User`s manual

7-5
7
Maintenance and Inspection
7. Maintenance and Inspection
Tester polarity *1
Reading
(red) (black)
Converter
D1
L1 (+)1 Non-conducting
(+)1 L1 Conducting
D2
L2 (+)1 Non-conducting
(+)1 L2 Conducting
D3
L3 (+)1 Non-conducting
(+)1 L3 Conducting
D4
L1 (
−
) Conducting
(
−
) L1 Non-conducting
D5
L2 (
−
) Conducting
(
−
) L2 Non-conducting
D6
L3 (
−
) Conducting
(
−
) L3 Non-conducting
Inverter
TR1
U (+) Non-conducting
(+) U Conducting
TR2
V (+) Non-conducting
(+) V Conducting
TR3
W (+) Non-conducting
(+) W Conducting
TR4
U (−) Conducting
(−) U Non-conducting
TR5
V(
−
) Conducting
(
−
) V Non-conducting
TR6
W (−) Conducting
(−) W Non-conducting
BR section
TR7
RB (+) Non-conducting
(+) RB Conducting
RB (−) Non-conducting
(
−
) RB Non-conducting
(+)1
(+)
RB
U
V
W
TR1
D1
D2
D3
L1
L2
L3
TR7
C
TR2 TR3
D4
D5
D6
TR4
(–)
TR6
TR5
+
Inverter
Converter
*1:
Tester polarity may have to be reversed
depending on the tester or multimeter type.