Yaskawa GPD503 Drive - Manual (Page 120)

TROUBLESHOOTING CHART 7.6
OVERLOAD ( oL ) FAULT INDICATION
LOAD TOO LARGE
(MOTOR OVERHEATED)?
YES
YES
YES
YES
YES
YES
DECREASE LOAD
WITHIN RATING.
CHECK MOTOR
AND LOAD.
NOTIFY
FACTORY.
NO
NO
NO
NO
NO
NO
V/F SELECTION
APPROPRIATE?
WITH GPD 503 IN
STOPPED CONDITION,
REPROGRAM Sn-02 TO
PROPER V/f PATTERN.
YES
NO
MORE THAN ONE
MOTOR ON THE
GPD 503?
WITH GPD 503 IN STOPPED
CONDITION, REPROGRAM
Sn-14 TO X X X
1 TO DISABLE
THERMAL MOTOR OVERLOAD
PROTECTION CIRCUIT. THEN
INSTALL A THERMAL RELAY
OR THERMAL PROTECTOR
FOR EACH MOTOR.
WITH GPD 503 IN
STOPPED CONDITION,
REPROGRAM Cn-09.
IS GPD 503 CAPACITY
(Sn-01) FACTORY SET
CORRECTLY?
IS ELECTRONIC THERMAL
OVERLOAD (Cn-09)
SET CORRECTLY?
DISCONNECT WIRING FROM
OUTPUT TERMINALS T1 (U),
T2 (V) AND T3 (W). IS OL
STILL INDICATED?
REMOVE NOISE SOURCE:
• CONNECT SURGE
SUPPRESSOR TO RELAY
AND MAGNETIC CON-
TACTOR COILS.
• PROVIDE LINE FILTER
TO REMOVE NOISE ON
INPUT POWER LINE. CONTROL PCB OR BASE
DRIVE PCB IS FAULTY.
REPLACE FAULTY BOARD.
ERRONEOUS OPERATION
DUE TO NOISE?
7-8