YASKAWA iQpump1000 Installation & Start?up Manual

Contents

HOA Keypad Display Fault NameUv1DC Bus UndervoltageOne of the following conditions occurred while the drive was running:• Voltage in the DC bus fell below the undervoltage detection level (L2-05).• For 200 V class drives: approximately 190 V• For 400 V class drives: approximately 380 V (350 V when E1-01 is less than 400)• For 600 V class drives: approximately 475 VThe fault is output only if L2-01 is set to 0 or 1 and the DC bus voltage has fallen below the level set to L2-05 forlonger than the time set to L2-02.Uv2 Control Power Supply Voltage FaultVoltage is too low for the control drive input power.Uv3 Undervoltage 3 (Soft-Charge Bypass Circuit Fault)The soft-charge bypass circuit failed.Uv4<1>Gate Drive Board UndervoltageVoltage drop in the gate drive board circuitVLTS Volute-Thermostat FaultvoF Output Voltage Detection FaultProblem detected with the voltage on the output side of the drive.WLLWater Level Loss Water Level Loss<1> Detected in models 4A0930 and 4A1200.u Alarm Detectionn Alarm CodesAn alarm is indicated by a code on the data display and the flashing ALM LED. The drive output is not necessarily switchedoff.To remove an alarm, trace and remove the cause, and reset the drive by pushing the Reset key on the operator or cycle thepower supply.Refer to the drive User Manual for a complete list of causes and possible solutions.HOA Keypad Display Alarm NameACCUMAccum LevelAccumulated Level ErrorThe total volume of water flow measured over time by the flow meter has exceeded the fault level setting.Accum Lvl ReachedCycle Run Cmd Flow Accumulation level reachedAnalogFB LostSwitched to NetAnalog Feedback LostAnalog feedback has not been detected and the network PI feedback signal is now used.Anti-Jam Active Anti-Jam AlarmAUXFBPI Aux Lvl Loss Wire-break detection for PI Aux Feedback LevelBackup FdBk LostCheck/Replace Backup Feedback Device (H3-oo = 24) lost.bAT Digital Operator Battery Voltage Lowbb BaseblockDrive output interrupted as indicated by an external baseblock signal.boL Braking Transistor Overload FaultThe braking transistor in the drive has been overloaded.bUSOption Communication Error• The connection was lost after initial communication was established.• Assign a Run command frequency reference to the option.CALL Serial Communication Transmission ErrorCommunication has not yet been established.i.6 Troubleshooting78 YASKAWA TOEP YAIP1W 02E YASKAWA AC Drive - iQpump1000 Installation & Start-up Guide