YASKAWA GPD-506V

UNDERVOLTAGE ( Uu ) FAULT INDICATION
IS INPUT AC
SUPPLY
CORRECT?
NO
NO
YES
YES
NO
YES
IS THERE AT LEAST 225VDC
(FOR 230V DRIVE), 450VDC
(FOR 460V DRIVE) OR 560VDC
(FOR 575V DRIVE) FROM
TERMINAL + TO - ?
- INCREASE VOLTAGE
WITHIN PROPER RANGE.
- CHECK WIRING BETWEEN
MAIN AC CONTACTOR
AND DRIVE.
DRIVE
IS FAULTY.
REMOVE NOISE SOURCE:
• CONNECT SURGE
SUPPRESSOR TO RELAY
AND MAGNETIC CON-
TACTOR COILS.
• PROVIDE LINE FILTER
TO REMOVE NOISE ON
INPUT POWER LINE.
ERRONEOUS OPERATION
DUE TO NOISE?
CONTROL PCB OR GATE
DRIVE PCB IS FAULTY.
REPLACE FAULTY BOARD.
6-13
TROUBLESHOOTING CHART 6.7