Danfoss VLT Series Service Manual page 4

3.3 WARNING AND ALARM MESSAGES ............................................................................................... 3-6
3.4 AFTER REPAIR TESTS .................................................................................................................. 3-13
SECTION 4 DRIVE AND MOTOR APPLICATIONS ............................................................................... 4-1
Torque Limit, Current Limit, and Unstable Motor Operation ............................................................. 4-1
Overvoltage Trips ......................................................................................................................... 4-2
Mains Phase Loss Trips ................................................................................................................ 4-2
Control Logic Problems ................................................................................................................. 4-3
Programming Problems ................................................................................................................. 4-3
Motor/Load Problems .................................................................................................................... 4-3
INTERNAL DRIVE PROBLEMS .............................................................................................................. 4-4
Overtemperature Faults ................................................................................................................. 4-4
Current Sensor Faults ................................................................................................................... 4-4
Signal and Power Wiring Considerations for Drive Electromagnetic Compatibility ............................ 4-5
Effects of EMI ................................................................................................................................. 4-5
Sources of EMI ............................................................................................................................. 4-5
EMI Propagation ........................................................................................................................... 4-6
Preventative Measures ................................................................................................................. 4-7
Proper EMC Installation ................................................................................................................. 4-8
SECTION 5 TEST PROCEDURES ........................................................................................................ 5-1
INTRODUCTION .................................................................................................................................... 5-1
TOOLS REQUIRED FOR TESTING ........................................................................................................ 5-1
Signal Test Board .......................................................................................................................... 5-1
Test Cable ..................................................................................................................................... 5-1
5.0 TEST PROCEDURES ...................................................................................................................... 5-2
5.1 STATIC TEST PROCEDURES ......................................................................................................... 5-2
5.1.1 Soft Charge and Rectifier Circuits Test: D-frame Size ............................................................ 5-3
5.1.2 Soft Charge Rectifier Test: D-frame Size .............................................................................. 5-5
5.1.3 Soft Charge and Rectifier Circuits Test: E-frame Sizes .......................................................... 5-6
5.1.4 Soft Charge Rectifier Test: E-frame Size ............................................................................... 5-8
5.1.5 Inverter Section Tests .......................................................................................................... 5-9
5.1.6 Brake IGBT Test ................................................................................................................. 5-10
5.1.7 Intermediate Section Tests ...................................................................................................5-10
5.1.8 Heatsink Temperature Sensor Test .....................................................................................5-10
5.1.9 Fan Continuity Tests: D-frame Size .................................................................................... 5-11
5.1.10 Fan Continuity Tests: E-frame Sizes ................................................................................. 5-12
5.2 DYNAMIC TEST PROCEDURES .................................................................................................... 5-13
5.2.1 No Display Test .................................................................................................................. 5-14
5.2.1.1 Input Voltage Test ............................................................................................................ 5-14
5.2.1.2 Basic Control Card Voltage Test .......................................................................................5-14
5.2.2 Switch Mode Power Supply (SMPS) Test ...........................................................................5-15
5.2.3 Zero DC Bus Voltage Test .................................................................................................. 5-15
5.2.4 DC Under Voltage Test ....................................................................................................... 5-16
5.2.5 Input Phase Imbalance Test ................................................................................................ 5-16
5.2.6 Input Waveform Test ........................................................................................................... 5-17
5.2.7 Input SCR Test ................................................................................................................... 5-19
5.2.8 Output Phase Imbalance Test .............................................................................................. 5-20
5.2.9 IGBT Gate Drive Signals Test ............................................................................................. 5-21
5.2.10 IGBT Switiching Test ......................................................................................................... 5-24
5.2.11 Brake IGBT Test ...............................................................................................................5-24
5.2.12 Current Sensors Test ........................................................................................................5-25
5.2.13 Fan Tests .........................................................................................................................5-26
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