Toshiba W7 - Manual (Page 156)

150 W7 ASD Installation and Operation Manual
Comm Error • Communication malfunction.
• Improper or loose connection.
• Improper system settings.
Ctrl Undervolts • This fault is caused by an undervoltage condition at the 5, 15, or the 24 VDC
supply.
• 3-phase input voltage low.
CPU Error • CPU malfunction.
Main Undervolts • 3-phase input voltage low.
• Defective control board.
• Excessive load on the power supply.
• Undervoltage/Ridethrough settings require adjustment.
Fuse • Internal DC bus fuse is open.
DBR Overcurrent • ASD inability to discharge the bus voltage during regeneration.
• No dynamic braking resistor (DBR) installed.
• Deceleration time is too short.
• Improper DBR setup information.
• Defective IGBT7 (or IGBT7 ckt.).
• 3-phase input voltage is above specification.
DBR Overload • Deceleration time is too short.
• DBR setting adjustment required.
• Overvoltage Stall setting adjustment required.
GND Fault • Ground fault at the motor.
• Ground fault at the output of the ASD.
• Current leakage to Earth Ground.
Ctrl EEPROM Err • Internal EEPROM malfunction.
EEPROM Write Err • EEPROM write malfunction.
E-Off • Emergency Off command received via EOI or remotely.
Encoder Loss • Encoder signal missing while running during closed-loop operation.
Flash Error • Flash memory malfunction.
Gate Array Error • Defective Gate Array or Gate Array malfunction.
In(put) Phase Loss • 3-phase input to the ASD is low or missing.
Load Drooping • Load requirement is in excess of the capabilities of the motor.
Load End OC • Improper wiring at the ASD output to the motor.
Under Curr(ent) Trip • Improper Low Current detection level setting.
Main EEPROM Err • Internal EEPROM malfunction.
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.
Fault Screen Display Possible Causes