Mitsubishi Electric FR-E500 Instruction Manual page 195

z Checking the inverter and converter modules
<Preparation>
(1)Disconnect the external power supply cables (R, S, T (L
(U, V, W).
(2)Prepare a meter. (Use 100Ω range.)
<Checking method>
Change the polarity of the meter alternately at the inverter terminals R (L
T (L ), U, V, W, P (+) and N (−), and check for continuity.
3
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
R (L ) P (+)
1
D1
P (+) R (L
S (L ) P (+)
2
D2
P (+) S (L
T (L ) P (+)
3
D3
P (+) T (L
U P (+)
TR1
P (+) U
V P (+)
TR2
P (+) V
W P (+)
TR5
P (+) W
Note: The FR-E510W-0.1K to 0.75K-NA do not have T (L
Measured
Value
Discontinuity
) Continuity
1
Discontinuity
) Continuity
2
Discontinuity
) Continuity
3
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Converter module
D1 D2 D3
R (L )
1
S (L )
2
T (L )
3
D4 D5 D6
PROTECTIVE FUNCTIONS
1
Tester
Polarity
R (L ) N (−)
1
D4
N (−) R (L )
1
S (L ) N (−)
2
D5
N (−) S (L )
2
T (L ) N (−)
3
D6
N (−) T (L )
3
U N (−)
TR4
N (−) U
V N (−)
TR6
N (−) V
W N (−)
TR2
N (−) W
Inverter module
P (+)
TR1 TR3 TR5
C
TR4 TR6 TR2
N (-)
), D3 and D6.
3
179
, L , L )) and motor cables
2 3
), S (L
1
Measured
Value
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
Continuity
Discontinuity
U
V
W
),
2