LEESON NEMA 4X SCR Control: 174107.00 - Manual (Page 45)

39 Troubleshooting
Replacement Parts
Table 3 is provided as a guide for some component parts
that may require replacement. These items are not available
from LEESON. They are readily available from suppliers of
electronic components. Replacing these items on drives that
are under warranty will void the warranty.
Table 3. Replacement Parts
Model No. Symbol Description
174102 SCR501, 502 800 V, 20 A SCR
D501-503 800 V, 20 A Diode
R501 0.01 OHM, 5 W Resistor
174103 SCR501, 502 800 V, 20 A SCR
D501-503 800 V, 20 A Diode
R501 0.01 OHM, 5 W Resistor
174107 SCR501, 502 800 V, 20 A SCR
D501-503 800 V, 20 A Diode
R501 0.01 OHM, 5 W Resistor
Warning
Dangerous voltages exist on the drive when it is powered.
Disconnect power from the drive and allow time for the
voltage on the capacitors to dissipate before working on
the drive. Use insulated tools and the appropriate
personal protection equipment. BE ALERT. High voltages
can cause serious or fatal injury.
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