Mitsubishi Electric Freqrol-A100 Instruction Manual page 172

Daily and Periodic Inspection
Area 01
~ s p e c t l o n
lnspectlon
I t e m
Descrlptlon Method
c r l t e r l o n
Instrument
2 years
I
mbient temperature:
-1 0% to +50°C
,
non-freezing.
mbient humid~ty:
90% or less.
Thermometer,
hygrometer,
recorder
heck ambient temperature,
umidlty, dust, dlrt, etc.
1 ° 1
( S e e page 9.
Visual and auditory checks.
t
non-condensing.
I
:heck for unusual vibration
eneral
taln circuit
lverall unit
lo fault.
Measure voltage across
inverter terminals R-S-T.
70 to 242V
323 to 506V) 50Hz Tester.
70 to 253V
digital
multimeter
ower sup-
ly voltage
ieneral
'
:heck that main circuit
oltage is normal.
from inverter and mea-
sure across terminals R,
S, T, U, V, W and ground
1) 5 M n or more.
2), (3) No fault.
I
1) Check with megger
0
(across main circuit
terminals and ground
terminal).
21 Check for loose screws 0
5OOVDC
class rnegger
terminal with megger.
(2) Retighten:
(3) Visual check.
and bolts
3) Check for overheat on
each part.
1) Check conductors for
d~stortion.
2) Check cable sheaths for
I
I), (2) No fault.
( l ) , (2) Visual check.
:onductors,
ables
'erminal
dock
nverter
nodule
:onverter
nodule
;moothing
:apacitor
:heck for damage. 0
Visual check
inverter and measure across
terminals R, S, T u P , N, and
across U, V, W u P , N with
( I ) , (2) Visual check.
(3) Measure with capaclty
meter.
40 fault
I
Analog tester
:heck resistance across
errninals.
I I
See the next page.)
meter
1) Check for liquid leakage. 0
2) Check for safety valve
0
projection and bulge.
3) Measure electrostatic 0
capacity.
:1) Check for chatter during
0
operation.
:2) Checkfor rough surface 0
on contacts.
(1) Checkfor crack in resis-
0
tor insulation.
(2) Check for open cable.
0
( I ) Auditory check.
(2) Visual check.
11) No fault.
:2) No fault.
3elay
qesistor
Operation
check
tance value. multimeter
(1) Visual check. Cement re-
slstor, wire-wound resis-
tor.
(2) Disconnect one end and
measure with tester.
(1) Measure voltage across
inverter output terminals
U-v-W.
(2) Simulatively connect or
disconnect inverter
protective circuit output
terminals.
balance within 4V (8V) for
200V (400V).
rectifier type
voltmeter
-
(1) Check balance of output
0
voltages across phases
with inverter operated
independently.
(2) Perform sequence prOteC- 0
tive operatlon test to
make sure of no fault i n
protective and display cir-
cuits.
(1) Check for unusual vibra-
0
tion and noise.
(2) Check for loose connec-
0
:ontrol
:ircu~t
'rotective
:ircuit
:ooling
system
-
(1 ) Smooth rotation.
(2) No fault.
(1) Turn by hand with power
(2) Retighten.
Cooling fan
D~splay
(1) Check that lamps are lit.
(1) Check for LED lamp
blown.
(1) Lamps indicate indicator
lamps on panel.
Check reading of meters on
anel.
( I ) Auditory, sensory, visua
checks.
(2) Check for unusual odor
due to overheat, damag(
Meter
Check that reading is normal.
(1) Check for unusual vibra-
tion and noise.
(2) Check for unusual odor.
( I ) , (2) No fault.
General
I
I
Check with megger (across
terminals and ground termi-
- -
lnsulatlon
resistance
Disconnect cables from U. \i
W, including motor cables.
5 M n or more. 500V megger
Note: The value for the 400V class is indicated in the parentheses.