Specifications

Maintenance and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
7-15
FAULT MESSAGE PROBLEM SOLUTION
OPEN ARM No armature resistance
detected or more than four
SCR's failed.
a. Check armature wiring.
b. Check motor for open armature through
360º rotation.
c. Check fuse F11 for 4 quad drives.
d. Check for motor contactor closing.
e. Replace bridge interface board.
PHASE IMBAL Line voltage unstable, varies
over 20%.
a. Check incoming line voltage.
b. Check line fuses.
c. Check for excessive line notching.
d. Replace bridge interface board.
PHASE LOSS Line power missing. a. Check fuses F8, F9, and F10.
b. Check incoming line voltage.
c. Check for excessive line notching.
d. Replace bridge interface board.
NOTE: PHASE LOSS will appear in FIFO
if power is cycled.
PLL LOCK Cannot lock onto line
frequency.
a. Check line frequency.
b. Check for notching.
c. Check fuse F10.
d. Check cable J3 on bridge interface
board.
e. Check cable J1 on the snubber board.
f. Replace cable between bridge board J4
and micro board J2.
g. Replace bridge board.
h. Replace micro board.
NOTE: PLL LOCK will appear in FIFO if
power is cycled.
SCR OPN A+F A + open SCR fault message.
SCR CR1 or fuse F8 for
510 amp and below.
SCR-A101 or fuse F1 for
540 amp and above bridges.
a. Check fuse.
b. Check cable assembly connected to J2
of microprocessor board and its
associated connectors.
c. Replace SCR or drive base assembly.
d. Replace bridge interface board.
e. Replace microprocessor board.
SCR OPN B+F B + open SCR fault message.
SCR CR2 or fuse F9 for
510 amp and below.
SCR-A102 or fuse F2 for
540 amp and above bridges.
a. Check fuse.
b. Check cable assembly connected to J2
of microprocessor board and its
associated connectors.
c. Replace SCR or drive base assembly.
d. Replace bridge interface board.
e. Replace microprocessor board.