and wiring generate electric noise. Be careful about malfunction of the nearby
sensors and devices. To prevent them from malfunctioning, implement noise control measures.
Otherwise an accident could occur.
• The leakage current of the EMC filter built-in type of inverters is comparatively large. Be sure to perform
protective grounding.
Otherwise, an accident or an electric shock could occur.
Operation
• Be sure to mount the front cover before turning the power ON. Do not remove the cover when the
inverter power is ON.
Otherwise, an electric shock could occur.
• Do not operate switches with wet hands.
Doing so could cause electric shock.
• If the auto-reset function has been selected, the inverter may automatically restart and drive the motor
depending on the cause of tripping. Design the machinery or equipment so that human safety is
ensured at the time of restarting.
Otherwise, an accident could occur.
• If the stall prevention function (current limiter), automatic deceleration (anti-regenerative control), or
overload prevention control has been selected, the inverter may operate with acceleration/deceleration
or frequency different from the commanded ones. Design the machine so that safety is ensured even in
such cases.
• The key on the keypad is effective only when the keypad operation is enabled with function code
F02 (= 0, 2 or 3). When the keypad operation is disabled, prepare an emergency stop switch separately
for safe operations.
Switching the run command source from keypad (local) to external equipment (remote) by turning ON
the "Enable communications link" command LE disables the key. To enable the key for an
emergency stop, select the STOP key priority with function code H96 (= 1 or 3).
• If any of the protective functions have been activated, first remove the cause. Then, after checking that
the all run commands are set to OFF, release the alarm. If the alarm is released while any run
commands are set to ON, the inverter may supply the power to the motor, running the motor.
Otherwise, an accident could occur.

iv
• If you enable the "Restart mode after momentary power failure" (Function code F14 = 3 to 5), then the
inverter automatically restarts running the motor when the power is recovered.
Design the machinery or equipment so that human safety is ensured after restarting.
• If the user configures the function codes wrongly without completely understanding this Instruction
Manual and the FRENIC-HVAC User's Manual, the motor may rotate with a torque or at a speed not
permitted for the machine.
An accident or injuries could occur.
• Even if the inverter has interrupted power to the motor, if the voltage is applied to the main circuit input
terminals L1/R, L2/S and L3/T, voltage may be output to inverter output terminals U, V, and W.
• Even if the motor is stopped due to DC braking, voltage is output to inverter output terminals U, V, and
W.
An electric shock may occur.
• The inverter can easily accept high-speed operation. When changing the speed setting, carefully check
the specifications of motors or equipment beforehand.
Otherwise, injuries could occur.
• Do not touch the heat sink because it becomes very hot.
Doing so could cause burns.
• The DC brake function of the inverter does not provide any holding mechanism.
Injuries could occur.
• Ensure safety before modifying the function code settings.
Run commands (e.g., "Run forward" FWD,"Force to run" FMS), stop commands (e.g., "Coast to a stop"
BX), and frequency change commands can be assigned to digital input terminals. Depending upon the
assignment states of those terminals, modifying the function code setting may cause a sudden motor
start or an abrupt change in speed.
• When the inverter is controlled with the digital input signals, switching run or frequency command
sources with the related terminal commands (e.g., SS1, SS2, SS4, SS8, Hz2/Hz1, Hz/PID, IVS, LE and
FMS) may cause a sudden motor start or an abrupt change in speed.
• Ensure safety before modifying customizable logic related function code settings (U codes and related
function codes) or turning ON the "Cancel customizable logic" terminal command CLC. Depending
upon the settings, such modification or cancellation of the customizable logic may change the operation
sequence to cause a sudden motor start or an unexpected motor operation.
• If any abnormality is found in the inverter or motor, immediately stop it and perform troubleshooting,
referring to the User's Manual.
An accident or injuries could occur.

v
Maintenance and inspection, and parts replacement
• Before proceeding to maintenance or inspection, turn OFF the power and wait at least 10 minutes.
Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between the
terminals P(+) and N(-) has dropped to the safe level (+25 VDC or below).
Otherwise, an electric shock could occur.
• Maintenance, inspection, and parts replacement should be made only by qualified persons.
• Take off the watch, rings and other metallic objects before starting work.
• Use insulated tools.
Otherwise, an electric shock or injuries could occur.
• Never modify the inverter.
Doing so could cause an electric shock or injuries.
Disposal
• Treat the inverter as an industrial waste when disposing of it.
Otherwise injuries could occur.
GENERAL PRECAUTIONS
Drawings in this manual may be illustrated without covers or safety shields for explanation of detail parts.
Restore the covers and shields in the original state and observe the description in the manual before starting
operation.
Icons
The following icons are used throughout this manual.
This icon indicates information which, if not heeded, can result in the inverter not operating to full
efficiency, as well as information concerning incorrect operations and settings which can result in
accidents.
This icon indicates information that can prove handy when performing certain settings or operations.
(This icon indicates a reference to more detailed information.

