83
Inspection Item
6
P
R
E
CAUT
IO
NS
FOR
M
A
INTE
NANCE
AND INS
P
E
C
TION
6.1.5
Checking the inverter and converter modules
<Preparation>
(1) Disconnect the external power supply cables (R/L1, S/L2, T/L3) and motor cables (U, V, W).
(2) Prepare a tester. (Use 100
Ω
range.)
<Checking method>
Change the polarity of the tester alternately at the inverter terminals R/L1, S/L2, T/L3, U, V, W, P/+ and N/
−
, and
check for continuity.
<Module device numbers and terminals to be checked>
(Assumes the use of an analog meter.)
6.1.6
Cleaning
Always run the inverter in a clean status.
When cleaning the inverter, gently wipe dirty areas with a soft cloth immersed in neutral detergent or ethanol.
CAUTION
1.
Before measurement, check that the smoothing capacitor is discharged.
2.
At the time of discontinuity, due to the smothing capacitor, the tester may not indicate
∞
. At the time of continuity, the
measured value is several to several ten's-of ohms depending on the module type, circuit tester type, etc. If all measured
values are almost the same, the modules are without fault.
Tester
Polarity
Measured
Value
Tester
Polarity
Measured
Value
Convert
e
r module
D1
R/L1
P/
+
Discontinuity
D4
R/L1
N/
−
Continuity
P/
+
R/L1
Continuity
N/
−
R/L1
Discontinuity
D2
S/L2
P/
+
Discontinuity
D5
S/L2
N/
−
Continuity
P/
+
S/L2
Continuity
N/
−
S/L2
Discontinuity
D3
T/L3
P/
+
Discontinuity
D6
T/L3
N/
−
Continuity
P/
+
T/L3
Continuity
N/
−
T/L3
Discontinuity
In
vert
er module
TR1
U
P/
+
Discontinuity
TR4
U
N/
−
Continuity
P/
+
U
Continuity
N/
−
U
Discontinuity
TR3
V
P/
+
Discontinuity
TR6
V
N/
−
Continuity
P/
+
V
Continuity
N/
−
V
Discontinuity
TR5
W
P/
+
Discontinuity
TR2
W
N/
−
Continuity
P/
+
W
Continuity
N/
−
W
Discontinuity
CAUTION
Do not use solvent, such as acetone, benzene, toluene and alcohol, as they will cause the inverter surface paint to peel off.
Converter module
Inverter module
D1
D2
D3
D4
D5
D6
TR1
TR3
TR5
TR4
TR6
TR2
U
V
W
R/L1
S/L2
T/L3
C
P/+
N
/
−
Содержание FR-F700 Series
Страница 134: ...MEMO ...
