Contents
1 Warnings
3
2 Troubleshooting
5
Functional Tests 5
Power Circuit Test 5
Start Performance Test 5
Run Performance Test 6
Trip Messages 6
General Faults 10
3 Service Instructions
13
Frame Sizes 13
MCD5-0021B - MCD5-0053B (G1B) 14
MCD5-0068B - MCD5-0105B (G1B) 15
MCD5-0131B - MCD5-0215B (G2B) 16
MCD5-0245C (G3C) 17
MCD5-0360C - MCD5-0927C (G4C) 18
MCD5-1200C - MCD5-1600C (G5C) 19
4 Spare Parts
21
Spare Parts 21
Main Control PCB 21
Model PCB 22
Backplane PCB 23
Bypass Driver PCB 24
SCRs and Power Assemblies 25
Fans 26
Current Transformers 27
Bypass Contactors 28
Plastics 29
Complete plastics 30
Bus Bars 31
Other Spare Parts 33
5 Avoiding Damage
35
SCRs 35
Typical Causes of SCR Damage 35
Protecting SCRs 35
Semiconductor Fuses 35
Main Contactors 35
Output Relays
35
MCD 500 Service Manual Contents
MG.17.L1.02 - VLT
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