6–10

Maintenance and Inspection

Troubleshooting and Maintenance

Maintenance and Inspection

Monthly andYearly InspectionChart

 

 

 

 

Inspection

 

 

Item Inspected

 

Check for...CycleInspection MethodCriteria

 

 

 

 

 

 

 

MonthYear

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Overall

Ambient

 

Extreme

 

Thermometer,

Ambient temperature

 

environment

 

temperatures

 

 

hygrometer

between -10 to 50°C,

 

 

 

& humidity

 

 

 

non-condensing

 

 

 

 

 

 

 

 

 

Major devices

 

Abnormal

 

Visual and aural

Stable environment for

 

 

 

vibration,

 

 

 

electronic controls

 

 

 

noise

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply

 

Voltage toler-

 

Digital volt meter,

200V class:

 

voltage

 

ance

 

 

measure between

200 to 240V 50/60 Hz

 

 

 

 

 

 

inverter terminals

400V class:

 

 

 

 

 

 

[L1], [L2], [L3]

380 to 460V 50/60 Hz

 

 

 

 

 

 

 

 

Main

Ground

 

Adequate

 

Megger test

500VDC, reading of 5M

circuit

Insulation

 

resistance

 

 

 

ohms or greater, see next

 

 

 

 

 

 

 

section for test details

 

 

 

 

 

 

 

 

 

Mounting

 

No loose

 

Torque wrench

M3: 0.5 – 0.6 Nm

 

 

 

screws

 

 

 

M4: 0.98 – 1.3 Nm

 

 

 

 

 

 

 

M5: 1.5 – 2.0 Nm

 

 

 

 

 

 

 

 

 

Components

 

Overheating

 

Thermal trip events

No trip events

 

 

 

 

 

 

 

 

 

Housing

 

Dirt, dust

 

Visual

Vacuum dust and dirt

 

 

 

 

 

 

 

 

 

Terminal block

 

Secure

 

Visual

No abnormalities

 

 

 

connections

 

 

 

 

 

 

 

 

 

 

 

 

 

Smoothing

 

Leaking,

 

Visual

No abnormalities

 

capacitor

 

swelling

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay(s)

 

Chattering

 

Aural

Single click when

 

 

 

 

 

 

 

switching ON or OFF

 

 

 

 

 

 

 

 

 

Resistors

 

Cracks or

 

Visual

Use Ohm meter to check

 

 

 

discoloring

 

 

 

braking resistors

 

 

 

 

 

 

 

 

 

Cooling fan

 

Noise

 

Power down,

Rotation must be smooth

 

 

 

 

 

 

manually rotate

 

 

 

 

 

 

 

 

 

 

 

 

Dust

 

Visual

Vacuum to clean

 

 

 

 

 

 

 

 

Control

Overall

 

No odor,

 

Visual

No abnormalities

circuit

 

 

discoloring,

 

 

 

 

 

 

 

corrosion

 

 

 

 

 

 

 

 

 

 

 

 

 

Capacitor

 

No leaks or

 

Visual

Undistorted appearance

 

 

 

deformation

 

 

 

 

 

 

 

 

 

 

 

 

Display

LEDs

 

Legibility

 

Visual

All LED segments work

 

 

 

 

 

 

 

 

 

Note 1:

The life of a capacitor is affected by the ambient temperature. See “Capacitor Life

 

 

Curve” on page 6–12.

 

 

 

 

Note 2:

The inverter must be cleaned periodically. If dust accumulates on the fan and heat

 

 

sink, it can cause overheating of the inverter.