Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 288)

10-46 TROUBLESHOOTING
1557-UM050F-EN-P – June 2013
Troubleshooting Guide
# FAULT / ALARM PROBABLE CAUSE RECOMMENDED ACTION
1 LINE CONTACTOR WILL
NOT CLOSE IN TEST
MODE #3 1. MAINTAINED E. STOP
DEPRESSED
2. EXTERNAL EMERGENCY STOP
PB OR CUSTOMER‟S
PERMISSIVE CONTACTS NOT
CLOSED (IF PROVIDED)
3. RELAYS CR1 & CR2 NOT
ENERGIZED
4. THE AUXILIARY CONTACTS OF
CR2 DO NOT MAKE
5. CR & CR2 ENERGIZED BUT MAIN
CONTACTOR DOES NOT CLOSE
1A. RESET DRIVE E. STOP
2A. CHECK THE E-STOP CONTACT FROM
CUSTOMERS T-B TO DRIVE T-B
3A. CHECK FOR THE AVAILABILITY OF
CONTROL POWER
B. CHECK WHETHER START PB IS O.K.
C. CHECK FOR DRIVE PERMISSIVE FROM
CUSTOMERS PLC (IF ANY)
D. CHECK THE POSITION OF
NORMAL/OFF-TEST SELECTOR
SWITCH
E. CHECK THE INTEGRITY OF THE LINE
SIDE CONVERTER IN THE L.V. PANEL
F. CHECK THE COILS OF CR. & CR2
CONTACTORS
4A. CHECK THE AUXILIARY CONTACT
(DELAYED OPENING NC CONTACT) OF
MAIN CONTACTOR IN CR2 CONTROL
CIRCUIT
B. CHECK THE CONTACTS & REPLACE
THE CONTACTOR
5A.
CHECK THE “HC” & “CC” OF THE MAIN
CONTACTOR
2 INPUT CONTACTOR
WILL NOT HOLD IN 1. HOLDING COIL IS NOT
ENERGIZED
1A. CHECK THAT THE CONTROL WIRE
PLUG IS INSERTED PROPERLY
B. CHECK THE INTEGRITY OF THE
HOLDING COIL
C. CHECK FOR THE PRESENCE OF
METAL PARTICLES ON THE
ARMATURE
D. CHECK THE GAP ON THE “M” MAIN
CONTACTOR AUXILIARY ASSEMBLY
3 DRIVE DOES NOT
RESPOND TO START
COMMAND
1. NO CONTROL POWER
2. MEDIUM VOLTAGE NOT
PRESENT
3. FAULT ON DRIVE
1A. CHECK FOR THE AVAILABILITY OF
CONTROL POWER FROM CUSTOMER
(IF APPLICABLE)
B. CHECK THE MAIN ISOLATOR (IF
POWER IS FROM CPT) AND CLOSE IF
NECESSARY
C. CHECK THE CONTROL FUSES
D. CHECK THE INTEGRITY OF AUXILIARY
CONTACTS OF ISOLATOR
E. CHECK THE POSITION OF TEST/ OFF/
NORMAL SELECTOR SWITCH & TURN
THE POSITION TO NORMAL
2A. CHECK WHETHER MV IS AVAILABLE
FROM CUSTOMER‟S SIDE
B. CHECK THAT INPUT ISOLATOR IS
CLOSED
C. CHECK THE TRANSIENT
SUPPRESSION NETWORK FUSES.
D. CHECK THE MAIN FUSES
3A. CHECK THE PANELVIEW OR HIM
MODULE FOR ALARMS. DETERMINE
THE REASONS AND RESET
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