vi
Conformity to the Low Voltage Directive in the EU
If installed according to the guidelines given below, inverters marked with CE are considered as compliant with
the Low Voltage Directive 2006/95/EC.
Compliance with European Standards
Adjustable speed electrical power drive systems (PDS).
Part 5-1: Safety requirements. Electrical, thermal and energy. EN61800-5-1: 2007
1. The ground terminal G should always be connected to the ground. Do not use only a
residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB)* as the sole
method of electric shock protection. Be sure to use ground wires of recommended size listed on page vii.
*With overcurrent protection.
2. To prevent the risk of hazardous accidents that could be caused by damage of the inverter, install the
specified fuses in the supply side (primary side) according to the following tables.
- Breaking capacity: Min. 10 kA
- Rated voltage: Min. 500 V
Power
supply
voltage
Nominal
applied
motor
(kW)
Inverter type Fuse rating
(A)
Three-
phase
400 V
0.75 FRN0.75AR1-4¸3 (IEC60269-1)
1.5 FRN1.5AR1-4¸6 (IEC60269-1)
2.2 FRN2.2AR1-4¸10 (IEC60269-1)
3.7
(4.0)*
FRN3.7AR1-4¸
FRN4.0AR1-4E 15 (IEC60269-1)
5.5 FRN5.5AR1-4¸20 (IEC60269-1)
7.5 FRN7.5AR1-4¸25 (IEC60269-1)
11 FRN11AR1-4¸35 (IEC60269-1)
15 FRN15AR1-4¸50 (IEC60269-1)
18.5 FRN18.5AR1-4¸60 (IEC60269-1)
22 FRN22AR1-4¸70 (IEC60269-1)
30 FRN30AR1-4¸100 (IEC60269-1)
37 FRN37AR1-4¸125 (IEC60269-1)
* 4.0 kW for the EU. The inverter type is FRN4.0AR1-4E.
Note: A box () replaces an alphabetic letter depending on the enclosure.
A box (¸) replaces an alphabetic letter depending on the shipping destination.
3. When used with the inverter, a molded case circuit breaker (MCCB), residual-current-operated protective
device (RCD)/earth leakage circuit breaker (ELCB) or magnetic contactor (MC) should conform to the EN
or IEC standards.
4. When you use a residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB)
for protection from electric shock in direct or indirect contact power lines or nodes, be sure to install type
Bof RCD/ELCB on the input (primary) of the inverter.
5. The IP20 or IP00 rated inverter should be used in an environment that does not exceed Pollution Degree
2 requirements. If the environment conforms to Pollution Degree 3 or 4, install the inverter in an enclosure
of IP54 or higher.
6. Install the inverter, AC reactor (ACR), input or output filter in an enclosure with minimum degree of
protection of IP2X (Top surface of enclosure shall be minimum IP4X when it can be easily accessed), to
prevent human body from touching directly to live parts of these equipment.
7. Do not connect any copper wire directly to grounding terminals. Use crimp terminals with tin or equivalent
plating to connect them.
8. When you use an inverter at an altitude of more than 2000 m, you should apply basic insulation for the
control circuits of the inverter. The inverter cannot be used at altitudes of more than 3000 m.

