Protective Functions Fault Detection When the MxC detects a fault, a fault contact output is triggered and the operator screen will display the appropriate fault code. The MxC output is shut off, which causes the motor to coast to a stop. The user may select how the MxC should stop the motor for some faults, and the MxC will obey the specified stop method when those faults occur. If a fault occurs, refer to the Instruction Manual (Manual No. TOEP C 710636 00 ) to identify and correct the problem that caused the fault. Use one of the following methods to reset the fault before restarting the MxC:
Set a multi - function digital input ( H 1-01 to H 1-10 ) to 14 ( Fault Reset ) and turn on the fault reset signal. Press the key on the digital operator. Cycle power to the MxC ( i.e., turn the main circuit power supply off and back on again ) . A fault may occur if there is a short between the + V, V, and AC terminals. Be sure the terminals have been wired properly. 16 Fault Display Meaning Overcurrent (OC) OC Overcurrent The MxC output current exceeded the overcurrent detection level. (200% of rated current) Ground Fault (GF) GF Ground Fault The ground fault current at the MxC output exceeded approximately 50% of the MxC rated output current.
Power Supply Undervoltage (AUV) AUV Power UV The power supplied to the MxC is below the minimum amount set to L2-21. 200 V class: Approx. 150 VAC 400 V class: Approx. 300 VAC Control Circuit Overvoltage (OV) OV PS Overvolt The control circuit voltage exceeded the overvoltage detection level. 200 V class: Approx. 410 V 400 V class: Approx. 870 V Power Supply Overvoltage (AOV) AOV Power OV The power-supply voltage exceeded the overvoltage detection level. 200 V class: Approx. 250 VAC 400 V class: Approx. 550 VAC Control Circuit Undervoltage (UV1) UV1 Undervoltage The control circuit DC voltage is below the Undervoltage Detection Level (L2-05). 200 V class: Approx. 190 V 400 V class: Approx.
380 V Control Power Fault (UV2) UV2 CTL PS Undervolt Not enough voltage is being produced by the power supply. Power Supply Frequency Fault (FDV) FDV Freq DEV The fluctuation in the power frequency exceeded the allowable amount. Power Phase Rotation Variation(SRC) SRC Power Phase Err After control power supply is on, the direction of the phase rotation changes. Output Open-phase (LF) LF Output Pha Loss An open phase occurred at the MxC output. This fault is detected when L8-07 is set to “ Enabled ”. Cooling Fin Overheating (OH,OH1) OH, OH1 Heatsnk Overtemp The temperature of the MxC’s cooling fins exceeded the setting in L8-02, 100˚C, or the overheating protection level.
Motor Overheating Alarm (OH3) OH3 Motor Overheat 1 The motor temperature exceeds the alarm detection level when L1-01 is set to 0, 1, or 2. Motor Overheating Fault (OH4) OH4 Motor Overheat 2 The motor temperature exceeds the operation detection level. Resistor Overheat (SOH) SOH Dischrg Res. Flt The temperature of the resistor exceeded tolerance. Internal Resistance Overheat (DOH) DOH Dumping OH The temperature of the built-in resistor exceeded the set value. Motor Overload (OL1) OL1 Motor Overloaded The motor overload protection function has operated based on the internal electronic thermal value.
MxC Overload (OL2) OL2 MxC Overloaded The MxC overload protection function has operated based on the internal electronic thermal value. Overtorque Detected 1 (OL3) OL3 Overtorque Det 1 The current is greater than the setting in L6-02 for longer than the setting in L6-03. Overtorque Detected 2 (OL4) OL4 Overtorque Det 2 The current is greater than the setting in L6-05 for longer than the setting in L6-06. Undertorque Detected 1 (UL3) UL3 Undertorq Det 1 The current is less than the setting in L6-02 for longer than the setting in L6-03. Undertorque Detected 2 (UL4) UL4 Undertorq Det 2 The current is less than the setting in L6-05 for longer than the setting in L6-06.
Overspeed (OS) OS Overspeed Det The speed is greater than the setting in F1-08 for longer than the setting in F1-09. PG Disconnection Detected (PGO) PGO PG Open No PG pulse was input when the MxC was outputting a frequency. Excessive Speed Deviation (DEV) DEV Speed Deviation The speed deviation is greater than been greater than the setting in F1-10 for longer than the setting in F1-11. Control Fault (CF) CF Ctl Fault The torque limit is continuously reached for three seconds or longer during a decelerate to stop with open-loop vector control.