Filter
Top Products
Chapter 6 Fault Codes and Descriptions |DD Series
6-7
6.2 Maintenance and Inspections
Before the check-up, always turn off the AC input power and remove the cover. Wait at least 10 minutes
after all display lamps have gone out, and then confirm that the capacitors have fully discharged by
measuring the voltage between DC+ and DC-. The voltage between DC+ and DC-should be less than
25VDC.
Ambient environment
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
Check the ambient temperature,
humidity, vibration and see if there
are any dust, gas, oil or water drops
Visual inspection and measurement with
equipment with standard specification
{
If there are any dangerous objects Visual inspection
{
Voltage
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
Check if the voltage of main circuit
and control circuit is correct
Measure with multimeter with standard
specification
{
Keypad
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
Is the display clear for reading Visual inspection
{
Any missing characters Visual inspection
{
Mechanical parts
Maintenance
Period
Check Items Methods and Criterion
Daily
Half
Year
One
Year
If there is any abnormal sound or
vibration
Visual and aural inspection
{