vii
Conformity to the Low Voltage Directive in the EU (Continued)
9. Use wires listed in EN60204 Appendix C.
Power supply voltage
Nominal applied motor
Inverter type
MCCB or
RCD/ELCB
*1
Rated
current
Recommended wire size (mm2)
Main terminal
Control
circuit
Aux.
control
power
supply
[R0, T0]
Main power input Inverter
outputs
[U, V, W]
*2
[L1/R, L2/S,
L3/T]
*2
Inverter’s
grounding
[G]
Three-phase 400 V
0.75 FRN0.75AR1-4¸5
2.5
10
2.5
0.75 2.5
1.5 FRN1.5AR1-4¸
2.2 FRN2.2AR1-4¸
10
3.7
(4.0)*
FRN3.7AR1-4¸
FRN4.0AR1-4E
5.5 FRN5.5AR1-4¸15
7.5 FRN7.5AR1-4¸20
11 FRN11AR1-4¸30 4
15 FRN15AR1-4¸40 4 6
18.5 FRN18.5AR1-4¸50 6 10
22 FRN22AR1-4¸10
30 FRN30AR1-4¸75 16 16
37 FRN37AR1-4¸100 25 25
* 4.0 kW for the EU. The inverter type is FRN4.0AR1-4E.
Note: A box () replaces an alphabetic letter depending on the enclosure.
A box (¸) replaces an alphabetic letter depending on the shipping destination.
*1 The frame size and model of the MCCB or RCD/ELCB (with overcurrent protection) will vary, depending on the
power transformer capacity. Refer to the User's Manual for details.
*2 The recommended wire size for main circuits is for the 70°C 600 V PVC wires used at a surrounding temperature
of 40°C.
10. The inverter has been tested with IEC61800-5-1 2007 short-circuit test under the following conditions.
Short-circuit current in the supply: 10,000 A
Maximum 480 V

viii
Conformity with UL standards and CSA standards (cUL-listed for Canada)
UL/cUL-listed inverters are subject to the regulations set forth by the UL standards and CSA standards
(cUL-listed for Canada) by installation within precautions listed below.
1. Solid state motor overload protection (motor protection by electronic thermal overload relay) is provided in
each model.
Use function codes F10 to F12 to set the protection level.
2. Use Cu wire only.
3. Use Class 1 wire only for control circuits.
4. Short circuit rating
"Suitable For Use On A Circuit Of Delivering Not More Than 100,000 rms Symmetrical Amperes, 480
Volts Maximum when protected by Class J Fuses or a Circuit Breaker having an interrupting rating not
less than 100,000 rms Symmetrical Amperes, 480 Volts Maximum.
"Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit
protection must be provided in accordance with the National Electrical Code and any additional local
codes."
5. Field wiring connections must be made by a UL Listed and CSA Certified closed-loop terminal connector
sized for the wire gauge involved. Connector must be fixed using the crimp tool specified by the connector
manufacturer.
6. All circuits with terminals L1/R, L2/S, L3/T, R0, T0 must have a common disconnect and be connected to
the same pole of the disconnect if the terminals are connected to the power supply.

ix
Conformity with UL standards and CSA standards (cUL-listed for Canada) (continued)
7. Install UL certified fuses or circuit breaker between the power supply and the inverter, referring to the table
below.
Power supply voltage
Nominal applied motor
Inverter type
Class J fuse size
Circuit breaker trip size
Required torque
lb-in (N•m)
Main terminal Control circuit Aux. control
power supply
Three-phase 400V
0.75 FRN0.75AR1-4¸3
5
15.9
(1.8)
6.1
(0.7)
10.6
(1.2)
1.5 FRN1.5AR1-4¸6
2.2 FRN2.2AR1-4¸10
10
3.7
(4.0)*
FRN3.7AR1-4¸
FRN4.0AR1-4E 15
5.5 FRN5.5AR1-4¸20 15
7.5 FRN7.5AR1-4¸25 20
11 FRN11AR1-4¸35 30
51.3
(5.8)
15 FRN15AR1-4¸50 40
18.5 FRN18.5AR1-4¸60
50
22 FRN22AR1-4¸70
30 FRN30AR1-4¸100 75 51.3
(5.8)
37 FRN37AR1-4¸125 100
* 4.0 kW for the EU. The inverter type is FRN4.0AR1-4E.
Note: A box () replaces an alphabetic letter depending on the enclosure.
A box (¸) replaces an alphabetic letter depending on the shipping destination.

