Intermediate Section 37
Inverter Section 39
Brake Option 41
Cooling Fans 43
Fan Speed Control 43
Load Sharing 44
Specific Card Connections 44
4 Troubleshooting
45
Troubleshooting Tips 45
Exterior Fault Troubleshooting 45
Fault Symptom Troubleshooting 45
Visual Inspection 46
Fault Symptoms 47
No Display 47
Intermittent Display 47
Motor Will not Run 48
Incorrect Motor Operation 49
Warning/Alarm List 54
After Repair Tests 60
5 Frequency Converter and Motor Applications
61
Torque Limit, Current Limit, and Unstable Motor Operation 61
Overvoltage Trips 62
Mains Phase Loss Trips 62
Control Logic Problems 63
Programming Problems 63
Motor/Load Problems 63
Internal Frequency Converter Problems 64
Overtemperature Faults 64
Open (Blown) Fuses 64
Current Sensor Faults 65
Electromagnetic Interference 65
Effect of EMI 65
Sources of EMI 66
EMI Propagation 67
Preventive Measures 69
Proper EMC Installation 70
6 Test Procedures
71
Introduction 71
Tools Required for Testing 71
High Power Service Manual for Unit Sizes 6x
2
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