Fault Screen Display

 

Possible Causes

 

 

 

 

 

 

 

 

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.

 

 

 

 

150

W7 ASD Installation and Operation Manual

Page 156
Image 156
Toshiba W7 Comm Error, Ctrl Undervolts, CPU Error, Main Undervolts, Fuse, DBR Overcurrent, DBR Overload, GND Fault, Off