Danfoss VLT FC Series Service Guide

4.3 Status Messages
34
4.4 Status Message Denitions
34
4.5 Service Functions
37
4.6 Drive Inputs and Outputs
38
4.6.1 Input Signals 38
4.6.2 Output Signals 38
4.6.3 Control Supply 39
4.7 Control Terminals
39
4.8 Control Terminal Functions
40
4.9 Shielded Cable Grounding
41
5 Internal Drive Operation
42
5.1 Introduction
42
5.2 Description of Operation
42
5.2.1 Logic Section 44
5.2.2 Logic-to-power Interface 44
5.2.3 Power Section 45
5.3 Sequence of Operation
46
5.3.1 Rectier Section 46
5.3.2 Intermediate Section 49
5.3.3 Inverter Section 52
5.3.4 Brake Option 55
5.3.5 Cooling Fans 57
5.3.6 Fan Speed Control 57
5.3.7 Load Sharing and Regen 58
5.3.8 Specic Power Card Connections 59
6 Troubleshooting
60
6.1 Troubleshooting Tips
60
6.2 Exterior Fault Troubleshooting
60
6.3 Fault Symptom Troubleshooting
60
6.4 Visual Inspection
61
6.5 Fault Symptoms
62
6.5.1 No Display 62
6.5.2 Intermittent Display 62
6.5.3 Motor Does Not Run 62
6.5.4 Incorrect Motor Operation 62
6.6 Alarms and Warnings
63
6.6.1 Overview of Alarms and Warnings 63
6.6.2 Alarm/Warning Identication Tables 64
6.7 Alarm and Warning Denitions
68
Contents
VLT
®
FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
2 Danfoss A/S © 02/2019 All rights reserved. MG94A502

Danfoss VLT FC Series Specifications

General

Category	DC Drives
Series	VLT FC Series
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Overtemperature, Motor overload
Communication Interfaces	CANopen, PROFIBUS, Ethernet
Cooling Method	liquid-cooled
Enclosure Rating	IP20, IP21, IP55
Ambient Temperature	-10°C to +40°C (14°F to 104°F) without derating