u Alarm and Error Displaysn FaultsWhen the drive detects a fault, the ALM indicator LEDs remain lit without flashing. If theLEDs flash, the drive has detected a minor fault or alarm. Refer to Minor Faults andAlarms on page 124 for more information. Conditions such as overvoltage or external faultscan trip both faults and minor faults, therefore it is important to note whether the LEDs remainlit or if the LEDs flash.LED OperatorDisplay Name PageCE MEMOBUS/ModbusCommunication Error 126CoF Current Offset Fault 126CPF02 A/D Conversion Error 126CPF06Drive specificationmismatch during TerminalBoard or Control Boardreplacement126CPF08<1>EEPROM SerialCommunications Fault 126CPF11<1> RAM Fault 127CPF12<1> FLASH Memory Fault 127CPF14<1> Control Circuit Fault 127CPF17<1> Timing Fault 127CPF18<1> Control Circuit Fault 127or CPF20orCPF21RAM Fault 127FLASH Memory Fault 127Watchdog Circuit Exception 127Clock Fault 127LED OperatorDisplay Name PageoL1 Motor Overload 130oL2 Drive Overload 130oL3 Overtorque Detection 1 131oPr Operator Connection Fault 131CPF22 A/D Conversion Error 127CPF23 PWM Feedback Data Fault 127CPF24 Drive Capacity Signal Fault 128EF0 Option Unit External Fault 128to EF1 toEF5 External Fault (inputterminal S1 to S5) 128oC Overcurrent 128oH1 Heatsink Overheat 129Err EEPROM Write Error 128Uv1 Undervoltage 133Uv3 Soft Charge Circuit Fault 133ov Overvoltage 136PF Input Phase Loss 132<1> Displayed as when occurring at drive power up. When one of the faults occurs after successfullystarting the drive, the display will show CPF01n Minor Faults and AlarmsWhen a minor fault or alarm occurs, the ALM LED flashes and the text display shows analarm code. A fault has occurred if the text remains lit and does not flash. Refer to AlarmDetection on page 134. An overvoltage situation, for example, can trigger both faults andminor faults. It is therefore important to note whether the LEDs remain lit or if the LEDs flash.5.3 Drive Alarms, Faults, and Errors124 YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