x
Conformity with UL standards and CSA standards (cUL-listed for Canada) (continued)
Power supply voltage
Nominal applied
motor
Inverter type
Wire size AWG (mm2)
Main terminal
Control circuit
Aux. control power
supply
L1/R，L2/S，L3/T *1U，V，W *1
75°C
Cu
wire
75°C
Cu
wire
Three-phase 400V
0.75 FRN0.75AR1-4¸
14
(2.1)
14
(2.1)
18
(0.8)
14
(2.1)
*1
1.5 FRN1.5AR1-4¸
2.2 FRN2.2AR1-4¸
3.7
(4.0) *
FRN3.7AR1-4¸
FRN4.0AR1-4E
5.5 FRN5.5AR1-4¸
7.5 FRN7.5AR1-4¸12
(3.3)
11 FRN11AR1-4¸12
(3.3)
10
(5.3)
15 FRN15AR1-4¸10
(5.3) 8
(8.4)
18.5 FRN18.5AR1-4¸8
(8.4)
22 FRN22AR1-4¸
30 FRN30AR1-4¸6
(13.3)
6
(13.3)
37 FRN37AR1-4¸4
(21.2)
2
(33.6)
* 4.0 kW for the EU. The inverter type is FRN4.0AR1-4E.
Note: A box () replaces an alphabetic letter depending on the enclosure.
A box (¸) replaces an alphabetic letter depending on the shipping destination.
*1 No terminal end treatment is required for connection.

xi
Table of Contents
Preface ............................................................................i
Safety precautions .............................................................i
Chapter 1 BEFORE USE.................................................1-1
1.1 Acceptance Inspection and Appearance of
Product...................................................................1-1
Chapter 2 MOUNTING AND WIRING THE INVERTER...2-1
2.1 Installing the Inverter ..............................................2-1
2.2 Wiring .....................................................................2-2
2.2.1 Removing and mounting the front cover
and the wiring plate........................................2-2
2.2.2 Recommended wire sizes..............................2-3
2.2.3 Terminal arrangement diagrams and screw
specifications .................................................2-3
2.2.4 Terminal functions and wiring order ...............2-5
2.2.5 Connection diagrams.....................................2-7
2.2.6 Setting up the slide switches........................2-10
Chapter 3 NAMES AND FUNCTIONS OF KEYPAD
COMPONENTS ..............................................3-1
Chapter 4 RUNNING THE MOTOR FOR A TEST ...........4-1
4.1 Checking Prior to Powering ON..............................4-1
4.2 Powering ON and Checking ...................................4-1
4.3 Configuring the Function Code Data Before
Test Run .................................................................4-2
4.4 Running the Inverter for Motor Operation Check....4-2
4.5 Preparation for Practical Operation ........................4-2
Chapter 5 TROUBLESHOOTING....................................5-1
5.1 Alarm Codes...........................................................5-1
Chapter 6 MAINTENANCE AND INSPECTION...............6-1
6.1 Daily Inspection ......................................................6-1
6.2 Periodic Inspection .................................................6-1
6.3 List of Periodic Replacement Parts ........................6-3
6.4 Inquiries about Product and Guarantee..................6-3
6.4.1 When making an inquiry ................................6-3
6.4.2 Product warranty............................................6-3
Chapter 7 SPECIFICATIONS ..........................................7-1
7.1 Standard Model ......................................................7-1
7.2 External Dimensions ..............................................7-2
Chapter 8 CONFORMITY WITH STANDARDS ...............8-1
8.1 Compliance with European Standards ...................8-1
8.2 Conformity to the Lower Voltage Directive
in the EU.................................................................8-1
8.3 Compliance with EMC Standards...........................8-1
8.3.1 General..........................................................8-1
8.3.2 Recommended installation procedure ...........8-1
8.3.3 Leakage current of the EMC filter ..................8-2
8.4 Harmonic Component Regulation in the EU...........8-3
8.4.1 General comments ........................................8-3
8.4.2 Compliance with EN61000-3-2 ......................8-3
8.4.3 Compliance with EN61000-3-12 ....................8-3
8.5 Compliance with UL Standards and Canadian
Standards (cUL certification)...................................8-3
8.5.1 General comments ........................................8-3
8.5.2 Considerations when using FRENIC-HVAC
in systems to be certified by UL and cUL.......8-3

xii

1-1
Chapter 1 BEFORE USE
1.1 Acceptance Inspection and Appearance of Product
Unpack the package and check the following:
(1) An inverter and instruction manual (this book) are contained in the package.
(2) The inverter has not been damaged during transportation—there should be no dents or parts missing.
(3) The inverter is the type you ordered. You can check the type and specifications on the main nameplate. (A
total of four nameplates and warning plates are attached to the inverter as shown below.)
In this manual, inverter types are denoted as "FRN_ _ _AR1-4¸." The boxes and ¸replace
alphabetic letters depending on the enclosure and shipping destination, respectively.
If you suspect the product is not working properly or if you have any questions about your product, contact your
Fuji Electric representative.
Main nameplate
Sub nameplate
High temperature warning plate
Warning plate
Product number
Inverter type
Input power
specifications
Short-circuit capacity
Mass of the inverter
Production year and week
Inverter output
specifications
Enclosure
0 39
Production week:
The 1st week of January is
indicated as "01."
Production year: Last digit of year

