Nissei VF-nC3M User Manual

ＮＩＳＳＥＩ ＣＯＲＰＯＲＡＴＩＯＮ E6581815
N-2
14
■ Check points
1. Something unusual in the installation environment
2. Something unusual in the cooling system
3. Unusual vibration or noise
4. Overheating or discoloration
5. Unusual odor
6. Unusual motor vibration, noise or overheating
7. Adhesion or accumulation of foreign substances (conductive substances)
14.2 Periodical inspection
Make a periodical inspection at intervals of 3 or 6 months depending on the operating conditions.
Warning
Mandatory
action
 Before inspection, perform the following steps.
(1) Shut off all input power to the inverter.
(2) Wait at least 15 minutes and check to make sure that the charge lamp is no longer lit.
(3) Use a tester that can measure DC voltages (400V DC or more), and check that the voltage to the
DC main circuits (across PA-PC) does not exceed 45V.
Performing an inspection without carrying out these steps first could lead to electric shock.
Prohibited
 Never replace any part.
This could be a cause of electric shock, fire and bodily injury. To replace parts, call our company.
■ Check items
1. Check to see if all screwed terminals are tightened firmly. If any screw is found loose, tighten it again
with a screwdriver.
2. Check to see if all caulked terminals are fixed properly. Check them visually to see that there is no trace
of overheating around any of them.
3. Check all cables and wires for damage. Check them visually.
4. Remove dirt and dust. With a vacuum cleaner, remove dirt and dust. When cleaning, clean the vents
and the printed circuit boards. Always keep them clean to prevent an accident due to dirt or dust.
5. If no power is supplied to the inverter for a long time, the performance of its large-capacity electrolytic
capacitor declines.
When leaving the inverter unused for a long time, supply it with electricity once every two years, for 5
hours or more each, to recover the performance of the large-capacity electrolytic capacitor. And also
check the function of the inverter. It is advisable not to supply the commercial power directly to the
inverter but to gradually increase the power supply voltage with a transformer, etc.
6. If the need arises, conduct an insulation test on the main circuit terminal board only, using a 500V
insulation tester. Never conduct an insulation test on control terminals other than terminals on the
printed circuit board or on control terminals. When testing the motor for insulation performance, separate
it from the inverter in advance by disconnecting the cables from the inverter output terminals U/T1, V/T2
and W/T3. When conducting an insulation test on peripheral circuits other than the motor circuit,
disconnect all cables from the inverter so that no voltage is applied to the inverter during the test.

Nissei VF-nC3M Specifications

General

Brand	Nissei
Model	VF-nC3M
Category	Inverter
Language	English

Summary

Safety Precautions

Explanation of Markings

Details the meaning of warning and caution markings used in the manual and on the inverter.

Meanings of Symbols

General Operation Warnings

Covers critical warnings related to disassembly, prohibited actions, and mandatory operations.

Cautionary Measures

Details cautions for contact, mandatory actions, and transportation & installation.

Wiring Safety

Provides essential safety warnings and mandatory actions for electrical wiring.

Operational Safety

Outlines safety warnings and mandatory actions for inverter operation.

Read First

Names and Functions

Details the components and their functions, including exterior views and terminal boards.

Installation

Covers installation environment requirements and procedures.

Connection

Cautions on Wiring

Details essential safety warnings and mandatory actions for wiring.

Standard Connections

Illustrates standard wiring diagrams for SINK and SOURCE logic.

Description of Terminals

Explains the functions of power and control circuit terminals.

Operations

Simplified Operation

How to Operate the VF-nC3M

Setting Parameters

Setting and Display Modes

Describes the three display modes: Standard, Setting, and Status monitor.

How to Set Parameters

Explains parameter setting using Easy and Standard modes with panel keys.

Parameter Search Functions

Details functions for searching, setting by purpose, and resetting parameters.

EASY Key Function

Main Parameters

History Function Search

Guidance Function Setting

Setting Acceleration/Deceleration Time

Covers automatic and manual settings for acceleration and deceleration times.

Selection of Operation Mode

Explains how to select command and frequency setting modes.

Other Parameters

Input/Output Parameters

Input Signal Selection

Terminal Function Selection

Setting Frequency Command

Covers switching frequency commands and their characteristics.

Operation Frequency

Simple Servo Lock Function Settings

Explains enabling and configuring the simple servo lock function.

Trip-less Intensification

Covers auto-restart and regenerative power ride-through controls.

Dynamic Braking

Avoiding Overvoltage Tripping

Explains parameters for preventing overvoltage tripping during deceleration.

Brake Sequence Function

PID Control

Impact Stop Sequence Function

Torque Limit

Control Gain Adjustment Function

2nd Acceleration/Deceleration

Protection Functions

Details various protection functions like thermal, stall, trip retention, and emergency stop.

Operation Panel Parameter

Communication Function (RS485)

Operations with External Signal

Operating External Signals

I/O Signal Operations

Speed Instruction (Analog Signal) Settings

Monitoring Operation Status

Status Monitor under Normal Conditions

Display of Trip Information

Explains how to display trip codes and detailed trip information.

Peripheral Devices

Installation of Magnetic Contactor

Table of Parameters and Data

Input Terminal Function

Output Terminal Function

Before Making a Service Call

Trip Causes, Warnings, and Remedies

Lists common trip causes, probable causes, and suggested remedies.

Restoring the Inverter from a Trip

Provides methods for resetting the inverter after a trip.

Motor Not Running Without Trip Message

Determining Other Problems

Inspection and Maintenance

Regular Inspection

Periodical Inspection

Details periodic inspection procedures and checks for safe operation.

Disposal of the Inverter