INVT Goodrive270 Series Operation Manual page 297

Goodrive270 series VFD for fan and pump
Check scope
Conductor and
wire
Terminal block
Filter capacitor
Resistor
Transformer,
Reactor
Electromagnetic Check whether there are
Check category
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.
Method
Visual inspection No exception.
Visual inspection No exception.
Visual inspection No exception.
Visual inspection No exception.
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
-287-
Maintenance
Criterion
No exception.
Electrostatic
capacity ≥ initial
value x 0.85
No exception.
Resistance range:
±10% (of the
standard
resistance)
No exception.
No exception.