21
Item
Method
Interval
Terminal and cable
connection
•
Check whether the screws of the control
terminals
are
loose.
Refasten
them
with
screwdriver if necessary;
•
Check whether the terminals of the main circuit
are in poor contact and whether the screws are
hot;
•
Check if the connection busbar or screws are
discoloring.
•
Visual check the device terminal connection
and cable layout
Once per
year
Fan maintenance and
replacement
•
Check if there is crack in the fan blade;
•
Check if there is abnormal noise during the
running of the fan;
•
Replace the fan if necessary
Once per
year
Switches
maintenance
•
Routine check of the corrosion of the metal
components
•
Annually
check
the
contactors
(auxiliary
switches and micro-switches) to ensure the
optimal operation;
•
Check the running parameters (Voltage and
insulation especially)
From
every six
months to
annually
Safety function
•
Check the emergency stop button and the Web
stop function;
•
Simulation shutdown and check the shutdown
signal communication signal;
•
Check the warning labels and other markings
for damage or unclearness. Replace them if
necessary.
From
every six
months to
annually
Software
maintenance
•
Optimize software
•
Check each parameter setting
From
every six
months to
annually
Wait at least 5 minutes after the PCS discharge completely since the DC bus
contains capacitance. Before cleaning, make sure, with multimeter, the internal
PCS is discharged completely to avoid electric shock.
Operation & Maintenance Instruction
