Emerson VFD
50 videos • 797 views • by PLC AND ROBOT IIOT Pvt Ltd UU DC Bus under voltage Low AC Supply Voltage Low DC Bus voltage when supplied by an external DC power supply OU DC Bus over voltage Deceleration rate set too fast for the inertia of the machine Mechanical load driving the motor OI.AC** Drive output instantaneous over current Insufficient ramp times Phase to phase or phase to ground short circuit on the drives output Drive requires autotuning to the motor Motor or motor connections changed, re-autotune drive to motor OI.br** Braking Resistor instantaneous over current Excessive current in braking resistor Braking resistor value to small O.SPd Over Speed Excessive motor speed (typically caused by a mechanical load driving the motor tunE Autotune stopped before completion Run command removed before autotune compelte It.br I2t on Braking Resistor Excessive braking resistor energy lt.AC l2t on drive output current Excessive Mechanical load High impedance phase to phase or phase to ground short circuit at drive output Drive requires re-autotuning to motor O.ht1 IGBT over heat based on dries thermal model Over heat software thermal module O.ht2 Over heat based on drives heatsink Heatsink temperature exceeds maximum allowable th Motor thermistor trip Excessive motor temperature O.Ld1* User +24v or digital output overload Excessive load or short circuit on +24v output cL1 Analogue input 1 current mode, current loss Input current less than 3mA when 4-20 or 20-4mA modes selected SCL Serial communication loss time-out Loss of communication when drive is under remote control EEF Internal Drive EEPROM trip Possible loss of parameter values PH Input phase imbalance or input phase loss One of the input phases has become disconnected from the drive (applies to 200/400v three phase drives only, not dual rated drives. rS Failure to measure motors stator resistance Motor too small for drive Motor cable disconnected during measurement C.Err SmartStick data error Bad connection or memory corrupt within SmartStick C.dAt SmartStick data does not exist New/empty SmartStick being read C.Acc SmartStick read/write error fail Bad connection or faulty SmartStick C.rtg SmartStick/drive rating change Already programmed SmartStick read by a drive of a different rating O.cL Overload on current loop input Input current exceeds 25mA HFxx trip Hardware faults Internal drive hardware fault HF01 to HF03 Not used HF04 Low DC bus at power up- may indicate an AC Input or pre-charge problem HF05 No internal handshake signal from second processor (DSP) at start up HF06 Unexpected interrupt HF07 Watchdog failure HF08 Interrupt crash (code overrun) HF09 to HF10 Not used HF11 Access to the EEPROM failed- tried to read stored parameter data but failed HF12 to HF19 Not used HF20 Power stage – code error Tried to read power board and read back erroneous HF21 Power stage – unrecognized frame size HF22 Overcurrent detection at power up- possible output short or bridge failure HF23 DSP software overrun HF24 Not Used HF25 DSP Communications failure- communication from main to 2nd processor HF26 Soft start relay failed to close; or soft start monitor failed; or braking IGBT short circuit at power up HF27 Power stage thermistor fault HF28 Power circuit thermistor 2 or 3 fault Internal fan fault on size 3 only HF29 Fan failure (current too high – only on drives with a fan) see note below HF30 Not used HF31 Internal Cap Bank Fan failure- check for fan rotation/blockage Size 4 and up HF32 Power circuit temperature feedback multiplexer failure Looking for more information about Control Techniques equipment? Read on here. Shopping for new or refurbished Control Techniques parts? Shop for the parts you’re looking for here, or find out more about how MRO Electric can help you repair your equipment.