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Jason JacobsSep 7, 2025
What causes a reversed tach fault in Magnetek DSD 412?
- JJames AtkinsSep 7, 2025
Reverse connections for A and A/NOT.
What causes a reversed tach fault in Magnetek DSD 412?
Reverse connections for A and A/NOT.
Why does my Magnetek DC Drives show excessive field current?
If your Magnetek DC drive shows an excessive field current, there are several potential causes: * A partially shorted motor field coil. * Incorrect data entry leading to an unstable motor field current regulator. * Mis-wiring of module A3. * Incorrect current tap setting at A3, TB4, or A3 SW1. * Malfunction of the motor field power circuit. To address these, check the motor field, review and verify settings for parameters #49, 50, 51, 52, 54, and 55, verify correct phasing, verify the current tap setting, and check module A3.
What to do if Magnetek DC Drives show blown fuse fault?
If your Magnetek DC Drive displays a blown fuse fault, start by checking for blown line fuses. If the fuses are intact, verify that AC input voltage is present at the drive.
What to do if my Magnetek Elevators have motor field current that does not reduce to near zero within 6 seconds?
Provide correct single phase supply wiring per connections shown in Figure 9 of this manual, if there is incorrect phasing of Vac supply to field control module. If the SCR/Rectifier power module for motor field is faulty, replace it.
What to do if my Magnetek Elevators have repeated false over- temperature indications?
Replace failing thermistor and/or thermostats.
What does a line voltage setting fault mean on Magnetek DSD 412?
This fault is declared if a number is entered for the Rated Line Voltage, #9 that is outside the acceptable range of 150 to 525VAC.
What to do if Magnetek Elevators display a PCU Reset?
Verify that the correct PCU software and revision level is being used. Check for potential issues with the main circuit card hardware, external noise interference, and proper equipment and signal grounding connections. If the problem persists, consider replacing the Drive Control PCB.
What to do if Magnetek DSD 412 display a safety circuit fault?
Check for intermittent connections in the Safety Chain.
What to do if my Magnetek DSD 412 have a loss of stored parameter data?
Remember to SAVE the data when parameters are changed.
How to troubleshoot serial communication fault on Magnetek DC Drives?
For a serial communication fault on Magnetek DC Drives, ensure that the host is connected and sending valid messages. Also, look for and correct any electrical grounding noise interference problems.
Overview of the DSD 412 digital system drive and its configuration.
Details of the SCDU for setup, operation, and diagnostics.
Features and functions of the optional PCDU for advanced diagnostics.
Key electrical and operational specifications of the DSD 412 drive.
Key electrical and performance characteristics of the drive.
Environmental and power requirements for proper drive operation.
Built-in safety and protection mechanisms for the drive.
Overview of key hardware components like PCBs and their functions.
Details of the power supply PCB functions and connections.
Functions of the armature interface circuitry for SCR gating.
Types of SCRs used based on drive horsepower ranges.
Interface circuitry for field current control and feedback.
Components mounted on the snubber PCB for SCR protection.
PCB housing microprocessors and support circuits for drive control.
Details of the DCU microprocessor, memory, and programming.
Details of the PCU microprocessor, memory, and instructions.
Input/output connections for elevator applications.
Operator controls and indicators located on the drive's front panel.
Function and operation of the drive reset button.
Description of the drive status indicator LEDs.
Details of the SCDU display, buttons, and operation.
Explanation of NVRAM protection and its switch.
Initial checks and preparations required before installing the drive.
Procedures for inspecting and reporting damages upon equipment receipt.
Steps for safely removing equipment from packaging.
Guidelines for packaging equipment for storage or transport.
Mounting the drive in a clean, ventilated location.
Guidance on choosing, installing, and connecting encoders for speed feedback.
Criteria for selecting a suitable encoder for speed feedback.
Proper mounting techniques and alignment for encoder installation.
Importance of using a quality coupling for encoder shaft connections.
