80
Inspection Item
6.1.3
Daily and periodic inspection
A
rea o
f
Ins
p
ec
tion
Inspection
Item
Inspection Item
Interval
Method
Criterion
Instrument
Cus
tom
e
r's
ch
eck
Da
ily
Periodic*
1
ye
ar
s
2
ye
ar
s
General
Surrounding
environment
Check ambient
temperature, humidity,
dust, dirt, etc.
Measure 5cm (1.97
inches) away from the
inverter.
(Refer to page 6.)
Ambient
temperature:
-10°C to +50°C
(14°F to 122°F),
non-freezing.
Ambient humidity:
90% or less, non-
condensing.
Thermometer,
hygrometer,
recorder
Overall
unit
Check for unusual
vibration and noise.
Visual and auditory
checks.
No fault
Power
supply
voltage
Check that the main
circuit voltages are
normal.
Measure voltages
across inverter terminal
block R/L1, S/L2, T/L3
phases.
Within permissible
AC (DC) voltage
fluctuation
(Refer to page 90.)
Tester,
digital
multimeter
Main
circuit
General
(1) Check with megger
(across main circuit
terminals and earth
(ground) terminal)
(1) Disconnect all
cables from the
inverter and
measure across
terminals R/L1, S/
L2, T/L3, U, V, W
and earth terminal
with megger.
(Refer
to page 88.)
(2) Retighten.
(3) Visual check
(1)
5M
Ω
or more.
(2)(3)
No fault
500VDC
class
megger
(2) Check for loose
screws and bolts.
(3) Check for overheat
traces on the parts.
(4) Clean.
Conductors,
cables
(1) Check conductors
for distortion.
(1)(2)
Visual check
(1)(2)
No fault
(2) Check cable sheaths
for breakage
Terminal
block
Check for damage.
Visual check
No fault
Inverter
module,
Converter
module
Check resistance
across terminals.
Disconnect all cables
from the inverter and
measure across
terminals R/L1, S/L2, T/
L3, P/
+
, N/
−
and U, V,
W, P/
+
, N/
−
with a meter
range of 100
Ω
.
(Refer to page 83)
Analog
tester
Relay
(1) Check for chatter
during operation.
(1) Auditory check.
(2) Visual check
(3) Judge by the inrush
current limit circuit
and the life check of
the relay.
(1)(2) No fault
(2) Check for rough
surface on
contacts.
Smoothing
capacitors
Check for fluid leakage
and crack.
Visual check and judge
by the life check of the
main circuit capacitor.
Summary of Contents for FR-F700 Series
Page 134: ...MEMO ...
