Danfoss VLT AAF006 Service Manual
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Danfoss VLT AAF006 Service Manual

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MAKING MODERN LIVING POSSIBLE
®
VLT
Advanced Active Filter
AAF006 D and E Frame
Service Manual

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Summary of Contents for Danfoss VLT AAF006

  • Page 1 MAKING MODERN LIVING POSSIBLE ® Advanced Active Filter AAF006 D and E Frame Service Manual...

  • Page 2: Table Of Contents

    2.5.2 Filter CT Input 2.5.2.1 External CT Input 2.5.3 Control Wiring Input/Output 2.5.4 Serial Communication Wiring 2.5.5 Relay Options 2.6 Control Terminals 2.7 Control Terminal Functions 2.8 Grounding Shielded Control Cables 2-11 ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 3 5.2.1 Line Phase Loss and Unbalanced Phase Trips 5.2.2 Voltage Dips and Flickers 5.2.3 Compatibility with Other Equipment on the Same Line Power 5.2.4 Line Power Resonances 5.2.5 Control Logic Problems 5.2.6 Programming Problems ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 4 6.3.8 Control Card Digital Inputs/Outputs Test 6.4 After Repair Tests 7 D-Frame Sizes Disassembly and Assembly Instructions 7.1 Electrostatic Discharge (ESD) 7.2 Passive Section (Top) Instructions 7.2.1 Control Card and Control Card Mounting Plate ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 5 8.2.7 AC Capacitor Current Sensor (CT4, CT5, CT6) 8.2.8 AC Contactors 8.2.9 Common Mode (CM) RFI Filter Card 8-10 8.2.10 Differential Mode (DM) RFI Filter Card 8-10 8.2.11 MOVs 8-10 8.2.12 Discharge Card 8-10 ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 6 8-18 8.3.9 Fan 8-18 8.3.10 Damping Resistors 8-18 9 Special Test Equipment 9.1 Test Equipment 9.1.1 Signal Test Board (p/n 176F8437) 9.1.2 Signal Test Board Pin Outs: Description and Voltage Levels ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 7 Contents VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 8: Introduction

    AAF, or completely destroy sensitive electronic components. Active filters contain dangerous voltages when connected to line power. The connected current transducers may also hold dangerous voltages when connected. Only a competent technician should carry out service. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 9: Frame Size Definitions

    40.16 [1020] 68.5 [1740] 19.69 [500] 23.62 [600] 78.74 [2000] 19.69 [500] 47.24 [1200] 78.74 [2000] 23.62 [600] 110.24 [2800] 86.61 [2200] Table 1.2 Dimensions Filters are available in IP21 and IP54. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 10: Rating Tables

    221° F [105° C] Damping resistor heatsink over-temperature trip 239° F [115° C] Power card over-temperature 154.4° F [68° C] Power card under-temperature -4° F [-20° C] Ground fault alarm Table 1.4 Trip Points ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 11: Fuses

    Adjustable frequency drive.) Three other current Current External current transformer transducers in the LCL filter section are used for overload Transformer protection for the AC capacitors and damping resistors. Table 1.6 Current Transducers ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 12: General Torque Tightening Values

    Clamp-on style amp meter Signal test board (p/n 176F8437) and extension board (p/n 130B3147) Split-bus power supply (p/n 130B3146) Power quality analyses Fluke 435 (p/n 130BB3173), Dranetz 4300, 4400, or similar Table 1.9 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 13: Exploded Views

    DC link inductor LCL capacitors CT connection terminals LCL capacitor current sensor DC link inductor Soft charge resistors, MOV, discharge card, and fuse assembly DC link inductor Bus bar retaining nut Table 1.10 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 14: Operator Interface And Active Filter Control

    (see 2.2.2 Setting LCP Display Values). • Programming active filter functions Status line displays filter-generated status messages (see 2.3.1 Status Messages). • Manually reset the active filter after a fault when auto-reset is inactive ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 15: Setting Lcp Display Values

    • For details about the active filter before it entered the alarm mode, select the alarm number using the navigation keys and press [OK]. Table 2.2 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 16: Navigation Keys

    WARN light comes on and text appears in the display area identifying the problem. ALARM A fault condition causes the red alarm light to flash and an alarm text is displayed. Table 2.4 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 17: Tips And Tricks