Recommended wiring practices for encoder signal connections.
Ensuring proper wiring and disconnect devices conform to codes.
Guidelines for connecting the three-phase input power to the drive.
Recommendations for running low-voltage signal wiring separately.
Proper grounding procedures for the drive and connected system.
Essential checks to perform before applying input power to the drive.
Step-by-step observation of the drive's power-up process via SCDU.
Troubleshooting common display issues during drive start-up.
Verifying the operation of the drive's cooling fans.
Steps to check and set drive parameters for the specific application.
Purpose and location of the Standard Control/Display Unit (SCDU).
Initial drive power-up sequence and display indicators.
Steps to modify drive parameters using the SCDU interface.
How to display monitored drive values on the SCDU.
Methods the drive uses to report errors and faults.
Function for managing fault and error disposition lists.
How to view and clear recorded drive faults from the Fault List.
Storing and viewing recent drive errors in the Error List.
Function for viewing the drive's Error List.
Procedures for saving and restoring drive parameters in NVRAM.
Restoring factory default parameter settings for the drive.
Using the drive's self-tuning feature for motor parameter measurement.
Impact of ripple filters on self-tune test performance.
Built-in diagnostic routines for testing the PCU.
Overview of DSD 412 software features for elevators and lifts.
How the drive manages motor field current for optimal operation.
Analog follower, preset speeds, serial link, pre-torque, and ramp-down.
Overload, fault reset, ARB, DSPR, brake control, and over-speed test features.
Detailed descriptions of drive setup adjustment functions.
Functions for current, resistance, inductance, voltage, and speed settings.
Functions for bandwidth, inertia, stiffness, and scaling.
Functions for brake timing, DSPR, speed selection, and ARB modes.
Functions for reference modes, jerk abort, feedback, and output selects.
Functions controlling ramp times and S-curve shaping.
Descriptions of various functions for logic outputs A through L.
How to display monitored drive values on the SCDU.
Field regulator, AC voltage, and speed regulator setup.
Tuning E-Reg, inertia, stiffness, and gain settings.
Using notch filter and configuring motor overload protection.
Sticking brake detection and elevator start/stop sequences.
Preset speed logic, external commands, and serial communication.
List of custom DCU, DRIVE, and PCU errors with their codes.
Troubleshooting steps when no display is shown on power-up.
Causes and solutions for lost parameter data.
Diagnosing false blown fuse indications.
Troubleshooting repeated false over-temperature warnings.
Routine inspection and cleaning procedures for the drive.
General procedures for replacing parts and components.
Handling and replacement of PCBs and ICs, including ESD precautions.
Details for replacing ICs, EPROMs, NVRAM, fuses, and PCBs.
Testing and replacing power semiconductors, snubber components, and field control modules.
Procedures for testing and replacing SCR devices using a multimeter.
Replacing cooling fans, thermistors, transducers, and SCR power bridges.
Servicing snubber capacitor and resistor components.
Using PCU diagnostics and ohmmeter testing for SCRs.
Step-by-step ohmmeter testing of SCRs for shorts and open circuits.
Steps for removing and reinstalling the Armature Interface PCB.
Overview of the DSD 412 digital system drive and its configuration.
Details of the SCDU for setup, operation, and diagnostics.
Features and functions of the optional PCDU for advanced diagnostics.
Key electrical and operational specifications of the DSD 412 drive.
Key electrical and performance characteristics of the drive.
Environmental and power requirements for proper drive operation.
Built-in safety and protection mechanisms for the drive.
Overview of key hardware components like PCBs and their functions.
Details of the power supply PCB functions and connections.
Functions of the armature interface circuitry for SCR gating.
Types of SCRs used based on drive horsepower ranges.
Interface circuitry for field current control and feedback.
Components mounted on the snubber PCB for SCR protection.
PCB housing microprocessors and support circuits for drive control.
Details of the DCU microprocessor, memory, and programming.
