User Manual

1336-5.39 – August, 1999
I-25
1. Access the SCR Module. Refer to “SCR Module Access” on
page I-11.
2. Set your meter to test diodes.
3. The following table shows meter connections and ideal meter
readings for those connections. Refer to Figure I-11 for meter
connection locations.
4. Replace the SCR Module if any meter readings are not as shown.
Refer to “SCR Module Replacement” on page I-26.
5. If the SCR Module shorted, check the IGBT Modules for
damage.
Important: Refer to your Service or Troubleshooting Manual for
IGBT Module test information.
Assemble the drive in reverse order of removal. Refer to “Torque
Sequence” on page I-4. Refer to “Torque Specifications” on page I-11
for final tightening.
Meter (+) Lead Meter (-) Lead
Nominal Meter Reading
Volts Ohms
Diode
131 – 3 MΩ open
3 1 0.3 – 0.4V 0 – 200KΩ
SCR
1 2 open 0.2 – 0.6 MΩ
2 1 open 0.2 – 0.6 MΩ
2G0.0055 – 20 Ω
G20.0055 – 20 Ω
!
ATTENTION: Replace all guards before applying
power to the drive. Failure to replace guards may result
in death or serious injury.