Yaskawa GPD503 Drive - Manual (Page 122)

TROUBLESHOOTING CHART 7.8
INVERTER OVERHEATED ( oH ) FAULT INDICATION
IS AMBIENT
TEMPERATURE
45°C (113°F)
OR GREATER?
REDUCE AMBIENT
TEMPERATURE.
HEAT SINK
THERMOSWITCH
IS FAULTY.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
IS HEAT SINK
CLEAN?
COOLING FAN
STOPPED?
CLEAN HEAT
SINK.
REPLACE
COOLING FAN.
WITH POWER OFF, DISCON-
NECT HARNESS CONNECTOR
FROM 17CN ON CONTROL PCB.
USE OHMMETER (X1 RANGE)
TO MEASURE BETWEEN PINS
6 AND 7. DOES METER INDI-
CATE A SHORT AFTER GPD 503
HAS HAD SUFFICIENT
TIME TO COOL?
RECONNECT HARNESS
CONNECTOR TO 17CN.
ERRONEOUS OPERATION
DUE TO NOISE?
CONTROL PCB OR BASE
DRIVE PCB IS FAULTY.
REPLACE FAULTY BOARD.
REMOVE NOISE SOURCE:
• CONNECT SURGE
SUPPRESSOR TO RELAY
AND MAGNETIC CON-
TACTOR COILS.
• PROVIDE LINE FILTER
TO REMOVE NOISE ON
INPUT POWER LINE.
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