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Chapter 6 Fault Codes and Descriptions |DD Series
6-9
DC capacity of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any leak of liquid, color
change, crack or deformation
Visual inspection
{
If the safety valve is not removed? If
valve is inflated?
Visual inspection
{
Measure static capacity when
required
{
Resistor of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any peculiar smell or
insulator cracks due to overheat
Visual inspection, smell
{
If there is any disconnection Visual inspection
{
If connection is damaged?
Measure with multimeter with standard
specification
{
Transformer and reactor of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any abnormal vibration or
peculiar smell
Visual, aural inspection and smell
{
Magnetic contactor and relay of main circuit
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there are any loose screws Visual and aural inspection
{
If the contact works correctly Visual inspection
{
Printed circuit board and connector of main circuit