Details of the PCU microprocessor, memory, and instructions.
Input/output connections for elevator applications.
Operator controls and indicators located on the drive's front panel.
Function and operation of the drive reset button.
Description of the drive status indicator LEDs.
Details of the SCDU display, buttons, and operation.
Explanation of NVRAM protection and its switch.
Initial checks and preparations required before installing the drive.
Procedures for inspecting and reporting damages upon equipment receipt.
Steps for safely removing equipment from packaging.
Guidelines for packaging equipment for storage or transport.
Mounting the drive in a clean, ventilated location.
Guidance on choosing, installing, and connecting encoders for speed feedback.
Criteria for selecting a suitable encoder for speed feedback.
Proper mounting techniques and alignment for encoder installation.
Importance of using a quality coupling for encoder shaft connections.
Recommended wiring practices for encoder signal connections.
Ensuring proper wiring and disconnect devices conform to codes.
Guidelines for connecting the three-phase input power to the drive.
Recommendations for running low-voltage signal wiring separately.
Proper grounding procedures for the drive and connected system.
Essential checks to perform before applying input power to the drive.
Step-by-step observation of the drive's power-up process via SCDU.
Troubleshooting common display issues during drive start-up.
Verifying the operation of the drive's cooling fans.
Steps to check and set drive parameters for the specific application.
Purpose and location of the Standard Control/Display Unit (SCDU).
Initial drive power-up sequence and display indicators.
Steps to modify drive parameters using the SCDU interface.
How to display monitored drive values on the SCDU.
Methods the drive uses to report errors and faults.
Function for managing fault and error disposition lists.
How to view and clear recorded drive faults from the Fault List.
Storing and viewing recent drive errors in the Error List.
Function for viewing the drive's Error List.
Procedures for saving and restoring drive parameters in NVRAM.
Restoring factory default parameter settings for the drive.
Using the drive's self-tuning feature for motor parameter measurement.
Impact of ripple filters on self-tune test performance.
Built-in diagnostic routines for testing the PCU.
Overview of DSD 412 software features for elevators and lifts.
How the drive manages motor field current for optimal operation.
Analog follower, preset speeds, serial link, pre-torque, and ramp-down.
Overload, fault reset, ARB, DSPR, brake control, and over-speed test features.
Detailed descriptions of drive setup adjustment functions.
Functions for current, resistance, inductance, voltage, and speed settings.
Functions for bandwidth, inertia, stiffness, and scaling.
Functions for brake timing, DSPR, speed selection, and ARB modes.
Functions for reference modes, jerk abort, feedback, and output selects.
Functions controlling ramp times and S-curve shaping.
Descriptions of various functions for logic outputs A through L.
How to display monitored drive values on the SCDU.
Field regulator, AC voltage, and speed regulator setup.
Tuning E-Reg, inertia, stiffness, and gain settings.
Using notch filter and configuring motor overload protection.
Sticking brake detection and elevator start/stop sequences.
Preset speed logic, external commands, and serial communication.
List of custom DCU, DRIVE, and PCU errors with their codes.
Troubleshooting steps when no display is shown on power-up.
Causes and solutions for lost parameter data.
Diagnosing false blown fuse indications.
Troubleshooting repeated false over-temperature warnings.
Routine inspection and cleaning procedures for the drive.
General procedures for replacing parts and components.
Handling and replacement of PCBs and ICs, including ESD precautions.
Details for replacing ICs, EPROMs, NVRAM, fuses, and PCBs.
Testing and replacing power semiconductors, snubber components, and field control modules.
Procedures for testing and replacing SCR devices using a multimeter.
Replacing cooling fans, thermistors, transducers, and SCR power bridges.
Servicing snubber capacitor and resistor components.
Using PCU diagnostics and ohmmeter testing for SCRs.
Step-by-step ohmmeter testing of SCRs for shorts and open circuits.
Steps for removing and reinstalling the Armature Interface PCB.
General