    This puts the filter in trip mode and can be reset as described. Table 2.6 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 18: Service Functions

    AAF monitors harmonics of the IGBT output along with current transformers when current is present on the the LCL capacitor banks. primary side and the AFC card is NOT connected could damage the current transformer. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 19 CTs are part of standard range. Figure 2.9 Auto CT Detection Unsuccessful Auto CT Detection can indicate an incorrect CT installation. Check the CT installation and program the CTs by hand. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 20: Control Wiring Input/Output

    The active filter supports the following. connections • 3 inputs (terminal 18, 19, 20) • 2 programmable in/output (terminal 27, 29) External control signals are all wired to the FCA terminal MK102. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 21: Relay Options

    (+) 68 and (-) 69. Terminal 61 is common and may be used for terminating shields only when the control cable run between Danfoss filters or between filters and Danfoss adjustable frequency drives. Do not use the common shield between filters and other devices.

  • Page 22: Control Terminal Functions

    Control terminals must be programmed. Each control terminal has specific functions it is capable of performing and associated parameter. The setting selected in the parameter enables the function of the terminal. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 23 24V (NPN) 0V (PNP) +24V 24V (NPN) 0V (PNP) +24V 24V (NPN) 0V (PNP) 24V (NPN) 0V (PNP) 24V (NPN) 0V (PNP) MK108 (1A) MK101 (5A) Figure 2.14 AFC Card Connections ® 2-10 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 24: Grounding Shielded Control Cables

    61. This terminal connects to ground through an internal RC link. It is recommended to use twisted-pair cables to reduce the differential mode interference between conductors. Table 2.11 Grounding Shielded Control Cables ® MG90Z122 - VLT is a registered Danfoss trademark 2-11...
  • Page 25 Operator Interface and Acti... VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® 2-12 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 26: Internal Active Filter Operation

    EEPROM which provides security backup parameter set. It can also download programming during power-down. to the filter to restore programming to a repaired unit, or to program multiple units by downloading from a ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 27: Active Filter Card

    The gate signals from the control card to the transistors (IGBTs) are isolated and buffered on the gate drive card. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 28: Filter Power Section

    Table 3.3 Soft Charge Electrical Characteristics When the line power contactor is open, active filter control is maintained by the soft charge circuit. The status of the main contactors is monitored via an auxiliary contact ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 29: Additional Thermal Protection

    Transformer Table 3.7 Control Card Thermal Sensor Table 3.4 Current Transducers Current value. If the current injection is greater than 60% of rated current, the fan will turn on low speed. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 30: Low Harmonic Drive

    Figure 3.3 LHD Internal Circuitry Line power option plate Power module HI (Lm) reactor DC capacitors Line power contactor Damping resistors Power card AC capacitor Inverter side reactor (Lc) Adjustable frequency drive interconnect Table 3.8 ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 31 Internal Active Filter Oper... VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 32: Troubleshooting

    When in doubt, consult the factory or authorized repair center for assistance. The After Repair Tests should always be performed following a repair to the filter. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 33: Visual Inspection

    • Check for cracks or breaks in the housings of power semiconductors and loose pieces of broken component housings inside the unit. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 34: Fault Symptoms

    (external to the filter). All control wiring should be checked for shorts or incorrect connections. If the display continues to cut out, follow the procedure for No Display as though the display were not lit at all. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 35: Warning/Alarm Messages

    Alarms must be reset to restart operation once their cause has been rectified. This may be done in three ways: Pressing the [reset] button on the LCP. A digital reset input. Serial communication reset signal. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 36 Illegal PS config Drive initialized to default value New spare part New type code Mains contactor fault Capacitor overcurrent Capacitor ground fault DC overcurrent Mains frequency limit Compensation limit Resistor temperature ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 37 The limit is dependent on the filter connected, the filter trips after a fixed time delay. The time voltage rating. The unit is still active. delay varies with unit size. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 38 The regulated voltage to the fans is monitored. 15-41 Power Section Troubleshooting: • Check fan fuse 15-42 Voltage • Check fan resistance (see 6.2.5 Fan Continuity 15-43 Software Version Tests). 15-45 Actual Typecode String ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 39 Check for loose or missing wiring WARNING 41, Overload of digital output terminal 29 It may be necessary to contact your Danfoss supplier or Check the load connected to terminal 29 or remove short- service department. Note the code number for further circuit connection.
  • Page 40 The scaling card is the incorrect part number or not 24 V DC backup power supply may be overloaded, installed. Also MK102 connector on the power card could otherwise contact your Danfoss supplier. not be installed. WARNING 48, 1.8V supply low ALARM 80, Drive initialized to default value The 1.8 V DC supply used on the control card is outside of...
  • Page 41 Damaged heatsink fan order to regulate the DC link voltage and inject compen- sating current. The active filter utilizes a phase-locked loop (PLL) to track the AC line voltage frequency. ® 4-10 MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 42 Program the CT parameters manually if auto CT detection fails. ALARM 319, Runaway follower A follower AF was not commanded to run, but the feedback indicates it is running. The report value indicates the follower ID. ® MG90Z122 - VLT is a registered Danfoss trademark 4-11...

