4.2.1 Troubleshooting 6430 Power Board
Corrective action
table
Use the following table to troubleshoot the 6430’s power
supply.
SYMPTOM
POSSIBLE CAUSE
ACTION
Motor does not
turn LEDs ON
(green and/or
red)
120/240 Vac switch in 240
position, input from 120
Vac
Turn power off, correct switch
position.
AC Input line low
Increase Input AC to spec.
Dead short or overload
across external 66 Vdc
output connector (J6).
Remove short or reduce load.
Over temperature
Check ambient temperature or
internal fan malfunction/blockage.
Bad load connection
Check load connection.
Check J6 Vdc output with a
voltmeter and ensure output
voltage is 66V
±
3%.
1. If output voltage > 70 Vdc and
< 78 Vdc add a load and
ensure Vdc is
≈
66Vdc.
2. If output voltage > 78 Vdc,
return 6430 to factory for
service.
Drive board fault
See Section 4.2.2
4 - 2
6430 Installation and Hardware Reference Manual - Rev 1
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