Mitsubishi Electric FR-E 500 Instruction Manual page 195

" " " " Checking the inverter and converter modules
<Preparation>
(1)Disconnect the external power supply cables (L
W).
(2)Prepare a meter. (Use 100Ω range.)
<Checking method>
Change the polarity of the meter alternately at the inverter terminals L
U, V, W, + and −, and check for continuity.
Note: 1. Before measurement, check that the smoothing capacitor is discharged.
2. At the time of continuity, the measured value is several to several ten's-of
ohms depending on the number of modules, number of parallel modules,
circuit tester type, etc. If all measured values are almost the same, the
modules are without fault.
<Module device numbers and terminals to be checked>
Tester
Polarity
L
1
D1
+
L
2
D2
+
L
3
D3
+
U
TR1
+
V
TR3
+
W
TR5
+
(Assumes the use of an analog meter.)
Note: The FR-E520S-0.4K to 2.2K do not have L
Measured
Value
+ Discontinuity
L Continuity
1
+ Discontinuity
L Continuity
2
+ Discontinuity
L Continuity
3
+ Discontinuity
U Continuity
+ Discontinuity
V Continuity
+ Discontinuity
W Continuity
Converter module
D1 D2 D3
L
1
L
2
L
3
D4 D5 D6
PROTECTIVE FUNCTIONS
, L , L
1 2
Tester
Polarity
−
L
1
D4
−
L
1
−
L
2
D5
−
L
2
−
L
3
D6
−
L
3
−
U
TR4
−
U
−
V
TR6
−
V
−
W
TR2
−
W
+
Inverter module
TR1 TR3 TR5
C
TR4 TR6 TR2
−
, D3 and D6.
3
179
) and motor cables (U, V,
3
, L , L ,
1 2 3
Measured
Value
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
U
V
W