Danfoss VLT AAF006

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Special Test Equipment VLT Advanced Active Filter AAF006 D and E Frames Service Manual

9-6 MG90Z122 - VLT

is a registered Danfoss trademark

Main Page

Table of Contents2
Introduction8
VLT Active Filter Product Overview8
For Your Safety8
Warnings8
Electrostatic Discharge (ESD)8
Frame Size Definitions9
Rating Tables10
Fuses11
Current Transducers11
General Torque Tightening Values12
Tools Required12
Exploded Views13
Exploded Views E-Frame13
Operator Interface and Active Filter Control14
Introduction14
User Interface14
LCP Layout14
Setting LCP Display Values15
Display Menu Keys15
Navigation Keys16
Operation Keys16
Tips and Tricks17
Status Messages17
Status Message Definitions17
Service Functions18
Filter Inputs and Outputs18
Current Transformers18
Filter CT Input18
External CT Input18
Control Wiring Input/Output20
Serial Communication Wiring20
Relay Options21
Control Terminals21
Control Terminal Functions22
Grounding Shielded Control Cables24
Internal Active Filter Operation26
General26
Control Card26
Active Filter Card27
Control to Power Interface27
Filter Power Section28
Additional Circuitry28
AC Contactor28
Soft Charge Circuit28
Additional Thermal Protection29
Current Transducers29
Cooling Fans29
Fan Speed Control29
Low Harmonic Drive30
Troubleshooting32
Troubleshooting Tips32
Fault Symptom Troubleshooting32
Visual Inspection33
Fault Symptoms34
No Display34
Intermittent Display34
Warning/Alarm Messages35
Warning/Alarm Code List35
After Repair Tests43
Active Filter and the Power Grid44
Grid Variations44
Grid Configurations44
Grid Impedance44
Voltage Pre-Distortions44
Basic Troubleshooting Background44
Line Phase Loss and Unbalanced Phase Trips44
Voltage Dips and Flickers44
Compatibility with Other Equipment on the same Line Power45
Line Power Resonances45
Control Logic Problems45
Programming Problems46
Internal Active Filter Problems46
Overtemperature Faults46
Current Feedback Problems46
Noise on CT Input47
Effect of EMI47
Test Procedures48
Introduction48
Tools Required for Testing49
Signal Test Board49
Static Test Procedures49
Inverter Section Tests49
Inverter Test Part I49
Inverter Test Part49
Inverter Test Part50
Gate Resistor Test50
Intermediate Section Tests50
Heatsink Temperature Sensor Test51
Fan Continuity Tests51
Fan Fuse Test51
Ohm Test of Transformer51
Ohm Test of Fans51
AC Line Power Contactor and Soft Charge Contactor Tests52
Dynamic Test Procedures52
No Display Test52
Input Voltage Test52
Control Card Basic Voltage Test53
Switch Mode Power Supply (SMPS) Test53
Current Sensors Test CT1, CT2, CT354
Input Terminal Signal Tests54
Line Power Resonance Test55
Control Card Digital Inputs/Outputs Test55
After Repair Tests55
Frame Sizes Disassembly and Assembly Instructions58
Electrostatic Discharge (ESD)58
Passive Section (Top) Instructions59
Control Card and Control Card Mounting Plate60
MG90Z122 - VLT ® Is a Registered Danfoss Trademark60
Control Assembly Support Bracket60
Active Filter Card60
Power Card61
Power Card Mounting Plate62
AC Capacitors63
AC Capacitor Current Sensor (CT4, CT5, CT6)64
AC Contactors64
Movs65
Discharge Card65
Soft Charge Resistor65
Active Side (Bottom) Instructions66
Input Terminal Mounting Plate66
Gate Drive Card68
Contactor Transformer68
Common Mode (CM) RFI Filter Card68
Differential Mode (DM) RFI Filter Card69
Capacitor Bank Assembly69
IGBT Modules70
IGBT Current Sensors CT1, CT2, and CT371
Damping Resistors71
Fan Transformer71
Fan71
Frame Sizes Disassembly and Assembly Instructions72
Electrostatic Discharge (ESD)72
Passive Section (Top) Instructions73
Control Card and Control Card Mounting Plate74
Soft Charge Resistor81
Active Section (Bottom) Instructions81
Input Terminal Mounting Plate81
Gate Drive Card Mounting Plate83
Gate Drive Card83
Upper Capacitor Bank Assembly84
Lower Capacitor Bank Assembly85
IGBT Modules86
IGBT Current Sensors CT1, CT2, and CT388
Fan Transformer89
Fan89
Damping Resistors89
Special Test Equipment90
Test Equipment90
Signal Test Board (P/N 176F8437)90
Signal Test Board Pin Outs: Description and Voltage Levels90

Danfoss VLT AAF006 - Page 95

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