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LED Display
LCD Display
• Cooling fan is inoperative.
OC2P
Over-Heat
• Ventilation openings are obstructed.
During Dec
• Internal thermistor is disconnected.
• Deceleration time is too short.
• DC Injection current is too high.
• ASD or the motor is improperly matched to the application.
• Load fluctuations.
OC3
Over-Current
• ASD is operating at an elevated temperature.
During Run
• ASD current exceeds 340% of the rated FLA on ASDs that are 100 HP or less during a
• Cooling fan is inoperative.
OC3P
Over-Heat
• Ventilation openings are obstructed.
During Run
• Internal thermistor is disconnected.
• Improper V/f setting.
• ASD or the motor is improperly matched to the application.
• Low impedance at the U lead of the ASD output.
OCL or OCA1
U Phase OC
• Low impedance at the V lead of the ASD output.
OCL or OCA2
V Phase OC
• Low impedance at the W lead of the ASD output.
OCL or OCA3
W Phase OC
• Cooling fan is inoperative.
OH
Over-Heat
• Ventilation openings are obstructed.
• Internal thermistor is disconnected.
• Acceleration time is too short.
OL1
ASD Overload
• DC Injection current is too high.
• Improper V/f setting.
• Motor is running during restart.
• ASD or the motor is improperly matched to the application.
Note: The event that caused the Trip(s) must be corrected or the monitored value must decrease to less than the
threshold value required to cause the Trip to allow for a Reset to be recognized. In the event of multiple
active Trips, the Trip displayed will remain until all Faults are corrected and all Trips are cleared.
196
Table 14. WX9 ASD Trips and Faults. (Continued)
Possible Causes/Troubleshooting
fixed-speed run or if during a fixed-speed run the ASD over-heats. On ASDs that are
greater than 100 HP, it occurs when the ASD current exceeds 320% of the rated FLA on a
fixed-speed run.
WX9 ASD Installation and Operation Manual
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