2-1
Chapter 2 MOUNTING AND WIRING THE INVERTER
2.1 Installing the Inverter
(1) Mounting base
Install the inverter on a base made of metal or other non-flammable
material. Do not mount the inverter upside down or horizontally.
(2) Clearances
Ensure that the minimum clearances indicated in Figure 2.1 and Table
2.1 are maintained at all times. When installing the inverter in the panel
of your system, take extra care with ventilation inside the panel as the
surrounding temperature easily rises. Do not install the inverter in a
small panel with poor ventilation.
When mounting two or more inverters
When mounting two or more inverters in the same unit or panel,
basically lay them out side by side. When mounting them necessaril
y
one above the other, be sure to separate them with a partition plate o
r
the like so that any heat radiating from an inverter will not affect the
one(s) above.
Table 2.1 Clearances (mm)
Inverter capacity A B C
0.75 to 37 kW 10 100 100
C: Space required in front of the inverter unit
Figure 2.1 Mounting Direction and
Required Clearances

2-2
2.2 Wiring
Before wiring, remove the front cover and wiring plate and then set cable glands or conduits on the wiring plate.
After wiring, mount the wiring plate and front cover back into place. (The cable glands or conduits should be
prepared by the customer.)
2.2.1 Removing and mounting the front cover and the wiring plate
(1) Removing the front cover and the wiring plate
Loosen the (four or six) screws on the front cover, hold the right and left ends of the front cover, and remove
it towards you.
Loosen the four screws on the wiring plate, hold the right and left ends of the wiring plate, and remove it
downwards.
Figure 2.2 Removing the Front Cover and the Wiring Plate (FRN37AR1M-4¸)
- The wiring plate can be removed even with the front cover being mounted.
- To expose the control printed circuit board (control PCB), remove the front cover.
(2) Punching out semi-perforated sections in the wiring plate and setting cable glands or conduits
Lightly tap the semi-perforated sections from the inside of the wiring plate using the hand grip of a
screwdriver or the like to punch them out.
Set the cable glands or conduits on the wiring plate and then carry out wiring.
Take care not to get injured by the edge of the parts.
Figure 2.3 Punching Out Semi-perforated Sections in the Wiring Plate and Setting Cable Glands or Conduits
(3) Mounting the wiring plate and the front cover
After wiring, mount the wiring plate and front cover back into place. (Tightening torque: 1.8 N•m (M4))

2-3
2.2.2 Recommended wire sizes
For the recommended wire sizes for the main circuits, refer to the "Conformity to the Low Voltage Directive in
the EU" and "Conformity with UL standards and CSA standards (cUL-listed for Canada)" given in Preface.
2.2.3 Terminal arrangement diagrams and screw specifications
The tables and figures given below show the screw specifications and terminal arrangement diagrams. Note
that the terminal arrangements differ depending on the inverter capacity.
Do not make wiring to empty main circuit terminals marked with (NC) in the figures given below. Doing
so may break the inverter.
(1) Main circuit terminals
Table 2.2 Main Circuit Terminals
Power
supply
voltage
Nominal
applied
motor
(kW)
Inverter type Refer to:
Main circuit
terminals Grounding terminals Aux. control power supply
Screw
size
Tightening
torque
(N·m)
Screw
size
Tightening
torque
(N·m)
Screw
size
Tightening
torque
(N·m)
Three-
phase
400V
0.75 FRN0.75AR1-4¸
Figure A M4 15.9
(1.8) M4 15.9
(1.8)
M3.5 10.6
(1.2)
1.5 FRN1.5AR1-4¸
2.2 FRN2.2AR1-4¸
3.7
(4.0)*
FRN3.7AR1-4¸
FRN4.0AR1-4E
5.5 FRN5.5AR1-4¸
7.5 FRN7.5AR1-4¸
11 FRN11AR1-4¸
Figure B M6 51.3
(5.8) M6 51.3 (5.8)
15 FRN15AR1-4¸
18.5 FRN18.5AR1-4¸
22 FRN22AR1-4¸
30 FRN30AR1-4¸Figure C M6 51.3
(5.8) M6 51.3 (5.8)
37 FRN37AR1-4¸
* 4.0 kW for the EU. The inverter type is FRN4.0AR1-4E.
Note: A box () replaces an alphabetic letter depending on the enclosure.
A box (¸) replaces an alphabetic letter depending on the shipping destination.
Figure A
Figure B
Figure C
(NC): No connection

