t
Check
Point
Checking Item
Dwcrlption
Inwrter
Periodic
Dally .
1 ywr 2 year
Chocking Method
Judgment
Meaalurinp
lnstrumrnt
Environnlwt
Check ambient temperature, humidity, dust.
0
Rnhr to cautions on paga 6. Ambirnt temperature -1O’c to +SaC (+14f Thrrmomrar.
etc.
to +122’F) ; No frnxing.
hygrometer.
Ambirnt humidity SOURH or lass: No con&-
rnordrr
Gwwr*l ’
nrlng.
Whole rquipmont
/
Chmk that thrra ir no unutud vibration and O
Visual and auditory chock@. Should k normal.
noita.
I
supply voltage
Gmwd
Conductor. ublr
Check that main circuit and control voltaS*
ore normal.
O
Measure voltage (Iwo* inwrtrr terminal Mock 0 180 - 220; l:E 1 440:; ZO:
multimeter
torminrlr R. 8 and T.
l 180 -
digital multimater
(11 Check with meggw (across main circuit
and ground tbrminal) .
0 0
HI Dlmomwct tha invutrr and mnrrure (1) 6M OHM or larger.
WOV mwgtr
rrlstana across batch of terminals (2) (3) Should k normal.
(2) Chock that fastenad parts.rre not loom.
13) Chock that porta hrw no owrhut trau.
8
R. S. T, LJ. V, W and around terminal with
14) Clwn.
mwg9.r.
(2) Fasttm.
(3) Visual Chock.
(1) Check that conductor is not dietort&.
8
(1) (2) Visual ahack. (1) (21 should bb normal.
(21 Chack that cable rhuth i# not broken.
Tarmind block
Trrndstor module
Diode module
Main circuit
Chnk for damago.
Check mist~nce acroa ah orminrls.
0
Viruel &ask. Should k normal.
0
Di@connect thr inwrtw and mratun resist-
Refer to Table 7-4.
An&S multimeter
anca mron hrmlnals R.S.T and P. N and
awon U. V. W and P. N with a multjmrtw
by 1 OHM ron~r
Smoothing
rpwity
AaIry. contactor
Rrirtor
(1) Chack tar lukap of rlactrdytt.
(2) chuk
thr
wfety VdW.
‘3) Mwwn notit copuity.
(1) Chock for tramor.
(2i Cheek for contact roughen.
(1) Check for resistor insulator crack.
12) Check for wlrr break.
(1) (21 Vi8ual thack.
8
(1) 0) Should k normal.
Capwitor meter
(3) Mea~un with capacity measuring instru- (3) 85% or man of rated wpacity.
0 ment8.
8
(1) Auditory check. (II Should br normal.
(2) Visual c&k.
(21 Should k normal.
(1) Should k normal.
Multjmmr. Digital
8
(1) Vl8url ahack (Ceramic rrsictor. wound R-
sirtor. 9tc) .
(2) ;~ti;~uld k within f10% of sceified multimater
(2) Disconnect lrad on one sldr and measure
with multim#rr.
:antrol circuit Operation chtok
WOtUtiW
:imuit
(1) Chrck output voltaga balmtea across wch
phases without motor.
(2) After nquana prouetiw operation tact.
chuk that protutlw and die& chita
should k normal.
0
0
(1) Mearun volteg* acrow inwrtw output
twmlnalo U. V and W.
(2) Simulativaly rhort-clreult the lnv&
Alarm rlgnal output.
(1) Voltage balona for 2OSV (4OOV) should
Digital multimrtrr.
br wlthin 4V (8V) .
rutlfior typ volt-
(2) Alarm &cult rhould k actuated.
meter
phi
mm
Dirplry
Motor
CodInS fan
Dirplay
Meter
Guwral
Insulation rrrirtatwa
(1) Cheek for unwtal vibration and noln.
0
(2)
Chuk that wmutlon h not loon.
(1) Switch poww off and turn by h&d. (1) Should turn wnwthly8
0 (2) Should b normal.
(3) Ghan rlr flltar.
0
(2) Ratighan.
-
-_
{:I Eh$ that Iamy have not blown.
0 (1) Panel indicator Iampc. (1) Clean that lamp light.
0 (2) Clrrn with cloth.
Chack that wading Is corract. 0
(II Chak panel meter reading.
(1) Should satisfy specified and control
Voltmeter,
VSIVU.
etc.
(1) Check for unusual vibration and noisr.
(21 Chrcl: for unusurf rmrll.
(1) Auditory. tactile and visual checks. (1) (2J Should k normal.
(21 Check for unusual #mrll due to overheat,
dsmsgr etc.
(1) Check with nuggw (-roes batch trrmin-
(1) Should ba 6M OHM or larger. MH)V mm
elr and ground terminal) .
0
(1) Clbl,nnwt U. V and W. Includrc motor
.
0
0
Table 2 Daily and periodic inspection schedule
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