Danfoss VLT HVAC Drive FC100, Руководство по обслуживанию

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2.8 Earthing Screened Cables 47
3 Internal Frequency Converter Operation
48
3.1 General 48
3.2 Description of Operation 48
3.2.1 Logic Section 48
3.2.2 Logic to Power Interface 49
3.2.3 Power Section 50
3.3 Sequence of Operation 51
3.3.1 Rectifier and Option Cabinet 51
3.3.2 Intermediate Section 53
3.3.3 Inverter Section 54
3.3.4 Brake Option 56
3.3.5 Cooling Fans 57
3.3.6 Fan Speed Control 57
3.3.7 Load Sharing 57
3.3.8 Specific Card Connections 58
4 Troubleshooting
59
4.1 Troubleshooting Tips
59
4.2 Exterior Fault Troubleshooting
59
4.3 Fault Symptom Troubleshooting
59
4.4 Visual Inspection
61
4.5 Fault Symptoms
62
4.5.1 No Display 62
4.5.2 Intermittent Display 62
4.5.3 Motor Will not Run 62
4.5.4 Incorrect Motor Operation 62
4.6 Alarms and Warnings 63
4.7 Warning and Alarm Definitions 67
4.8 After Repair Tests 74
5 Frequency Converter and Motor Applications
75
5.1 Torque Limit, Current Limit, and Unstable Motor Operation
75
5.1.1 Overvoltage Trips 76
5.1.2 Mains Phase Loss Trips 76
5.1.3 Control Logic Problems 76
5.1.4 Programming Problems 77
5.1.5 Motor/Load Problems 77
5.2 Internal Frequency Converter Problems 78
5.2.1 Overtemperature Faults 78
Contents High Power Service Manual for Modular F Frame Drives
2 MG90K202 - VLT
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