Yaskawa SmartTrac AC1 - Manual (Page 60)

SMART TRAC AC1
6-4
••
Troubleshooting Your Smart Trac AC1 Technical Manual TM 3554-000
Troubleshooting Fault Conditions
Symptom Probable
Cause Corrective Action
Motor failure. Replace the motor.
Improper load
impedance. Disconnect wiring from output terminals T1,
T2, and T3. Check load impedance.
Overcurrent
when power
turned on. Failed or bad
power
transistors. Check power transistors and replace, as
required.
If the problem persists, contact your
MagneTek representative with this
information.
Electrical
noise. Remove noise source by connecting a surge
suppressor to relay and magnetic contactor
coils and/or provide a line filter to remove
noise on input power line.
Faulty control
card or gate
drive PCB. Replace faulty card.
Overload or
overheated
motor. Load too large. Decrease the load if necessary.
If the problem persists or the load is within
capacity, contact your MagneTek Engineer.
Undervoltage Improper AC
supply voltage. Check input AC supply. Increase voltage to
within the correct range, if necessary.
Check wiring between main AC contactor
and Smart Trac AC1. Correct as required for
proper operation.
Heatsink
Overtemp Ambient
temperature
too high Check ambient temperature. If 45 degrees
Centigrade (113 degrees Fahrenheit) or
greater, reduce ambient temperature.
Dirty heat
sink, reducing
its
effectiveness. Inspect heat sink. If not clean, clean it.
Fan not
operating. Check cooling fan. if included on your
Smart Trac AC1. If not running, replace it.
Erroneous
fault indication
due to noise. Remove noise source by connecting a surge
suppressor to relay and magnetic contactor
coils, or providing a line filter to remove
noise on the input power line.