Hitachi SJ700-2 Series service manual Daily and Periodic Inspections

Page 48

5.2 Daily and Periodic Inspections

Part to

 

 

Inspection cycle

 

 

 

 

 

 

 

 

 

 

 

inspect

Inspection item

Detail of inspection

Daily

Periodic

Inspection method

 

 

 

 

Criterion

 

 

 

Test equipment

 

 

 

 

Annual

Biennial

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

General

Environment

Check the ambient temperature,

 

 

 

See Section 2.1, "Installation."

The ambient temperature must

Thermometer,

 

 

humidity, and dust.

 

 

 

 

be within -10°C to +50°C without

hygrometer,

 

 

 

{

 

 

 

congelation.

 

The

 

ambient

recorder

 

 

 

 

 

 

 

humidity must be 90% RH or less

 

 

 

 

 

 

 

 

without condensation.

 

 

 

 

Whole inverter

Check for abnormal vibrations and

{

 

 

Check visually and by listening.

There must be no abnormality

 

 

 

noise.

 

 

 

 

found.

 

 

 

 

 

 

 

 

Power supply

Check that the main circuit voltage

 

 

 

Measure the voltage between the

The measured voltage must be

Tester, digital

 

voltage

is normal.

{

 

 

main circuit terminals R, S, and T.

within the allowable tolerance for

multimeter

 

 

 

 

 

 

 

AC power voltage.

 

 

 

 

Main

General check

(1) Check the ground resistance

 

 

 

Disconnect all input and output cables

 

 

 

 

 

 

 

 

 

500 VDC class

circuit

 

between the main circuit and

 

 

 

from the inverter's main circuit terminal

 

 

 

 

 

 

 

 

 

megger

 

 

ground terminals with a megger.

 

 

 

block, detach the control circuit terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

block from the inverter, and remove the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

jumper for switching the inverter's

The measured ground resistance

 

 

 

 

 

{

 

internal filter function. Subsequently,

 

 

 

 

 

 

measure the insulation resistance

must be 5Mor more.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

between the ground terminal and the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

jumper connecting all the following

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

terminals:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R, S, T, U, V, W, P, PD, N, RB, R0, and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T0

 

 

 

 

 

 

 

 

 

 

 

 

(2) Check screws and bolts for

{

 

 

Retighten loose screws and bolts.

There

must

be

no

abnormality

 

 

 

loosening.

 

 

 

found.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3) Check each part for any trace of

{

 

 

Check visually.

There must be no abnormality

 

 

 

overheating.

 

 

 

 

found.

 

 

 

 

 

 

 

 

Connecting

(1) Check the conductors for

{

 

 

Check visually

 

 

 

 

 

 

 

 

 

 

 

conductors and

distortion.

 

 

 

There must be no abnormality

 

 

 

 

 

 

 

 

cables

(2) Check the cable insulations for

{

 

 

 

found.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

damage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminal block

Check the terminal blocks for

{

 

 

Check visually

There

must

be

no

abnormality

 

 

 

damage.

 

 

 

found.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inverter circuit

Check the resistance between

 

 

 

Remove all cables from the

See Section 6.5, "Method of

Analog tester

 

and converter

terminals.

 

 

 

inverter's main circuit terminal block.

 

 

circuit (including

 

 

 

 

Use a tester (in 1Ω range mode) to

Checking

 

the

Inverter

and

 

 

resistors)

 

 

 

{

measure the following:

Converter

Circuits."

 

Standard

 

 

 

 

 

 

- Resistance between terminals R,

operating life of inverter circuit

 

 

 

 

 

 

 

S, and T and terminals P and N

until replacement: 106 cycles of

 

 

 

 

 

 

 

- Resistance between terminals U,

starting and stopping (*3)

 

 

 

 

 

 

 

 

V, and W and terminals P and N

 

 

 

 

 

 

 

 

 

 

 

Smoothing

(1) Check for liquid leak.

{

 

 

Check visually.

There must be no abnormality

Capacitance

 

capacitor

(2) Check that the relief valve does

 

 

 

 

found.

operating

life

until

meter

 

 

 

 

 

 

 

 

 

 

 

Target

 

 

 

not protrude or swell.

{

 

 

 

replacement: 10 years

 

 

 

 

 

 

 

 

 

 

(*1) (*3)

 

 

 

 

 

 

 

 

Relay

(1) Check that no fluttering sound is

 

 

 

Check by listening.

There

must

be

no

abnormality

 

 

 

generated during the relay

 

{

 

 

 

 

 

 

 

 

found.

 

 

 

 

 

 

 

 

 

operation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2) Check the contacts for damage.

 

{

 

Check visually.

There

must

be

no

abnormality

 

 

 

 

 

 

 

found.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control

Operation

(1) While performing a unit

 

 

 

Measure the voltage between the

The inter-phase voltage balance

Digital

and

 

operation of the inverter, check

 

{

 

cables connected to the main circuit

must be as follows:

 

 

 

multimeter,

protective

 

the balance output voltage

 

 

terminals U, V, and W.

200 V class models: 4 V or less

rectifier

circuits

 

among the individual phases.

