Yaskawa VCD 723 - Manual (Page 67)

4 Troubleshooting/Maintenance
61 Troubleshooting Flowcharts
9/15/93
Chart 2. Motor Stalls During Operation
ACCELERATION TIME
TOO SHORT?
YES
YES
YES
YES
WITH DRIVE IN
STOPPED CONDITION,
EXTEND ACCELER-
ATION TIME BY
REPROGRAMMING
PER PAC DIAGRAM.
NO
NO
NO
NO
LOAD TORQUE
TOO HIGH?
LOAD
INERTIA
LARGE?
CHECK IF SPECIAL
MOTOR IS USED.
LARGE MOTOR
TERMINAL
VOLTAGE DROP?
- USE LARGER WIRE
BETWEEN DRIVE
AND MOTOR.
- SHORTEN WIRING
DISTANCE BETWEEN
DRIVE AND MOTOR.
- DECREASE LOAD
INERTIA.
- EXTEND ACCEL-
ERATION TIME BY
REPROGRAMMING
PER PAC DIAGRAM.
- DECREASE LOAD
TORQUE.
- REPLACE DRIVE
WITH ONE OF LARGER
CAPACITY.