  • Page 43: After Repair Tests

    Monitor that the total harmonic current and voltage distortion is reduced. If not, check CT input/installation for faults or configuration errors. Copy parameter settings to the LCP memory 0-50 LCP Copy for backup. ® 4-12 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 44: Active Filter And The Power Grid

    Active filters are suitable for operation under non- • sinusoidal voltages. A total harmonic voltage distortion of ALARM 305, Mains freq. limit up to 10% should not affect the active filter performance. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 45: Compatibility With Other Equipment On The Same Line Power

    If the signal is not present, the problem of the 31st harmonics order. is external to the filter. The circuitry providing the signal along with its associated wiring must then be checked. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 46: Programming Problems

    In the event that an overtemperature indication is displayed, determine whether this condition actually exists within the filter or whether the thermal sensor is defective. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 47: Noise On Ct Input

    • Pressure/flow/temperature signal transmitter signal distortion or aberrant behavior • Radio and TV interference • Telephone interference • Computer network data loss • Digital control system faults ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 48: Test Procedures

    When the AFC card is not connected, the Dynamic tests are performed with power applied to the secondary side must be shorted filter. Dynamic tests are performed with power applied to the adjustable frequency drive. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 49: Tools Required For Testing

    Assembly Instructions or 8 E-Frame Sizes Disassembly and Assembly Instructions. It is further recommended for units with two IGBT modules that both modules be replaced even if the second module tests correctly. Figure 6.2 Signal Test Board ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 50: Inverter Test Part

    Pins 1 and 2 of each connector is fully assembled. Although it is unlikely that a failure within the capacitor bank would not be indicated by a ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 51: Heatsink Temperature Sensor Test

    Read across the fan terminals on each fan. A Checking continuity of connections reading of 400 Ω is expected. Replace any For the following tests, read connector MK107 on the defective fans. power card. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 52: Ac Line Power Contactor And Soft Charge Contactor Tests

    In general, the ohmmeter should measure 1– imbalance of the supply voltage is not more than 3%. 5 M Ω. Low values indicate on coil damaging. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 53: Control Card Basic Voltage Test

    Test Procedures VLT Advanced Active Filter AAF006 D and E Frames Service Manual Danfoss calculates line imbalance per an IEC specification. customer connections. If still unsuccessful, proceed to the SMPS test. Imbalance = 0.67 X (Vmax – Vmin)/Vavg A correct reading of both control card voltages would For example, if three phase readings were taken and the indicate the LCP or the control card is defective.

  • Page 54: Current Sensors Test Ct1, Ct2, Ct3

    Control Card Basic Voltage Test earlier in this section. the filter or a faulty control card. To determine the fault location, use a voltmeter to test for voltage at the control terminals. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 55: Line Power Resonance Test

    AC output filter the following parameters: Location (300-26 CT current indicated on the LCP or by direct Placement), CT Primary Voltage (300-22 CT measurements with a current probe. A high Nominal Voltage). ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 56 Monitor that the total harmonic current and voltage distortion is reduced. If not, check CT input/installation for faults or configuration errors. Copy parameter settings to the LCP memory 0-50 LCP Copy for backup. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 57 Test Procedures VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® 6-10 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 58: Frame Sizes Disassembly And Assembly Instructions

    Refer to the tables in the Introduction section to determine frame size definitions. See for E-frame sizes disassembly and assembly instructions. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 59: Passive Section (Top) Instructions

