6.3 Drive Alarms, Faults, and ErrorsYASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual 301Troubleshooting6◆ Alarm and Error Displays■ FaultsTable 6.9 gives an overview of possible fault codes. As conditions such as overvoltage can trip both a fault and an alarm,it is important to distinguish between faults and alarms in order to find the right corrective action.When the drive detects a fault, the ALM indicator LEDs lights and the fault code appears on the display. The drive faultcontact MA-MB-MC will be triggered. If the ALM LED blinks and the code appearing on the operator screen is flashes,then an alarm has been detected. See Minor Faults and Alarms on page 302 for a list of alarm codes.Table 6.9 Fault Displays (1)Digital Operator Display Name Page Digital Operator Display Name PageLED Operator LCD Operator LED Operator LCD OperatorboL Braking Transistor Overload Fault 306 FAn Internal Fan Fault 309bUS Option Communication Error 306 FbH Excessive PID Feedback 309CE MEMOBUS/Modbus CommunicationError 306 FbL PID Feedback Loss 310CF Control Fault 306 GF Ground Fault 310,<1>CPF00, CPF01 Control Circuit Error 306LF Output Phase Loss 310LF2 Current Imbalance 310CPF02 A/D Conversion Error 306 nSE Node Setup Error 310CPF03 Control Board Connection Error 307 oC Overcurrent 311CPF06 EEPROM Memory Data Error 307 oFA00 Option Card Connection Error (CN5-A) 311, CPF07,CPF08 Terminal Board Connection Error 307oFA01 Option Card Fault (CN5-A) 311to oFA03 to oFA06 Option Card Error (CN5-A) 311,<1>CPF20, CPF21 Control Circuit Error 307, oFA10, oFA11 Option Card Error (CN5-A) 311CPF22 Hybrid IC Error 307CPF23 Control Board Connection Error 307 to oFA12 to oFA17 Option Card Connection Error (CN5-A) 311CPF24 Drive Unit Signal Fault 307to CPF26 to CPF34 Control Circuit Error 307 to oFA30 to oFA43 Option Card Connection Error (CN5-A) 311dEv Excessive Speed Deviation (for ControlMode with PG) 308 oFb00 Option Card Connection Error (CN5-B) 312dv1 Z Pulse Fall Detection 308 oFb01 Option Card Fault (CN5-B) 312dv2 Z Pulse Noise Fault Detection 308 oFb02 Option Card Fault (CN5-B) 312dv3 Inversion Detection 308 , oFb03, oFb11 Option Card Error (CN5-B) 312dv4 Inversion Prevention Detection 308 to oFb12 to oFb17 Option Card Connection Error (CN5-B) 312dWFL DriveWorksEZ Fault 308E5 SI-T3 Watchdog Timer Error 308 to oFb30 to oFb43 Option Card Connection Error (CN5-B) 312EF0 Option Card External Fault 309to EF1 to EF8 External Fault (input terminal S1 to S8) 309oFC00 Option Card Connection Error (CN5-C) 312oFC01 Option Card Fault (CN5-C) 312Err EEPROM Write Error 309 oFC02 Option Card Fault (CN5-C) 312