2-4
(2) Arrangement of control circuit terminals
Screw type of terminal block
(common to all inverter types)
Europe type of terminal block
(common to all inverter types)
Table 2.3 Control Circuit Terminals
Terminal
block type
Screw specifications
Recommended
wire size (mm2)
Type of screwdriver
(tip shape)
Wire strip length
Gauge No. of wire
insertion slot
Screw
size
Tightening
torque
Screw type
M3
0.7 N·m
0.75 mm2
- - -
Europe
type 0.5 to 0.6 N·m Flat screwdriver (0.6 mm x 3.5 mm) 6 mm A1*
*In conformity with the IEC60947-7-1

2-5
2.2.4 Terminal functions and wiring order
Main circuit terminals and grounding terminals
The table below shows the order of wiring and terminal functions. Carry out wiring in the order shown below.
Table 2.4 Order of Wiring and Functions of Main Circuit Terminals
Classifi-
cation
Order of
wiring Name Symbol Functions
Main
circuit
(Note)
1
Primary grounding
terminals for inverter
enclosure
G
Two grounding terminals ( G) are not exclusive to the
power supply wiring (primary circuit) or motor wiring
(secondary circuit). Be sure to ground either of the two
grounding terminals for safety and noise reduction.
2
Secondary grounding
terminals for motor G Connect the secondary grounding wire to the grounding
terminal ( G).
Inverter output terminals U, V, W Connect the three wires of the 3-phase motor to terminals
U, V, and W, aligning the phases each other. (*1)
3DC link bus terminals P(+), N(-)
A DC link bus is connectable to these terminals.
When you need to use the DC link bus terminals P(+) and
N(-), consult your Fuji Electric representative.
4Main circuit power input
terminals
L1/R, L2/S,
L3/T
The three-phase input power lines are connected to these
terminals. (*2)
If the power wires are connected to other terminals, the
inverter will be damaged when the power is turned ON.
5Auxiliary control power
input terminals R0, T0 Connect the same AC power as for the main circuit to these terminals as a control circuit power backup.
Control
circuit 6Control circuit terminals See Table 2.5.
Route the wiring of the control circuit as far from that of the
main circuit as possible. Otherwise, electric noise may
cause malfunctions.
When the Enable function is not to be used, short-circuit
terminals [EN1] and [PLC] and terminals [EN2] and [PLC]
using jumper wires.
(Note) Do not make wiring to empty main circuit terminals (NC). For details about the terminal block, refer to
Section 2.2.3 "Terminal arrangement diagrams and screw specifications."
To make the machinery or equipment compliant with the EMC standards, wire the motor and inverter in
accordance with the following.
(*1) Use shielded wires for the motor cable and route the cable as short as possible. Firmly clamp the shield to the
specified point inside the inverter.
(*2) When wiring the main circuit power input lines of the inverters of 11 to 37 kW, be sure to pass them through a ferrite
core.
When shielded wires are not used for the motor cable, remove the motor cable clamps to prevent the
cable covering from getting damaged, which makes the machinery or equipment incompliant with the
EMC standards. Removing a ferrite core from the input lines in wiring does not affect inverter running.
(For details about wiring, refer to Chapter 8, Section 8.3 "Compliance with EMC Standards."
Control circuit terminals
Table 2.5 Names, Symbols and Functions of the Control Circuit Terminals
Classifi-
cation Name Symbol Functions
Analog
input
Power supply for the
potentiometer
[13] Power supply for an external frequency command potentiometer
(Variable resistor: 1 to 5kΩ)
Analog setting voltage input [12] External voltage input that commands the frequency externally.
Analog setting current input
PTC thermistor input
[C1] External current input that commands the frequency externally.
Connection of a PTC (Positive Temperature Coefficient) thermistor
for motor protection.
Analog setting voltage input [V2] External voltage input that commands the frequency externally.
Analog common [11] Common terminal for analog input signals.