Yaskawa inverter fault code

Yaskawa Inverter Fault Code Abnormal Indicates Fault Description Remedy Countermeasure Level
UV1; Main circuit low voltage (PUV) The main circuit voltage is lower than the "low voltage detection standard" for 15ms during operation. (Transient protection 1) Check the power supply voltage and wiring A
Dc; Bus undervolt protection 2S) low voltage detection standard 200V; about 190V below 400V: about 380V
UV2; Control Circuit Low Voltage (CUV) Control Circuit Voltage Below Low Voltage Detection Standard 2) Check Power Supply Capacity
UV3; Pre-charging contactor open circuit A during internal electromagnetic contactor fault operation
UV; Instantaneous power failure detection 1) Main circuit direct current is lower than low voltage detection standard 2) Precharge contactor
Under Volatage 3) The control circuit voltage is lower than the low voltage detection standard B
OC; Over current (OC) Inverter output current exceeds OC standard 1) Check motor impedance insulation is normal
2) Extending Acceleration/Deceleration Time A
GF; Ground fault (GF) The ground current at the output side of the inverter exceeds 50% of the rated current of the inverter 1) Check if the motor is deteriorated by insulation 2) Whether the wiring between the inverter and the motor is damaged A
OV; Overvoltage (OV) Main circuit DC voltage is higher than overvoltage detection standard 200V class: About 400V 400V class: Approximate deceleration time, install brake controller and braking resistor A
SC;Short load (SC) Short circuit at the output side of the inverter Check if the motor insulation and impedance are normal.
PUF; Fuse Break (FI) 1) Main Circuit Crystal Module Fault 2) DC Circuit Fuse Blown 1) Check Crystal Module is Normal A
Bus Fuse open 2) Check the load side for short circuit, grounding, etc.
OH; Thermal base overheat (OH1) Crystal module cooling fan temperature exceeds the allowable value Check if the fan function is normal, and the surrounding temperature is within the rated temperature A
OL1 ; Motor overload (OL1) Output current exceeds motor overload capacity Reduce load A
OL2; Inverter overload (OL2) Output current exceeds the rated current of the inverter 150% 1 minute Reduced load and extended acceleration time A
PF input under-determined 1) Inverter input power supply under-phase 2) Input voltage three-phase unbalanced 1) Check the power supply voltage is normal A
2) Check if the input end screw is tight
LF; Output undervoltage Inverter output side power supply phase insufficiency 1) Check the output terminal screw and wiring is normal A
2) Motor three-phase impedance check
RR; Braking Transistor Abnormal Braking Transistors Bad Operation Inverter Repair A
RH Brake controller overheat Brake controller temperature is higher than the allowable value Check brake time and brake resistor usage rate A
OS; Overspeed (OS) Motor speed exceeds speed standard (F1-08) A
PGO; PG disconnection (PGO) PG disconnection (PGO) 1) Check the PG connection 2) Check the motor shaft is blocked A
DEV speed deviation is too large (DEV) Speed ​​command and speed feedback value difference exceed speed deviation (F1-10) Check whether overload B
EF; Incorrect operation command and forward operation command At the same time there is a control sequence check of 0.5 seconds or more. The forward/reverse command cannot exist at the same time.
EF3-EF8 Terminal 3 External Abnormal Signal Input External Terminal 3-8 Abnormal Signal Input 1) Confirmed by U1-10 Abnormal Signal Input Terminal External Fault 3-8 EF4-EF8- Terminal 4-8 2) Performed according to terminal setting abnormality Maintenance A
OPE; 01 Inverter capacity setting error Inverter capacity parameter 902-04) Setting bad Adjust setting value C
OPE02; Limit parameter setting improper parameter setting exceeds limit value adjustment setting value C
OPE03 ; Terminal Multi-function input is not set properly H1-(01-06) setting value is not set in small or large order or repeated setting Same value Adjust setting value C
Incorrect setting of OPE; 10 v/f parameters E1-(04-10) must meet the following conditions: Fmax is equal to (E1-04) FA is greater than (E1-06) Adjustment set value v/f Ptrn Setting FB is greater than (E1 -07) Fmin(E1-09) C
OPE11; Improper setting of parameter values ​​1) C6-01 is greater than 5KHz but C6-02 is smaller than 5KHz Adjusted setting Carr frq/on-Delay 2) C6-03 is greater than 6 but C6-02 is smaller than C6-01 C
The ERR EEPROM input bad parameter cannot be written to the EEPROM when the parameter is initialized.
CALL SI-B transmission error Control signal is abnormal when power is turned on Machine control signal is newly checked C
ED; The normal response signal was not received within 2 seconds after the transmission failure control signal was sent. The machine control signal was newly checked.
CPF00 Control circuit transmission error 1 After power is turned on, the connection between the operator and the control board is abnormal within 5 seconds. Check the wiring of the control circuit from the newly installed digital operator.
CPF01 Control loop transmission abnormality 2 MPU peripheral parts failure Replace control board COM-ERR (OP&INV)
CPF02 Base blocking (BB) circuit defect Inverter control board failure Replace the control board A BB circuit Err
CPF03 EEPROM Input Poor EEPROM Error
CPF04 CUP internal A/D converter defective Internal A/D Err
GPF05 CUP internal A/D converter defective External A/D Err
CPF06 Bad peripheral interface card connection. Incorrect peripheral interface card installation. Replacement of peripheral interface card. A Option Error
Poor A/D converter of CPF20 module instruction card A/D converter of AI-14B card malfunctions Replace AI-14B card A
Option A/D Error
Definition of fault level content
A: Heavy fault, the motor is stopped naturally, the fault indication is displayed on the digital operator, and the abnormal contact output (18) (20) is turned on
B: Light fault, the motor continues to run, and the fault indication is displayed on the digital operator. Abnormal contact does not operate, multi-function output. When selected
C: Warning, the inverter does not operate, the abnormality of the fault is indicated on the digital operator, and the abnormal contact multi-function output terminal does not operate.

