INVT GD300-075G-4 - Page 208

Goodrive300 Series VFD Maintenance and hardware fault diagnostics
203
Checking
Item
Method
Criterion
overheating.
Ensure that there are no
crackles or color-changing of
the protective layers.
Visual examination
NA
Terminals
seat
Ensure that there is no
damage
Visual examination
NA
Filter
capacitors
Ensure that there is no
weeping, color-changing,
crackles and cassis
expansion.
Visual examination
NA
Ensure the safety valve is in
the right place.
Estimate the usage
time according to the
maintenance or
measure the static
capacity.
NA
If necessary, measure the
static capacity.
Measure the capacity
by instruments.
The static capacity
is above or equal to
the original value ×
0.85.
Resistors
Ensure whether there is
replacement and splitting
caused by overheating.
Smelling and visual
examination
NA
Ensure that there is no offline.
Visual examination or
remove one ending to
coagulate or measure
with multimeters
The resistors are in
±10% of the
standard value.
Transform
ers and
reactors
Ensure there is no abnormal
vibration, noise and smelling.
Hearing, smelling and
visual examination
NA
Electroma
gnetism
contactors
and relays
Ensure whether there is
vibration noise in the
workrooms.
Hearing
NA
Ensure the contactor is good
enough.
Visual examination
NA
Control
circuit
PCB and
plugs
Ensure there are no loose
screws and contactors.
Fasten up
NA
Ensure there is no smelling
and color-changing.
Smelling and visual
examination
NA