    Figure 7.1 Control Card and Mounting Plate, Support Bracket, Active Filter Card, and Power Card and Mounting Plate Control card terminal block Control card Power card mounting plate Active filter (AAF) card Power card Control card mounting plate Mounting nut Control card assembly support bracket Table 7.1 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 60: Control Card And Control Card Mounting Plate

    MK101 (5A) or MK108 (1A) from AAF card. Remove AAF card by removing the 4 mounting screws (T-10). Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 61: Power Card

    Power card PCA3 MK106 Mounting plate MK100 MK110 MK109 MK102 FK102 MK104 MK112 terminals 4,5,6 MK105 MK112 terminals 1,2,3 MK107 Current scaling card PCA4 FK103 Current scaling card standoff Table 7.3 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 62: Power Card Mounting Plate

    MK102 attaches to the right mounting stud on the top of the power card mounting plate. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 63: Ac Capacitors

    Reinstall in the reverse order of this procedure. See accordance with the procedure. Table 1.7 for torque tightening values. Remove the nut (0.43 in [11 mm]) from each side of the AC capacitor and the lug wires. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 64: Ac Capacitor Current Sensor (Ct4, Ct5, Ct6)

    Remove the AC contactor by removing the four mounting nuts (0.32 in [8 mm]). Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 65: Movs

    Disconnect MK100 from the discharge card. Remove the discharge card by removing the four screws (T-25). Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 66: Active Side (Bottom) Instructions

    (not shown), three (T-40) screws, and (0.51 in [13 mm]) nuts from the passive side of the unit. Remove input terminal mounting plate by removing eight (0.39 in [10 mm]) retaining nuts from plate. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 67 Cross bus bar terminal Cross bus bar terminal Line power disconnect fuse (optional) Table 7.6 Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® 7-10 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 68: Gate Drive Card

    Remove the input terminal mounting plate in accordance with the procedure. Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. Disconnect CM4 (not shown). ® MG90Z122 - VLT is a registered Danfoss trademark 7-11...

  • Page 69: Differential Mode (Dm) Rfi Filter Card

    (T-30) from the top. NOTE! Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® 7-12 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 70: Igbt Modules

    Current sensor standoff IGBT intermediate bus bar Retaining screw Current sensor bus bar DC bus assembly Current sensor Snubber capacitor Damping resistor Retaining screw Damping resistor bus bar MK100 Table 7.8 ® MG90Z122 - VLT is a registered Danfoss trademark 7-13...

  • Page 71: Igbt Current Sensors Ct1, Ct2, And Ct3

    (T-20) on either side of the damping Table 1.7 for torque tightening values. resistor. Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® 7-14 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 72: Frame Sizes Disassembly And Assembly Instructions

    Frame size is used throughout this manual wherever procedures or components differ between filters based upon the unit's physical size. Refer to 8 E-Frame Sizes Disassembly and Assembly Instructions to determine E-frame size definitions. ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 73: Passive Section (Top) Instructions

    Figure 8.1 Control Card and Mounting Plate, Support Bracket, Power Card and Mounting Plate Control card terminal block Control card Power card mounting plate Active filter (AAF) card Power card Control card mounting plate Mounting nut Control card assembly support bracket Table 8.1 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 74: Control Card And Control Card Mounting Plate

    MK101 (5A) or MK108 (1A) from AAF card. Remove AAF card by removing the 4 mounting screws (T-10). Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 75 Power card PCA3 MK106 Mounting plate MK100 MK110 MK109 MK102 FK102 MK104 MK112 terminals 4,5,6 MK105 MK112 terminals 1,2,3 MK107 Current scaling card PCA4 FK103 Current scaling card standoff Table 8.3 ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 76 MK102 attaches to the right mounting stud on the top of the power card mounting plate. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 77 Remove the nut (0.43 in [11 mm]) from each side of the AC capacitor and the lug wires. Remove the AC capacitor by removing the nut (0.32 in [8 mm]) from each side of the AC capacitor mounting bracket. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 78 E-Frame Sizes Disassembly a... VLT Advanced Active Filter AAF006 D and E Frames Service Manual 8.2.7 AC Capacitor Current Sensor (CT4, CT5, CT6) Figure 8.5 AC capacitor current sensor Retaining nut Table 8.5 ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 79 Remove the nut (0.43 in [11 mm]) from the Reinstall in the reverse order of this procedure. See corresponding capacitor in order to remove the Table 1.7 for torque tightening values. lug cable which goes through the current sensor. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 80 Differential mode RFI card MK106 Discharge card (PCA16) Soft charge resistor Common mode RFI card Fuses (FU6, FU14, FU15) Power card mounting plate Fuses (FU11, FU12, FU13) Auxiliary contactor Table 8.7 ® MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 81: Soft Charge Resistor

