explosion proof VFD,HazLoc softstarter, motor soft starter, vector control variable speed drive (VSD, variable frequency drive, AC drive, inverter), reactor, sine wave filters, power electronics: quality as ABB, Siemens.

	Home \|About \|Products \|Application \|Clients & References \|News \|Support \|FAQ \|Contact
Translate

Common faults and solutions of V&T EcoDriveCN® inverters (AC drives)

Fault No.	Fault code	Fault description	Potential causes	Solutions
		no display on operation panel after power on	R\S\T terminal without input terminal	Use a multi-meter to check input power whether it's normal
			Operation panel is abnormally connected with control board	Check the connecting line between operation panel and control board
			Operation panel extension line abnormal	Replace operation panel extension line
			Inverter 75kW and below power class without short circuited with copper bus Inverter 90kW and above power class without connecting DC reactor	Inverter 75kW and below power class should short circuited with copper bus between +1 and +2 terminal, Inverter 90kW and above power class should connecting DC reactor between +1 and +2 terminal
			Flat cable of control board poor contact	Flat cable between control board and function board should be sonnected reliable.
	8.8.8.8	Operation panel display 8.8.8.8	Operation panel abnormal connect with control board	Check the connecting line between operation panel and control board
			Operation panel extension line abnormal	Replace operation panel extension line
			Operation panel extension line wiring is incorrect	Please check the wiring is correct
			Handshaking failed between inverter and host computer	Please check the communication protocol
1	E.oc1	Over current protection when acceleration operation	Low grid voltage	Check input power supply
			Startup too fast during motor rotating	Restart after the motor stops rotating
			Rotating inertial of load is too large and shock load is very heavy	Increase the acceleration time and reduce the occurrences of sudden change of load
			Improper setting of motor parameters	Set motor parameters properly
			Set start-up frequency too high	Decrease start-up frequency
			Acceleration time is too short	Lengthen acceleration time
			V/F curve ratio too large	Adjust V/F curve setting and torque boost
			Power class of inverter is small	Replace with inverter with proper model
2	E.oc2	Over current protection when deceleration operation	Low grid voltage	Check input power supply
			Rotating inertial of load is too large	Choose appropriate energy braking components
			Improper setting of motor parameters	Set motor parameters properly
			Deceleration time is too short	Lengthen deceleration time
			Power level of inverter is small	Replace to inverter with proper model
3	E.oc3	Over current protection when operation with constant speed	Sudden change of load during operation	Decrease load's abrupt frequency change and amplitude
			Improper setting of motor parameters	Set motor parameters properly
			Power level of inverter is small	Replace to inverter with proper model
4	E.oV1	Over voltage protection when acceleration operation	Motor short to ground	Check motor wiring
			Abnormal input power supply voltage	Check input power supply
			Fast start-up again when motor operates with high speed	Start again after the motor stop rotating
5	E.oV2	Over voltage protection when deceleration operation	Motor short to ground	Check motor wiring
			Rotating inertial of load is too large	Choose appropriate energy braking components
			Deceleration time is too short	Lengthen deceleration time
6	E.oV3	Over voltage protection when operation with constant speed	Motor short to ground	Check motor wiring
			Abnormal input power supply	Check input power supply
			Rotating inertial of load is too large	Choose appropriate energy braking components
7	E.PCU	Interference protection	Severely Interfered by exterior signal	Ask professional technicians to maintain
8	E.rEF	Abnormal comparison benchmark	Loose connection of connectors inside the inverter	Seek for technical support
			Abnormal internal switching power supply	Seek for technical support
			Abnormal signal sampling and comparison circuit	Seek for technical support
9	E.AUt	Auto-tuning fault	Enable auto-tuning function during motor spining	Perform auto-tuning after the motor stops to rotate
			Auto-tuning overtime	Check whether motor wirings are well connected Length of motor wiring within 100m

