Alarms, Trips, and Troubleshooting
W7B ASD Installation & Operation Manual
https://www.toshiba.com/tic/
183
Note:
The event that caused the Trip(s) must be corrected or 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.
Load End OC
• Improper wiring at the ASD output to the motor.
Main Bd. EEPROM Fault
• Internal EEPROM malfunction.
Motor Overload
• V/f setting needs to be adjusted.
• Motor is locked.
• Continuous operation at low speed.
• Load requirement exceeds ability of the motor.
• Startup frequency setting adjustment required.
OC During ACC
• V/f setting needs to be adjusted.
• Restart from a momentary power outage.
• The ASD is starting into a rotating motor.
• ASD/Motor not properly matched.
• Phase-to-phase short (U, V, or W).
• Accel time too short.
• Voltage Boost setting is too high.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is running.
• ASD current exceeds 340% of the rated FLA on ASDs that are 100
HP or less during acceleration. On ASDs that are greater than 100
HP, this fault occurs when the ASD current exceeds 320% of the
rated FLA during acceleration.
OC During DEC
• Phase-to-phase short (U, V, or W).
• Deceleration time is too short.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is running.
• ASD current exceeds 340% of the rated FLA on ASDs that are 100
HP or less during deceleration. On ASDs that are greater than 100
HP, it occurs when the ASD current exceeds 320% of the rated FLA
during deceleration.
OC During Run
• Load fluctuations.
• ASD is operating at an elevated temperature.
• ASD current exceeds 340% of the rated FLA on ASDs that are 100
HP or less during a 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.
Table 11. (Continued) Trips and Faults.
Fault Screen Display
Possible Causes
Summary of Contents for W7 DN-57442-006
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