Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 300)

10-58 TROUBLESHOOTING
1557-UM050F-EN-P – June 2013
# FAULT / ALARM PROBABLE CAUSE RECOMMENDED ACTION
48 DRIVE RUNS AT LESS
THAN COMMANDED
SPEED 1. SPEED REGULATOR IN
TORQUE LIMIT
2. CURRENT REGULATOR IN LIMIT
1A. DECREASE LOAD
1B. INCREASE TORQUE LIMIT PARAMETER
(DRIVE MAY TRIP ON OVERLOAD)
2.
IF LINE FIRING ANGLE IS STUCK AT
ADVANCE LIMIT (8 DEGREES) DC LINK
VOLTAGE IS AT MAXIMUM. INCREASE
LINE VOLTAGE OR DECREASE MOTOR
FLUX COMMAND.
49 PANELVIEW
COMMUNICATIONS
ERRORS 1. LOSS OF DRIVE CONTROL
POWER
2.
5 VOLT-DC OUTPUT ON DC\DC
CONVERTER OUT OF
TOLERANCE, LEVELS BELOW
4.6 VOLT WILL CAUSE DCBs
TO CRASH
3.
15 VOLT-DC OUTPUTS ON
DC\DC CONVERTER OUT OF
TOLERANCE
1. CORRECT CAUSE FOR LOSS OF
CONTROL POWER
2.
REPLACE DC\DC CONVERTER
3.
REPLACE DC\DC CONVERTER