    (0.39 in [10 mm]) retaining nuts Remove the MOV by removing the two screws from plate. (T-20) top and bottom. Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® 8-10 MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 82 Cross bus bar terminal Cross bus bar terminal Line power disconnect fuse (optional) Table 8.8 Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® MG90Z122 - VLT is a registered Danfoss trademark 8-11...

  • Page 83: Gate Drive Card Mounting Plate

    Reinstall in the reverse order of this procedure. See the back of the plate on the vertical mounting Table 1.7 for torque tightening values. tabs (not shown). Disconnect cables MK102, MK103, and MK104. ® 8-12 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 84: Upper Capacitor Bank Assembly

    6 electrical connection nuts (0.32 in [8 mm]) for the upper capacitor bank on the DC bus bars. Note that the weight of the capacitor bank is approximately 20 lbs [9 kg]. ® MG90Z122 - VLT is a registered Danfoss trademark 8-13...

  • Page 85: Lower Capacitor Bank Assembly

    Reinstall in the reverse order of this procedure. See the upper and lower capacitor banks. A minimum Table 1.7 for torque tightening values. extension of 6 in [150 mm] is required. Remove ® 8-14 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 86: Igbt Modules

    Top IGBT module retaining screw (step 6) Intermediate IGBT output bus bar retaining nut (step 7) IGBT bus bar assembly Bottom retaining nuts IGBT bus bar assembly (step 4) Table 8.12 ® MG90Z122 - VLT is a registered Danfoss trademark 8-15...
  • Page 87 Note that tightening pattern and torque values described in kit must be complied with. Reassemble the remaining parts in reverse order of their removal. See Table 1.7 for torque tightening values. ® 8-16 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 88: Igbt Current Sensors Ct1, Ct2, And Ct3

    Remove the standoff nuts (0.32 in [8 mm]) from with the procedure. IGBT intermediate bus bar. Remove four screws (T-30) attaching the IGBT Disconnect the current sensor cable (not shown). intermediate bus bars to the IGBT module. ® MG90Z122 - VLT is a registered Danfoss trademark 8-17...

  • Page 89: Fan Transformer

    Remove the damping resistor by removing the screws (T-20) on either side of the damping resistor. Reinstall in the reverse order of this procedure. See Table 1.7 for torque tightening values. ® 8-18 MG90Z122 - VLT is a registered Danfoss trademark...

  • Page 90: Special Test Equipment

    Values are provided for describes when these tests would be called for and what using a digital voltmeter for testing as well. the signal should be at that given test point. ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 91 -18 V DC The red LED indicates voltage is present between VPOS and VNEG -18 V DC regulated supply regulated terminals. -16.5 to 19.5 V DC supply -16.5 to 19.5 V ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 92 - 1 V DC = 450 V DC [T4/T5] - 1 V DC = 610 V DC [T7] +24 V DC Yellow LED indicates voltage is present. +24 V DC regulated supply power supply +23 to 25 V DC ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 93 Equal on all phases 6.00 V phase, TP25-TP30 4.00 negative. Signal 2.00 originates on 0.00 V the control -2.00 card. -4.00 -6.00 -8.00 -4.0ms 50Us/Div 2v/div 100us/div Run@10 Hz ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 94 Equal on all phases TP25-TP30 6.00 W phase, 4.00 negative. Signal 2.00 originates on 0.00 V the control -2.00 card. -4.00 -6.00 -8.00 -4.0ms 50Us/Div 2v/div 100us/div Run@10 Hz Table 9.1 ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 95 Special Test Equipment VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 96 Block Diagrams VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® MG90Z122 - VLT is a registered Danfoss trademark 10-1...
  • Page 97 Block Diagrams VLT Advanced Active Filter AAF006 D and E Frames Service Manual ® 10-2 MG90Z122 - VLT is a registered Danfoss trademark...
  • Page 98 130R0268 MG90Z122 Rev. 2012-04-20 *MG90Z122*...

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