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• Checking the converter module
<Preparation>
(1) Disconnect the external power supply cables (R4, S4, T4, N, P).
(2) Prepare a tester. (Use 1
<Checking method>
Change the polarity of the tester alternately at the main circuit terminals R4, S4, T4, P and N of the converter,
and check for continuity.
Note: 1.Before measurement, check that the smoothing capacitor is discharged.
2.At the time of discontinuity, the measured value indicated is a nearly infinite value. Due to the
influence of the smoothing capacitor, continuity may be instantaneously established and infinite not
indicated. At the time of continuity, the measured value is several to several ten ohms depending
on the module type, 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
R4
D1
P
S4
D2
P
T4
D3
P
R4
D4
N
S4
D5
N
T4
D6
N
(Assumes the use of an analog meter.)
Ω
range.)
Measured
Value
P
Discontinuity
R4
Continuity
P
Discontinuity
S4
Continuity
P
Discontinuity
T4
Continuity
N
Continuity
R4
Discontinuity
N
Continuity
S4
Discontinuity
N
Continuity
T4
Discontinuity
D1
R4
S4
T4
D4
- 48 -
P
D2
D3
C
D5
D6
N
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