HP 30 30 Daily and Periodic Inspection Items, Inspection Method Criterion Measuring Instrument

Chapter 8 - Troubleshooting & Maintenance

8.6

Daily and Periodic Inspection Items

Inspection

Location

Inspection Item

Period

Inspection

Daily

year1

year2

Inspection Method

Criterion

Measuring

Instrument

Is there any dust?

Refer to the precautions

Temperature:

Thermometer,

Ambient

Is the ambient temperature and humidity

-10~+40 no

Hygrometer,

Environ-

adequate?

Ο

freezing.

Recorder

All

ment

Humidity: Under

50% no dew

Equipment

Is there any abnormal oscillation or noise

Ο

Use sight and hearing

No abnormality

Input

Is the input voltage of the main circuit normal

Ο

Measure the voltage between the

Digital Multi-

Voltage

terminals R, S, T

Meter/Tester

Megger check (between the main circuit and

Ο

Undo the inverter connections short

Over 5MΩ

DC 500V class

the ground)

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

No fault

Megger

All

Are any fixed parts removed?

Ο

Ο

measure between these parts and the

Are there any traces of overheating at each

Ο

ground.

component’s cleaning?

Tighten the screws.

Visual check.

Conductor/

Is the conductor rusty?

Ο

Visual check

No fault

Wire

Is the wire coating damaged?

Ο

Terminal

Is there any damage?

Ο

Visual check

No fault

IGBT

Check the resistance between each of the

Ο

Undo the inverter connection and

(Refer ‘How to

Digital Multi-

Circuit

Module

terminals.

measure the resistance between R, S,

Check Power

Meter/Analog

/Diode

T ⇔ P, N and U, V, W ⇔ P, N with a

Components”)

Tester

Main

Module

tester.

Is there any liquid coming out?

Ο

Visual check.

No fault

Capacitance

Smoothing

Is the safety pin out, and is there any

Ο

Measure with a capacitance-

Over 85% of the

Measuring Device

Capacitor

swelling?

measuring device.

rated capacity

Measure the capacitance.

Ο

Is there any chattering noise during

Ο

Auditory check.

No fault

Relay

operation?

Is there any damage to the contact

Ο

Visual check.

Is there any damage to the resistor

Ο

Visual check.

No fault

Digital Multi-

insulation?

Error must be

Meter/Analog

Resistor

Is the wiring in the resistor damaged (open)?

Ο

Disconnect one of the connections

within ±10% the

Tester

and measure with a tester.

displayed

resistance

Is there any unbalance between each

Ο

Measure the voltage between the

The voltage

Digital Multi-

CircuitControl

CircuitProtective

phases of the output voltage?

output terminals U, V and W.

balance between

Meter/Rectifying

the phases for

Voltmeter

Operation

Nothing must be wrong with display circuit

Ο

Short and open the inverter protective

200V (800V) class

Check

after executing the sequence protective

circuit output.

is under 4V (8V).

operation

The fault circuit

operates according

to the sequence.

Is there any abnormal oscillation or noise?

Ο

Turn OFF the power and turn the fan

Must rotate

Cooling

System

Is the connection area loose?

Ο

by hand.

smoothly.

Cooling

Tighten the connections.

No fault

Fan

Is the displayed value correct?

Ο

Ο

Check the meter reading at the

Check the

Voltmeter/

Display

exterior of the panel

specified and

Ammeter etc.

Meter

management

values.

All

Are there any abnormal vibrations or noise?

Ο

Auditory, sensory, visual check.

No fault

Motor

Is there any unusual odor?

Ο

Check for overheat and damage.

Insulation

Megger check (between the output terminals

Ο

Undo the U, V and W connections and

Over 5MΩ

500V class

Resistor

and the ground terminal)

tie the motor wiring.

Megger

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

8-9