Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 293)

TROUBLESHOOTING 10-51
1557-UM050F-EN-P – June 2013
# FAULT / ALARM PROBABLE CAUSE RECOMMENDED ACTION
17 INPUT CLOSED
WARNING
1. A WARNING INDICATING THAT
THE INPUT IS CLOSED WHEN IT
IS REQUESTED TO BE OPEN
2. CONTACTOR CONTROL POWER
NOT PRESENT OR
INTERMITTENT
3. OPEN CONTACT IN THE
CONTACTOR CONTROL WIRING
1A. CHECK THE CONTROL WIRING AND
FUNCTION OF CONTROL RELAYS
B. CHECK THE INTEGRITY OF DRIVE I/O
BOARD
C. CHECK THE AUXILIARY CONTACT OF
MAIN CONTACTOR
D. IDENTIFY ANY PARALLEL PATHS,
WHICH MAY BE CAUSING THE
VACUUM CONTACTOR TO STAY ON
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 FUSE
E. CHECK THAT ISOLATION SWITCH AUX.
CONTACT ADJUSTMENTS.
3A. RESET DRIVE EMERGENCY STOP.
B. CHECK IF EXTERNAL CUSTOMER
EMERGENCY STOP/PERMISSIVE
CONTACT IS OPEN.
18 INPUT OPEN FAULT
1. INDICATION THAT THE INPUT
CONTACTOR HAS OPENED
WHEN THE DRIVE IS RUNNING
2. CONTACTOR CONTROL POWER
NOT PRESENT OR
INTERMITTENT
3. OPEN CONTACT IN THE
CONTACTOR CONTROL WIRING
1A. CHECK THE OPERATION OF VACUUM
CONTACTOR AND CHECK THE
HOLDING COIL
B. CHECK THE CONTROL CIRCUIT
C. CHECK THE DRIVE I/O BOARD FOR
MALFUNCTION
D. CHECK THE RIBBON CABLES. FROM
LINE DCB TO I/O BOARD
E. CHECK AUXILIARY CONTACTS OF
INPUT 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.