INVT Goodrive350-19 Series Operation Manual page 387

Goodrive350-19 Series VFD for Crane
Check scope
Conductor and
wire
Terminal block
Filter capacitor
Resistor
Transformer
and reactor
Electromagnetic
contactor and
Relay
Control Control PCB
circuit and connector
Item
Check whether conductors are
deformed or color change for
overheat.
Check whether the wire
sheaths are cracked or their
color changes.
Check whether there is
damage.
Check whether there is
electrolyte leakage,
discoloration, cracks, and
chassis expansion.
Check whether the safety
valves are released.
Check whether the electrostatic
capacity is measured as
required.
Check whether there is
displacement caused due to
overheat.
Check whether the resistors
are disconnected.
Check whether there is
unusual vibration sounds or
smells.
Check whether there are
vibration sounds in the
workshop.
Check whether the contacts
are in good contact.
Check whether the screws and
connectors loose.
Method
Visual inspection
Visual inspection
Visual inspection
Visual inspection
Determine the
service life based
on the maintenance
information, or
measure them
through
electrostatic
capacity.
Use instruments to
measure the
capacity.
Olfactory and visual
inspection
Visual inspection, or
remove one end of
the connection
cable and use a
multimeter for
measurement.
Auditory, olfactory,
and visual
inspection
Auditory inspection
Visual inspection
Screw them up.
-375-
Maintenance
Criterion
work properly.
No exception
occurs.
No exception
occurs.
No exception
occurs.
No exception
occurs.
No exception
occurs.
Electrostatic
capacity ≥ initial
value x 0.85
No exception
occurs.
Resistance range:
±10% (of the
standard
resistance)
No exception
occurs.
No exception
occurs.
No exception
occurs.
No exception
occurs.