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Mitsubishi Electric FR-E500 Instruction Manual Page 195

Fr-e500 series transistorized inverter.
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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

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