HP 30 30 User Manual download pdf (Page 203)

Chapter 8 - Troubleshooting & Maintenance

8-9

8.6 Daily and Periodic Inspection Items

Period

Inspection

Location

Inspection

Item

Inspection

Daily

1 year

2 year

Inspection Method Criterion

Measuring

Instrument

Ambient

Environ-

ment

Is there any dust?

Is the ambient temperature and humidity

adequate?

Ο

Refer to the precautions Temperature:

-10~+40 no

freezing.

Humidity: Under

50% no dew

Thermometer,

Hygrometer,

Recorder

Equipment

Is there any abnormal oscillation or noise

Ο

Use sight and hearing No abnormality

All

Input

Voltage

Is the input voltage of the main circuit normal

Ο

Measure the voltage between the

terminals R, S, T

Digital Multi-

Meter/Tester

All

Megger check (between the main circuit and

the ground)

Are any fixed parts removed?

Are there any traces of overheating at each

component’s cleaning?

Ο

Ο

Ο

Ο

Undo the inverter connections short

the terminals R, S, T, U, V, W and

measure between these parts and the

ground.

Tighten the screws.

Visual check.

Over 5MΩ

No fault

DC 500V class

Megger

Conductor/

Wire

Is the conductor rusty?

Is the wire coating damaged?

Ο

Ο

Visual check No fault

Terminal

Is there any damage?

Ο

Visual check No fault

IGBT

Module

/Diode

Module

Check the resistance between each of the

terminals.

Ο

Undo the inverter connection and

measure the resistance between R, S,

T ⇔ P, N and U, V, W ⇔ P, N with a

tester.

(Refer ‘How to

Check Power

Components”)

Digital Multi-

Meter/Analog

Tester

Smoothing

Capacitor

Is there any liquid coming out?

Is the safety pin out, and is there any

swelling?

Measure the capacitance.

Ο

Ο

Ο

Visual check.

Measure with a capacitance-

measuring device.

No fault

Over 85% of the

rated capacity

Capacitance

Measuring Device

Relay

Is there any chattering noise during

operation?

Is there any damage to the contact

Ο

Ο

Auditory check.

Visual check.

No fault

Main Circuit

Resistor

Is there any damage to the resistor

insulation?

Is the wiring in the resistor damaged (open)?

Ο

Ο

Visual check.

Disconnect one of the connections

and measure with a tester.

No fault

Error must be

within ±10% the

displayed

resistance

Digital Multi-

Meter/Analog

Tester

Control Circuit

Protective Circuit

Operation

Check

Is there any unbalance between each

phases of the output voltage?

Nothing must be wrong with display circuit

after executing the sequence protective

operation

Ο

Ο

Measure the voltage between the

output terminals U, V and W.

Short and open the inverter protective

circuit output.

The voltage

balance between

the phases for

200V (800V) class

is under 4V (8V).

The fault circuit

operates according

to the sequence.

Digital Multi-

Meter/Rectifying

Voltmeter

Cooling

System

Cooling

Fan

Is there any abnormal oscillation or noise?

Is the connection area loose?

Ο

Ο

Turn OFF the power and turn the fan

by hand.

Tighten the connections.

Must rotate

smoothly.

No fault

Display

Meter

Is the displayed value correct?

Ο Ο

Check the meter reading at the

exterior of the panel

Check the

specified and

management

values.

Voltmeter/

Ammeter etc.

All

Are there any abnormal vibrations or noise?

Is there any unusual odor?

Ο

Ο

Auditory, sensory, visual check.

Check for overheat and damage.

No fault

Motor

Insulation

Resistor

Megger check (between the output terminals

and the ground terminal)

Ο

Undo the U, V and W connections and

tie the motor wiring.

Over 5MΩ

500V class

Megger

Note: Values in ( ) is for the 400V class inverters.

1 2 ... 198 199 200 201 202 203 204 205 206 207 208 ... 217 218

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