Sourcetronic ST600 Series - Page 280

Frequency Inverter ST600 Series High-Performance Multifunction VFD Maintenance and hardware
fault diagnosis
-273-
Check whether the wire
sheaths are cracked or their
color changes.
Visual inspection
No exception
occurs.
Terminal block
Check whether there is
damage.
Visual inspection
No exception
occurs.
Filter capacitor
Check whether there is
electrolyte leakage,
discoloration, cracks, and
chassis expansion.
Visual inspection
No exception
occurs.
Check whether the safety
valves are released.
Determine the
service life based on
the maintenance
information, or
measure them
through electrostatic
capacity.
No exception
occurs.
Check whether the electrostatic
capacity is measured as
required.
Use instruments to
measure the
capacity.
Electrostatic
capacity ≥ initial
value × 0.85
Resistor
Check whether there is
displacement caused due to
overheat.
Olfactory and visual
inspection
No exception
occurs.
Check whether the resistors
are disconnected.
Visual inspection, or
remove one end of
the connection cable
and use a multimeter
for measurement.
Resistance range:
±10% (of the
standard
resistance)
Transformer and
reactor
Check whether there is unusual
vibration sounds or smells.
Auditory, olfactory,
and visual inspection
No exception
occurs.
Electromagnetic
contactor and
relay
Check whether there are
vibration sounds in the
workshop.
Auditory inspection
No exception
occurs.
Check whether the contacts are
in good contact.
Visual inspection
No exception
occurs.
Control
circuit
Control PCB,
connector
Check whether the screws and
connectors loose.
Screw them up.
No exception
occurs.
Check whether there is unusual
smell or discoloration.
Olfactory and visual
inspection
No exception
occurs.
Check whether there are
cracks, damage, deformation,
or rust.
Visual inspection
No exception
occurs.
Check whether there is
electrolyte leakage or
deformation.
Visual inspection,
and determine the
service life based on
the maintenance
No exception
occurs.