Khi biến tần Emerson Commander SK, SP, SE… dừng hoạt động mà không biết rõ nguyên nhân do đâu thì chúng ta phải dựa vào bảng mã lỗi hiển thị trên màn hình để phán đoán biến tần đang gặp lỗi gì và hướng khắc phục ra sao. Sau đây RITECH sẽ cung cấp các mã lỗi thường gặp ở biến tần Emerson Commander SK thường gặp và nêu rõ nguyên nhân lỗi, hướng dẫn khắc phục ra sao với lỗi đó
Bảng mã lỗi biến tần Emerson Commander SK
|Mã lỗi||Tình trạng||Nguyên nhân gây ra lỗi|
|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|
* The Enable/Reset terminal will not reset an O.Ld1 trip. Use the Stop/Reset key
**These trips cannot be reset for 10 seconds after they occur
Xem thêm: Cách sửa chữa biến tần Emerson
Bảng mã lỗi phần cứng Hardware Fault Codes (HF)
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)
HF11- Access to the EEPROM failed- tried to read stored parameter data but failed
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
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)
HF31- Internal Cap Bank Fan failure- check for fan rotation/blockage Size 4 and up
HF32- Power circuit temperature feedback multiplexer failure
Thông tin chi tiết hơn về mã lỗi HF
HF04 – A low DC bus voltage was detected.
HF05 – The Digital Signal Processor (DSP) failed to produce any signal at startup
HF06, HF07, HF08 – While the user code is running, it is continuously checking that the data it is receiving is valid etc. If it detects a problem, it will trip on one of the trips codes HF06, HF07 or HF08.
HF11 – All communication attempts to the EEPROM are denied.
HF20 – A fault was detected on the power board as the Drive was powered up.
HF21 – The DSP reads a voltage from the power PCB to determine the correct Drive kW size. If the voltage is different to an expected value, the Drive will trip.
HF22 – If the drive detects an OI – overcurrent trip on power up, the Drive will trip on HF22 and not OI. Remove drive enable (B4) and motor leads and re-try.
HF23 – The user interface code (DSP based) run on different priority levels and each level has a certain time to complete its tasks. If for some reason the code cannot complete its task within the allotted time the Drive trip.
HF25 – A failure of communications between the DSP and control PCB microprocessor.
HF26 – There is a critical problem of the inrush circuit of the power board.
HF27 – The thermistor has failed or has measured a value out of tolerance.
HF28 – Power circuit thermistor 2 or 3 fault – Internal fan fault on Size 3 only DSP- is Digital Signal Processor – 2nd processor running in conjunction with the main drive processor.
HF29 – If the SK is fitted with a heatsink fan then it is failing and drawing excessive current.
HF29 is typically an indication that the cooling fans at the bottom of the Drive are not spinning. With power off and Drive discharged, one should check into the fan area to check for foreign debris to see that the Fan(s) can spin freely.
HF30 – DCCT wire break trip from power module