Unitronics UMI-B1 UL Series Operation Manual page 102

UMI-B1 UL Series Inverter
Checking part
Transformers and
reactors
Electromagnetism
contactors and
relays
Control
PCB and plugs
circuit
Cooling
Cooling fan
system
Checking item
Ensure there is no
abnormal vibration,
noise and smelling,
Ensure whether there
is vibration noise in the
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.
100
Checking
method
remove one the standard
ending to value.
coagulate or
measure with
multimeters
Hearing,
smelling and
NA
visual
examination
Hearing NA
Visual
NA
examination
Fasten up NA
Smelling and
visual NA
examination
Visual
NA
examination
Visual
examination or
estimate the
usage time NA
according to the
maintenance
information
Hearing and
Visual
Stable rotation
examination or
rotate with hand
Tighten up NA
Fault tracking
Criterion