Yaskawa GPD503 Drive - Manual (Page 117)

TROUBLESHOOTING CHART 7.3
OVERVOLTAGE ( ou ) FAULT INDICATION
IS INPUT AC SUPPLY
VOLTAGE CORRECT?
NO
NO
NO
NO
DECREASE TO
PROPER VOLTAGE
RANGE.
YES
YES
YES
YES
YES
DOES OV TRIP
OCCUR ONLY
DURING DECEL-
ERATION?
DOES OV TRIP
STILL OCCUR
DURING DECEL-
ERATION?
WITH GPD 503 IN
STOPPED CONDITION,
INCREASE DECELER-
ATION TIME BY
REPROGRAMMING
bn-02 OR bn-04.
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 SIGNALS TO
BASE DRIVE PCB ARE
FAULTY. REPLACE
CONTROL PCB.
IS BRAKING
OPTION
INSTALLED?
ADD BRAKING OPTION,
OR REPLACE GPD 503
WITH ONE OF LARGER
CAPACITY. CHECK LOAD
INERTIA
REQUIREMENTS.
7-5