 

 

 

 

400 V class models: 8 V or less

instrument, and

 

 

(2) Carry out a sequential

 

 

 

Short-circuit or open the protective

An

error

must be

detected

voltmeter

 

 

 

 

 

 

 

protection operation test, and

 

{

 

circuit outputs as a simulation.

 

 

 

check the protective and display

 

 

 

according to the sequence.

 

 

 

 

 

 

 

 

 

 

 

 

circuits for any abnormality.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling

Cooling fan

(1) Check for abnormal vibrations

{

 

 

Turn the fan manually during the

The

fan

must

rotate

smoothly.

 

system

 

and noise

 

 

inverter power-off status.

There must be no abnormality

 

 

 

 

 

 

 

 

(2) Check the joints for loosening.

 

 

 

Check visually.

found.

operating

 

life

until

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard

 

 

 

 

 

 

{

 

 

replacement: 10 years

 

 

 

 

 

 

 

 

 

 

(*2) (*3)

 

 

 

 

 

 

 

 

Heat sink

Check for clogging.

 

{

 

Check visually.

The

 

heat

sink

must

not

be

 

 

 

 

 

 

 

clogged.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Display

Monitor

(1) Check that all LEDs light up

{

 

 

Check visually.

The LEDs must light up normally.

 

 

 

normally.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2) Clean the monitor.

 

{

 

Clean the monitor with a rag.

 

 

 

 

 

 

 

 

 

 

 

Meter

Check that meter readings are

{

 

 

Check the meter readings on the

The

 

readings must

meet

the

Voltmeter and

 

 

normal.

 

 

panel.

standard and control values.

 

ammeter

 

 

 

 

 

 

Motor

General

(1) Check for abnormal vibrations

{

 

 

Check vibrations and noise visually,

There

must

be

no

abnormality

 

 

 

and noise.

 

 

by listening, and with physical

found.

 

 

 

 

 

 

 

 

 

 

 

 

 

senses.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2) Check for unusual smells.

{

 

 

Check for any unusual smells

There

must

be

no

abnormality

 

 

 

 

 

 

caused by overheating or damage.

found.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Insulation

Check the ground resistance

 

 

 

Remove the cables from the

 

 

 

 

 

 

 

 

 

500 VDC class

 

resistance

between all motor terminals and the

 

 

 

inverter's main circuit terminals U, V,

 

 

 

 

 

 

 

 

 

megger

 

 

ground terminal with a megger.

 

 

 

and W, connect the motor wires (for

The measured ground resistance

 

 

 

 

 

 

{

three phases) with one another, and

must be 5Mor more.

 

 

 

 

 

 

 

 

 

measure the ground resistance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

between the motor wires and the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ground terminal.

 

 

 

 

 

 

 

 

 

 

*1 The operating life of the smoothing capacitor is under the influence of the ambient temperature. Refer to Section 6.6, "Smoothing-Capacitor Life Curve," as a standard for the operating life until replacement.

*2 The operating life of the cooling fan varies depending on environmental conditions, including the ambient temperature and dust. Check the status of the cooling-fan operation during daily inspections.

*3 The standard operating life (number of years or operation cycles) and the data described in Section 6.6, "Smoothing-Capacitor Life Curve," are based on the expected design life, but they do not indicate the guaranteed life of any parts.

5 - 2

Image 48
Contents SJ700-2 Series NTS204X Table of contents Appendix Specification labelModel name,Manufacturing numberMFG Investigation of the inverterPrecautions for Data Setting Function Mode Extended Function Mode PID FEF FUF AVR Electronic thermal characteristic, 2nd B034 Free-setting V/f frequency To 400. Hz FEF FUF FEF FUF FF FEF FUF Term inal C111 FEF FUF FEF FUF RPM Specification FEF FUF FEF FUF Code display system and key operations Page Corresponding to the function code. Data display *1*2 Example of operation in full display mode b037 = STR key after changing the dataPressing the STR key Troubleshooting Inverter trip contents,remedy,adviseCPU GA.COM Adjust Option boards error codes OFFInput mode specified by switch settings Setting of MAC ID DIP switches No to No Error code is output when the relevant program runs Trip conditions monitoring 305 A004/A204/A304 A202/A220/A320 *2 006 Initialization setting Page Debug Mode Monitor ModesFunction Modes Inverter Setting Setting procedureConfirming the completion of initialization HFF/-HFUF/-HFEFControl signal VDCPage Cleaning Daily inspectionPeriodic inspection Daily and Periodic Inspections Ground Resistance Test with a Megger Method of Checking the Inverter and Converter Circuits Replacing Parts Page Page Inverter Replacement Control board SJ700-055-110LF**2 Circuit Diagram SJ700-150LF**2 185LF**2 Circuit Diagram Ground Terminal With JumperSJ700-220LF**2 Circuit Diagram SJ700-300LF**2 Circuit Diagram SJ700-370LF**2 Circuit Diagram SJ700-450LF**2 Circuit Diagram Driver BoardSJ700-550LF**2 Circuit Diagram SJ700-055-110HF**2 Circuit Diagram SJ700-150HF**2 Circuit Diagram SJ700-185HF**2 220HF**2 Circuit Diagram Circuit Diagram SJ700-300HF**2SJ700-370HF**2 Circuit Diagram TMC CN1 Page Page Page Page Page Page Page Page Page Page Page