Uv - Undervoltage - Veikong gpd 515/g5 Startup Manual

TROUBLESHOOTING CHART 6.9
" UV – Undervoltage " FAULT INDICATION
IS INPUT AC
SUPPLY
CORRECT?
YES
IS THERE
AT LEAST 450VDC
(FOR 460V DRIVE) OR
225VDC (FOR 230V DRIVE)
ON THE DC BUS?
(SELECT MONITOR DISPLAY
U1-07 TO CHECK VOLTAGE)
YES
ERRONEOUS OPERATION
DUE TO NOISE?
NO
CONTROL PCB OR GATE
DRIVE PCB IS FAULTY.
REPLACE FAULTY BOARD.
- INCREASE VOLTAGE
NO
WITHIN PROPER RANGE.
- CHECK WIRING BETWEEN
MAIN AC CONTACTOR
AND DRIVE.
DRIVE
NO
IS FAULTY.
REMOVE NOISE SOURCE:
YES
• CONNECT SURGE
SUPPRESSOR TO RELAY
AND MAGNETIC CON-
TACTOR COILS.
• PROVIDE LINE FILTER
TO REMOVE NOISE ON
INPUT POWER LINE.
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