Daily And Periodic Inspection - Mitsubishi Electric FR-E520 Instruction Manual

6.1.6

Daily and periodic inspection

Inspection
Description
Item
Check ambient
Surrounding temperature,
environment humidity, dust, dirt,
etc.
Check for unusual
Overall unit
vibration and noise.
Power Check that main
supply circuit voltage is
voltage normal.
(1) Check with
megger (across
main circuit
terminals and
earth (ground)
terminal).
General
(2) Check for loose
screws and bolts.
(3) Check for
overheat on each
part.
(4) Clean.
(1) Check conductors
for distortion.
Conductors,
(2) Check cable
cables
sheaths for
breakage.
Terminal
Check for damage.
block
Inverter
module Check resistance
Converter across terminals.
module
(1) Check for liquid
leakage.
(2) Check for safety
valve projection
Smoothing
and bulge.
capacitor
(3) Measure
electrostatic
capacity.
MAINTENANCE/INSPECTION
Interval
Periodic*
Method
$
Refer to page 14.
Visual and auditory
$
checks.
Measure voltage
across inverter
$
terminals R-S-T (L
L -L ).
2 3
$ (1) Disconnect all
cables from
inverter and
measure across
terminals R (L
S (L ), T (L
2
V, W and earth
$
(ground) terminal
with megger.
$
(2) Retighten.
(3) Visual check.
$
$
(1), (2) Visual check. (1), (2) No
$
$
Visual check
Disconnect cables
from inverter and
measure across
terminals R, S, T-P,
$
N (L , L , L
1 2
and across U, V, W -
P (+), N (–) with a
meter with a 100Ω
range.
$
(1), (2) Visual check. (1), (2) No
$
$
(3) Measure with
capacity meter.
202
Criterion
Ambient
temperature:
-10°C to +50°C,
non-freezing.
Ambient
humidity: 90%
or less, non-
condensing.
No fault.
Within
permissible AC
(DC) voltage
- fluctuation
1
(Refer to page
214)
(1) 5MΩ or
more.
),
1
), U,
3
(2), (3) No fault.
fault.
No fault
Refer to page
- +, –),
3
204.
fault.
(3) 85% or
more of
rated
capacity.
Instrument
Thermo-
meter,
hygrometer,
recorder
Meter,
digital
multimeter
500VDC
class megger
Analog meter
Capacity
meter