Danfoss VLT FC Series, Service Manual

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Replace the corresponding current sensor if the reading is
greater than 15 mV.
Table 8.8 and Table 8.9 list approximate resistance readings
for individual D-sized units based on power and voltage
rating, and the current scaling card.
Table 8.10 through
Table 8.13 list approximate resistance readings for parallel
drive systems based on power and voltage rating, and the
current scaling card. When measuring with the signal test
board, the reading could be higher due to meter lead
resistance. A reading of no resistance indicates a missing
scaling card.
Scaling resistance
measured in
Ω
Model
FC 102, FC 103, and
FC 202
FC 302
3.8 N55K N45K
3.1 N75K N55K
2.6 N90K N75K
2.6 N110 N90K
5.1 N150 N110
4.2 N160 N150
Table 8.7 Scaling Resistance, D1h–D4h Units, 200–240 V
Scaling resistance
measured in Ω
Model
FC 102, FC 103, and
FC 202
FC 302
4.6 N110 N90k
3.8 N132 N110
3.1 N160 N132
2.6 N200 N160
5.1 N250 N200
4.2 N315 N250
Table 8.8 Scaling Resistance, D1h–D8h Units, 380–480/500 V
Scaling resistance
measured in Ω
Model
FC 102, FC 103, and
FC 202
FC 302
5.9 N75k N55k
5.9 N90k N75k
5.9 N110 N90k
5.9 N132 N110
5.0 N160 N132
4.0 N200 N160
3.2 N250 N200
2.7 N315 N250
5.6 N400 N315
Table 8.9 Scaling Resistance, D1h–D8h Units, 525–690 V
Scaling resistance
measured in Ω
Model Drive modules
FC 102, FC 103,
and FC 202
FC 302
4.2 N500 N450 2-module system
2.6 N560 N500 4-module system
5.1 N630 N560 4-module system
5.1 N710 N630 4-module system
4.2 N800 N710 4-module system
4.2 N1M0 N800 4-module system
Table 8.10 Scaling Resistance, Parallel Drive Systems,
6-pulse, 380–500 V
Scaling resistance
measured in Ω
Model Drive modules
FC 102, FC 103,
and FC 202
FC 302
5.6 N630 N560 2-module system
3.2 N710 N630 4-module system
2.7 N800 N710 4-module system
2.7 N900 N800 4-module system
5.6 N1M0 N900 4-module system
5.6 N1M2 N1M0 4-module system
Table 8.11 Scaling Resistance, Parallel Drive Systems,
6-pulse, 525–690 V
Scaling resistance
measured in Ω
Model Drive modules
FC 102, FC 103,
and FC 202
FC 302
2.6 N315 N250 2-module system
5.1 N355 N315 2-module system
5.1 N400 N355 2-module system
4.2 N450 N400 2-module system
4.2 N500 N450 2-module system
2.5 N560 N500 4-module system
5.1 N630 N560 4-module system
5.1 N710 N630 4-module system
4.2 N800 N710 4-module system
4.2 N1M0 N800 4-module system
Table 8.12 Scaling Resistance, Parallel Drive Systems,
12-pulse, 380–500 V
Test Procedures Service Guide
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