Troubleshooting 10-49 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
Page 291
TROUBLESHOOTING
10-49
1557-UM050F-EN-P – June 2013
#
FAULT / ALARM
PROBABLE CAUSE
RECOMMENDED ACTION
9
ADAPTER LOSS
WARNING
1. LOSS OF COMMUNICATION
1A. CHECK THE CABLES BETWEEN
SCANport ADAPTER AND
COMMUNICATIONS PROCESSOR
BOARD
B. CHECK THE CONTROL VOLTAGE (+12V
DC)
C. CHECK THE HEALTHY LED ON COMM
PROC BOARD
D. CHECK WHETHER THE R/IO ADAPTER
IS CONNECTED ON PORT 2 OF THE
COMM PROC.
E. CHECK THE REMOTE I/O LINK TO PLC
10
BYPASS CLOSED
WARNING
1. BYPASS CONTACTOR CLOSED
WHEN IT SHOULD BE OPEN
2. CONTACTOR CONTROL POWER
NOT PRESENT OR
INTERMITTENT
3. OPEN CONTACT IN THE
CONTACTOR CONTROL WIRING
1A. CHECK THE I/O MODULES FOR
PROPER LEDs ON THE MODULE
B. CHECK THE PLC PROGRAM
C. CHECK THE FUNCTIONING OF THE
VACUUM CONTACTOR
2A. CHECK IF MEDIUM VOLTAGE FEED IS
CLOSED.
B. VERIFY THAT ISOLATION SWITCH
HANDLES ARE ENGAGED
C. CHECK THAT NORMAL-OFF-TEST
SELECTOR SWITCH IS IN THE
PROPER POSITION.
D. CHECK THE MEDIUM VOLTAGE
POWER AND LOW VOLTAGE
CONTROL FUSES.
E. CHECK THAT ISOLATION SWITCH AUX.
CONTACT ADJUSTMENTS.
F. CHECK FOR LOOSE WIRES OR
JUMPERS.
3A. RESET DRIVE EMERGENCY STOP.
B. CHECK IF EXTERNAL CUSTOMER
EMERGENCY STOP/PERMISSIVE
CONTACT IS OPEN.
11
BYPASS OPEN
WARNING
1. BYPASS CONTACTOR OPEN
WHEN IT SHOULD BE CLOSED
2. CONTACTOR CONTROL POWER
NOT PRESENT OR
INTERMITTENT
3. OPEN CONTACT IN THE
CONTACTOR CONTROL WIRING
1A. CHECK THE I/O MODULES FOR
PROPER FUNCTIONING
B. CHECK THE FUNCTIONING OF THE
VACUUM CONTACTOR
C. CHECK THE SLC/PLC PROGRAM
2A. CHECK IF MEDIUM VOLTAGE FEED IS
CLOSED.
B. VERIFY THAT ISOLATION SWITCH
HANDLES ARE ENGAGED
C. CHECK THAT NORMAL-OFF-TEST
SELECTOR SWITCH IS IN THE
PROPER POSITION.
D. CHECK THE MEDIUM VOLTAGE
POWER AND LOW VOLTAGE
CONTROL FUSES.
E. CHECK THAT ISOLATION SWITCH AUX.
CONTACT ADJUSTMENTS.
F. CHECK FOR LOOSE WIRES OR
JUMPERS.
3A. RESET DRIVE EMERGENCY STOP.
B. CHECK IF EXTERNAL CUSTOMER
EMERGENCY STOP/PERMISSIVE
CONTACT IS OPEN.