Danfoss VLT HVAC FC 100, Service Manual, Page: 8 / 220

Figure 6.18: Gate Signal Waveform from Gate Drive Card. IGBT Gate Signal measured on
the Gate Drive Card: 5 volts per division vertical scale, 50 microseconds per division time
scale. Unit running at 30 Hz.
6-32
Figure 6.19: Gate Signal Waveform from Signal Test Board. IGBT Gate Signal measured with
the Signal Test Board: 2 volts per division vertical scale, 50 microseconds per division time
scale. Unit running at 30 Hertz.
6-32
Figure 7.1: Control Card Access 7-2
Figure 7.2: Power Card, and Mounting Plate 7-3
Figure 7.3: Soft Charge Card Assy 7-5
Figure 7.4: Gate Drive Card 7-6
Figure 7.5: D2/D4 7-7
Figure 7.6: D1/D3 7-8
Figure 7.7: D2/D4 7-9
Figure 7.8: D2/D4 7-10
Figure 7.9: D1/D3 7-11
Figure 7.10: D1/D3 7-12
Figure 7.11: Input Terminal Mounting Plate Assembly (no options shown) 7-13
Figure 7.12: D2/D4 7-14
Figure 7.13: D2/D4 7-15
Figure 7.14: D2/D4 7-16
Figure 7.15: D2/D4 7-17
Figure 7.16: D1/D3 7-18
Figure 7.17: D1/D3 7-19
Figure 7.18: D1/D3 7-20
Figure 7.19: Current Sensors 7-21
Figure 7.20: Fan Assembly (1 of 2) 7-22
Figure 7.21: Fan Assembly (2 of 2) 7-23
Figure 7.22: AC Input Terminals (no options shown) 7-24
Figure 7.23: D2/D4 7-25
Figure 7.24: D2/D4 7-26
Figure 7.25: D2/D4 7-27
Figure 7.26: D1/D3 7-28
Figure 7.27: D1/D3 7-29
Figure 8.1: Control Card Access 8-2
Figure 8.2: Power Card, and Mounting Plate 8-3
Figure 8.3: Soft Charge Card 8-4
Figure 8.4: Gate Drive Card. 8-5
Figure 8.5: Upper and Lower Capacitor Bank Assemblies 8-7
High Power Service Manual for VLT
®
FC Series
Adjustable Frequency Drives Contents
MG.90.L1.22 - VLT ® is a registered Danfoss trademark