Yaskawa inverter common fault
1 Switching power supply damage Switching power supply damage is the most common failure of many frequency converters. It is usually caused by a short circuit in the load of the switching power supply. In the design of switching power supply lines of many frequency converters, Yaskawa's inverter is more successful because of this. The 616G3 uses a two-stage switching power supply, somewhat similar to the Fuji G5. The first-stage switching power supply converts more than 500 volts of DC voltage on the DC bus side to more than 300 volts DC voltage. Then through the secondary coil of high-frequency pulse transformer output 5V, 12V, 24V and other lower voltage for the inverter control board, drive circuit, detection circuit, etc. to do the power use. In the design of the second-stage switching power supply, Yaskawa uses a controlled voltage regulator called TL431 to adjust the duty cycle of the switching transistor so as to stabilize the output voltage. The LG inverters we talked about in previous sessions also use similar control methods. The QM5HL-24 and TL431, which are used as switch tubes, are all relatively easy to damage. In addition, if we hear harsh screams during use, this is caused by a pulse transformer. It is very likely that there is a short circuit on the output side of the switching power supply. We can find the fault from the output side. In addition, when there is no display, the control terminal has no voltage, DC12V, 24V fan does not run, we should first consider whether the switching power supply is damaged.
2 SC failure
SC failure is a common failure of Yaskawa's inverters. The IGBT module is damaged, which is one of the causes of SC fault alarm. In addition, damage to the driver circuit can easily lead to SC fault alarm. Yaskawa designed the driver circuit. The bridge used a driver optocoupler PC923. This is an optocoupler with an amplifier circuit dedicated to driving IGBT modules. Yaskawa's lower bridge driver circuit uses an optocoupler PC929. It is an optocoupler with internal amplifier circuit and detection circuit. In addition, the motor shakes, the three-phase electric current, the voltage is unbalanced, but there is no voltage output with the frequency display, these phenomena all may damage the IGBT module. There are many reasons for the damage of the IGBT module. The first is the failure of the external load and causes damage to the IGBT module such as short-circuiting and blocking of the load. Secondly, the aging of the drive circuit may also cause the distortion of the drive waveform, or the drive voltage may fluctuate too much and cause damage to the IGBT, resulting in an SC fault alarm.
3 OH—Overheating Overheating is a failure that you would normally encounter. When encountering this kind of situation, first will think whether the cooling fan is running, observe the outside of the machine will see whether the fan is running, in addition to 30kW or more machines also have a cooling fan inside the machine, the damage of this fan will also lead to OH alarm.
4 UV-undervoltage fault When an undervoltage fault occurs, the input power should first be checked for phase loss. If there is no problem with the input power, then we must check whether the rectifier circuit has any problem. If there is no problem, it depends on the DC detection circuit. Is there a problem? For 200V-class machines, when the DC bus voltage is lower than 190VDC, a UV alarm will occur; for a 400V-class machine, a fault alarm occurs when the DC voltage is lower than 380VDC. The main test is whether the buck resistor is open circuited.
5 GF—Ground fault Ground fault is also a fault that will be encountered in peacetime. Excluding the causes of motor ground fault, the most likely fault part is the Hall sensor. Hall sensor is affected by environmental factors such as temperature and humidity. , The working point is very easy to drift, leading to GF alarm.

