Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 290)

10-48 TROUBLESHOOTING
1557-UM050F-EN-P – June 2013
# FAULT / ALARM PROBABLE CAUSE RECOMMENDED ACTION
4 LINE SIDE CONVERTER
DEVICE SHORTED 1. DEVICE SHORTED BY
EXTERNAL MEANS
2. GATE DRIVER DIAGNOSTIC
CIRCUIT FAILURE
3. DEVICE FAILURE HAS
OCCURRED
4. IMPROPER VOLTAGE
FEEDBACK
1A. CHECK SNUBBER CIRCUIT
B. CHECK THE WIRING
C. CHECK THE FIBER OPTIC CABLE
2A. CHECK FOR GATE SIGNALS IN TEST
MODE 1; IF NO SIGNAL, REPLACE THE
BOARDS
3A. CHECK THE RESISTANCE OF DEVICE.
REPLACE THE MATCHED SET OF
DEVICES IF THE DEVICE READS ZERO
OHMS
4A. CHECK THE VOLTAGE FEED BACK
CIRCUITS AND RESISTORS
5 MACHINE SIDE
CONVERTER DEVICE
SHORTED
1. DEVICE SHORTED BY
EXTERNAL MEANS
2. GATE DRIVER BOARD FAILURE
3. DRIVE NOT STABLE
1A. CHECK THE SNUBBER NETWORK
B. CHECK THE WIRING
C. CHECK THE FIBER OPTIC CABLE
2A. CHECK THE FUSES ON THE IGDPS.
REPLACE FUSE, IF BLOWN
B. CHECK FOR THE GATING PULSES.
IF NO PULSES, REPLACE THE GATE
DRIVER BOARD
C. CHECK THE POWER SUPPLY BOARD.
IF THE POWER SUPPLY READINGS DO
NOT ADJUST, REPLACE THE BOARD
D. CHECK THE VOLTAGE SHARING
RESISTORS
3A. MONITOR MACHINE FLUX SIGNAL AND
CHECK FOR OSCILLATIONS IN DRIVE
SPEED OR CURRENT AND RE-TUNE IF
NECESSARY.
6 NO DISPLAY ON PANEL
VIEW 1. PANEL VIEW DEFECTIVE
2. NO POWER SUPPLY
3. NO COMMUNICATION
4. LIGHT BULB IS BURNT OUT. 1A. CHECK POWER SUPPLY
B. CHECK THE CPB HEALTHY LED IS ON
C. CHECK THE RIBBON CABLES
D. REPLACE PANEL VIEW
2A. CHECK CONTROL POWER SUPPLY
3A. CHECK FOR THE HEALTHY GREEN
LED ON COMMUNICATION
PROCESSOR BOARD
B. CHECK THE CABLE BETWEEN
COMMUNICATION PROCESSOR
BOARD AND PANEL VIEW
C. REBOOT THE PANEL VIEW
4.
REPLACE THE BULB.
7 INPUT POWER STAYS
ON WHEN ISOLATOR
SWITCH IS IN OFF
POSITION 1. ISOLATION SWITCH DEFECTIVE 1A. THE ISOLATION SWITCH BLADES
REMAIN ENGAGED WHEN THE
SWITCH IS IN OFF POSITION ISOLATE
THE POWER FROM INCOMING
BREAKER, CHECK THE ISOLATION
SWITCH MECHANISM
8 AC CONTROL POWER
FAULT 1. LOSS OF AC POWER 1A. CHECK FOR THE PRESENCE OF
CONTROL POWER
B. CHECK THE LEVEL OF INCOMING
CONTROL POWER SUPPLY >85%
C. CHECK THE ANNUNCIATION MODULE
D. REPLACE THE ANNUNCIATION