Yaskawa VCD 723 - Manual (Page 66)

4 Troubleshooting/Maintenance
60 Troubleshooting Flowcharts
9/15/93
"CHARGE" LAMP
ON MAIN PC BOARD
LIT?
CHECK CIRCUIT
BREAKER, MAGNETIC
CONTACTOR AND
INPUT POWER.
NO
NO
(CONTROL BY
EXT. INPUTS)
NO
(CONTROL
BY DIGITAL
OPERATOR)
NO
NO
YES
YES
YES
YES
RATED VOLTAGE
ACROSS TERMINALS
L1(R), L2(S), AND L3(T)?
FAULT CODE
SHOWN ON
LCDU?
GO TO APPROPRIATE
CHART, 5 THRU 13
AND TABLE 8.
RUN
LAMP
ON?
DIGITAL
OPERATOR
ASSEMBLY
IS FAULTY.
REPLACE.
PROPER SPEED
REFERENCE INPUT?
PER PAC DIAGRAM
NO
CHECK EXTERNAL
CIRCUITS FOR
PROBLEM AND
REPAIR.
YES
REFERENCE PAC DIAGRAMS
FOR LOGIC INPUTS; RUN,
STOP AND E-STOP.
Chart 1. Motor Does Not Rotate
NO
CHECK
EXTERNAL
CIRCUITS
FOR
PROBLEM
AND
REPAIR.
CONSULT FACTORY