Replace the corresponding current sensor if a reading of
greater than 15 mV occurs. See the disassembly
instructions in chapter 7 Disassembly and Assembly
Instructions.
Table 6.6 and Table 6.7 contain approximate resistance
readings 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
VLT Model
FC 202, FC 102 & FC 103 FC 302
4.6 N110T4 N90kT5
3.8 N132T4 N110T5
3.1 N160T4 N132T5
2.6 N200T4 N160T5
5.1 N250T4 N200T5
4.2 N315T4 N250T5
4.5 P110T4 P90kT5
3.8 P132T4 P110T5
3.1 P160T4 P132T5
2.6 P200T4 P160T5
5.1 P250T4 P200T5
4.2 P315T4 P250T5
2.6 P355T4 P315T5
2.6 P400T4 P355T5
2.3 P450T4 P400T5
4.2 P400T4 P450T5
4.2 P560T4 P500T5
2.6 P630T4 P560T5
2.3 P710T4 P630T5
4.2 P800T4 P710T5
2.6 P1M0T4 P800T5
Table 6.6 Scaling Resistance 380–500 V
Scaling Resistance
Measured in Ω
VLT Model
FC 202, FC 102 & FC 103 FC 302
5.9 N75kT7 N55kT7
5.9 N90kT7 N75kT7
5.9 N110T7 N90kT7
5.9 N132T7 N110T7
5.0 N160T7 N132T7
4.0 N200T7 N160T7
3.2 N250T7 N200T7
2.7 N315T7 N250T7
5.6 N400T7 N315T7
5.9 P45kT7 P37kT7
5.9 P55kT7 P45kT7
5.9 P75kT7 P55kT7
5.9 P90kT7 P75kT7
5.9 P110T7 P90kT7
5.9 P132T7 P110T7
4.5 P160T7 P132T7
3.1 P200T7 P160T7
3.1 P250T7 P200T7
2.6 P315T7 P250T7
5.1 P400T7 P315T7
4.5 P450T7 P355T7
4.5 P500T7 P400T7
3.8 P560T7 P500T7
2.6 P630T7 P560T7
4.5 P710T7 P630T7
3.8 P800T7 P710T7
2.6 P900T7 P800T7
4.5 P1M0T7 P900T7
3.8 P1M2T7 P1M0T7
2.6 P1M4T7 P1M2T7
Table 6.7 Scaling Resistance 525–690 V
6.4.13
Fan Tests
All fan tests can be performed with the unit powered from
the AC line power or with the power card powered in split
bus mode. Any time a fan is commanded to start, the
control card checks the fan feedback signal. If the feedback
is missing, the adjustable frequency drive issues an alarm
or warning based on which fan feedback is missing.
Mixing Fan
The mixing fan should operate any time the adjustable
frequency drive is powered up. If the adjustable frequency
drive is powered and the mixing fan is not running,
replace the mixing fan.
Test Procedures
Service Manual
MG94A222 Danfoss A/S © Rev. 2014-02-10 All rights reserved. 87
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