Yaskawa Inverter 606V7 series fault code detailed table

Fault Code Symptom/Type Fault Cause Solution
Bb BB (external base lock) After the external base lock is received, the inverter output is shut off (Note: Operation restarts after the external basic delay is released) Check the external circuit (sequencer)
EF EF (forward rotation and reverse rotation command input at the same time) The forward and reverse commands of the control circuit terminal are both "closed" at the same time.
When 500ms or more is "closed", the setting selected by the stop method (parameter n005) The inverter stops checking the external circuit (sequencer)
SrP STP (operator stop) When the STOP/RESET key of the operator is pressed during forward or reverse rotation of the control circuit terminal, the inverter will stop according to the stop method setting (n005).
STP (emergency stop) An emergency stop alarm signal is received and the inverter will set the stop method (n005) Stop • Set the forward rotation reverse command of the control circuit terminal to "ON"
• Check the external circuit (sequencer)
FRn FAN (Cooling fan is abnormal) The cooling fan is stuck • Check the cooling fan • Check the wiring of the cooling fan
CE CE (MEMOBUS) Communication abnormal communication data cannot be checked normally Communication equipment, communication signal
FbL FBL (detection of loss of PID feedback) PID feed, below the loss detection value (n137)
After the loss of the PID feedback value is detected, the operation status of the machine is checked according to the setting contents of the parameter n136, and the cause is eliminated, or the set value (parameter n137) is increased until the mechanical allowable value is reached.
bUS selection card communication error, operation command or frequency command setting mode from the communication selection card, communication error occurred Check the communication selection card, communication signal

oC OC (Overcurrent) About 250 (%) of the inverter output current exceeds the rated current (instantaneous operation)
• Inverter output is short-circuited and grounded • Load GD2 is too large • Acceleration/deceleration time is set too short (parameters n019 to 022)
• Use of a special motor • Starting of a motor with free deceleration • Reset after checking the cause of opening and closing of an electromagnetic contactor on the output side of the inverter

Ov OV (overvoltage in the main circuit) Due to too much feedback energy of the motor, the main circuit DC voltage exceeds the voltage detection value:
• Detection value: Stop when the main circuit DC voltage of 200V class exceeds about 410V

• Stop at 400V class main circuit DC voltage above 820V • Set the deceleration time too short (parameter n020,022)
• The regeneration load is too high when the lift descends

• Increase deceleration time • Install control resistor (optional)
Uv1 UV1 (main circuit low voltage) Main circuit voltage is lower than the low voltage detection value during inverter operation • Stops when 200V main circuit DC voltage is below approximately 200V (stops when the single phase is less than approximately 160V)
• Stop at 400V class main circuit DC voltage below about 400V • Low input supply voltage • Phase loss • Instantaneous power failure • Check supply voltage • Check main circuit power supply wiring • Check for loose terminal screws
Uv2 UV2 (abnormal control power supply) When abnormality in the control power supply is detected. Once the power is turned off and the resumption error continues to occur, replace the inverter's screws for looseness.
oH OH (heating of cooling radiating seat) Inverter is overloaded Operating temperature rises or inlet air temperature rises • Load too high • V/f characteristics are not good • When accelerating, set time is too short • Intake air temperature exceeds 50°C
• Cooling fan stops • Checks the load size • Checks the V/f setting (parameters) (n011 to n017)
• Check the inlet air temperature
oL1 OL1 (motor overload) Inverter thermal electronic protection for motor overload protection • Check load br /> ? Line curve V/f setting (n011 to 017)
• Set the motor nameplate rated current to parameter n036
oL2 OL2 (inverter overload) Inverter thermal electronic protection for overload protection • Check load br /> ? Line curve V/f setting (n011 to 017)
• Reset the inverter capacity
0L3 OL3 (Over torque detection) In V/f mode: The inverter output current exceeds the over-torque detection value.
(n098) Vector mode: The output current and output torque exceed the over-torque detection value (n097,098) When over-torque is detected, check the operation status of the machine according to the parameter n096 setting action, eliminate the cause, or set Fixed value increased to the allowable value of the machine (n098)
F00 CPF-00 After 5 seconds after the power is turned on, communication with the operator cannot be established and the power is cut off. After confirming the installation status of the operator, when the power supply abnormality continues to occur, replace the operator or inverter.
After transmission of F01 CPF-01 and the operator is started, the transmission abnormality occurs for more than 5 seconds. Cut off the power. Check the installation status of the operator. When the power supply error continues to occur, replace the operator or the inverter.
F04 CPF-04 Inverter control circuit EEPROM fault record all parameters, initialize the parameters (initialization of parameter reference page 36) When the power is turned off and confirm the installation status of the operator, and then access power abnormality continues to occur, replace the operator or frequency conversion Device
F05 CPF- 05 Inverter control circuit A/D converter failure Turn off the power and then re-insert it. When the abnormality continues to occur, replace the inverter.
F06 CPF -06
• Bad contact of the selected card • When the selected card with an inconsistent square No. is connected Disconnect the power supply. Connect the optional card correctly. Then confirm the software No. (n179) of the inverter.
Fault Code Symptom/Type Fault Cause Solution
F07 CPF- 07 operator control circuit (EEPROM, A/D converter failure) When the power is turned off and the operator is connected, if the input abnormality continues to occur, replace the operator or inverter.
F21 Communication Select Card's Own Diagnostic Failure Exchange Communication Select Card
F22 Communication Option Card Model Number Failed Communication Communication Select Card
F23 Mutual Diagnosis of Communication Option Cards Bad Exchange Communication Select Card