Danfoss CDS 302 - Default Chapter; Table of Contents

Introduction .........................................................................................................................................4
For Your Safety .....................................................................................................................................5
Diagnostics...........................................................................................................................................6
Initial Trouble Shooting (visual inspection of the installation) .......................................................7
Input power wiring ................................................................................................................................................................................... 7
Output to motor ........................................................................................................................................................................................ 7
Grounding .................................................................................................................................................................................................... 7
Control wiring ............................................................................................................................................................................................. 7
Programming .............................................................................................................................................................................................. 7
Compressor Motor .................................................................................................................................................................................... 7
Cable routing .............................................................................................................................................................................................. 7
Peripheral equipment (sensors, contactors, etc) ............................................................................................................................ 7
Trip on over Temperature ....................................................................................................................................................................... 7
Drive interior ............................................................................................................................................................................................... 7
EMC Precautions ........................................................................................................................................................................................ 7
Vibration ....................................................................................................................................................................................................... 7
Environmental conditions ...................................................................................................................................................................... 7
Proper clearance ........................................................................................................................................................................................ 7
Trouble shooting ................................................................................................................................8
Fault Symptoms - Display of the drive .............................................................................................................................................. 8
No display (blank display) ...................................................................................................................................................................... 8
Intermittent display .................................................................................................................................................................................. 8
Fault Symptoms in the compressor (motor) .................................................................................................................................... 9
Common drives and motor problems ..............................................................................................11
Control logic problems ..........................................................................................................................................................................11
Programming problems ........................................................................................................................................................................11
IGBT, Motor or load problems ............................................................................................................................................................12
Procedure to conduct the dynamic test to check the IGBT .....................................................................................................12
Faults in the drive ....................................................................................................................................................................................12
EMC - Electro Magnetic Compatibility ............................................................................................................................................. 13
Static test procedures .......................................................................................................................14
Rectier test (static) ................................................................................................................................................................................14
IGBT static test ..........................................................................................................................................................................................15
Content
3FRCC.PC.036.A2.02
Check List