INVT Goodrive20-UL VFD Series Operation Manual page 108

Goodrive20-UL Series VFD
Checking part
Transformers and
reactors
Electromagnetism
contactors and
relays
Control
PCB and plugs
circuit
Cooling
Cooling fan
system
Checking item
Ensure that there is no
offline.
Ensure there is no
abnormal vibration, noise
and smelling,
Ensure whether there is
vibration noise
workrooms.
Ensure the contact is good
enough.
Ensure there are no loose
screws and contactors.
Ensure there is no
smelling and
color-changing.
Ensure there are no
crackles, damage
distortion and rust.
Ensure there is no
weeping and distortion to
the capacitors.
Estimate whether there is
abnormal noise and
vibration.
Estimate there is no
losses screw.
-103-
Checking
method
Visual
examination or
remove one
ending to
coagulate or
measure with
multimeters
Hearing,
smelling and
visual
examination
in the Hearing
Visual
examination
Fasten up
Smelling and
visual
examination
Visual
examination
Visual
examination or
estimate the
usage time
according to the
maintenance
information
Hearing and
Visual
examination or
rotate with hand
Tighten up
Fault tracking
Criterion
The resistors
are in ± 10% of
the standard
value.
NA
NA
NA
NA
NA
NA
NA
Stable rotation
NA