			Incorrect setting of motor parameters in group P9	Please reset the parameters according to the nameplate parameters on the motor
10	E.FAL	Module protection	Output over current	Check whether the motor the output connection are short circuited, whether the ground is short circuited and whether the load is too heavy
			DC terminal overvoltage	Check the mains power supply and whether the large inertia load has no function of quick stop at energy consumption brake.
			Loose connection of connectors inside the inverter	Ask professional technicians to maintain
11	E.oH1	Heatsink 1 over temperature protection	Ambient over-temperature	Lower the ambient temperature and strengthen ventilation and radiation
			Blockage of air duct	Clean the dusts, wools and other foreign objects in the air duct
			Fan failure	Check whether fan wirings are well connected. Replace a new fan of the same model.
			Inverter module failure	Seek for technical support
			Temperature detection circuit failure	Seek for technical support
12	E.oH2	Heatsink 2 over temperature protection	Ambient over-temperature	Lower the ambient temperature and strengthen ventilation and radiation
			Blockage of air duct	Clean the dusts, wools and other foreign objects in the air duct
			Fan failure	Check whether fan wirings are well connected. Replace a new fan of the same model
			Rectifier module failure	Seek for technical support
			Temperature detection circuit failure	Seek for technical support
13	E.oL1	Inverter (drive) overload protection	Input power under voltage	Check input power supply
			Fast start-up when motor operates with high speed	Start again after the motor stop rotating
			Keep overloading for a long period of time	Shorten the overloading time and reduce load
			Acceleration and deceleration time is too short	Prolong the acceleration/deceleration time
			V/F curve ratio is set too large	Adjust V/F curve setting and torque boost
			Power level of inverter is small	Replace to inverter with proper model
14	E.oL2	Motor overload protection	Input power under voltage	Check input power supply
			Motor rotation is blocked or load mutation occurs	Prevent the motor rotation from blocking and reduce the load mutation
			Common motor maintains running under heavy load for a long period of time	Replace the common motor with variable frequency motor or improve the running frequency
			Motor overload protection time is set too small	Increase the motor overload protection time
			V/F curve ratio is set too large	Adjust V/F curve setting and torque increment
			DC braking current is set too high	Reduce the DC brake current
15	E.oUt	Peripheral protection	External failure terminal enable	Check the external failure terminal status
			The speed incorrect because over current when acceleration	Check whether the external load is normal
			The speed incorrect because over current when deceleration	Check whether the external load is normal
			Over voltage protrection because the speed incorrect	Check whether the external load is normal
			The speed incorrect because over current or over voltage, and last more than 1 minute.	Check whether the external load is normal
19	E.CUr	Current detection abnormal	Current detection circuit failure	Seek for technical support
20	E.GdF	Output to ground short circuit	Wrong connection	Correct the connection error as per the user's manual
			Motor abnormal	Replace the motor after performing ground insulation test
			Invert module failure	Seek for technical support
			Ground leakage current at the output side of the inverter is too high	Seek for technical support
21	E.LV1	Abnormal power failure during running	Mains power fluctuation or momentary power failure	Check the local mains power
22	E.ILF	Input power failure	There is abnormal connection, missing connection or disconnection at the power terminal of the inverter	Check the power connections as per the operational regulations and eliminate the errors of missing connection and disconnection
			Serious unbalance of three phases input power	Check whether the unbalance of three phases comply with the requirements
			Burning of capacitor of the inverter	Seek for technical support
			The power-on buffer circuit of the inverter is faulty	Seek for technical support
23	E.oLF	Abnormal output phase	There is abnormal connection, missing connection or disconnection at the output side of the inverter	Check the power connections at the output side of the inverter as per the operational regulations and eliminate the errors of missing connection and disconnection
23	E.oLF	Abnormal output phase	Unbalance of output three phases	Check whether motor is kept well Shut down the power supply to check whether the terminal characteristics both at the output side and DC side of the inverter are consistent
24	E.EEP	EEPROM failure	EEPROM reading and writing failure	Seek for technical support
25	E.dL3	Relay contact failure	Loose connection of connectors inside the inverter	Ask professional technicians to maintain
25	E.dL3	Relay contact failure	The power-on buffer circuit is faulty	Seek for technical support
26	E.dL2	Temperature sampling disconnection	Ambient under temperature	Check whether the ambient temperature complies with the requirements
26	E.dL2	Temperature sampling disconnection	The temperature sampling circuit inside the inverter is faulty	Seek for technical support
27	E.dL1	Encoder cable disconnection	Encoder connection is incorrect	Change the encoder cable connection
			Encoder has no signal output	Check whether the encoder and power supply are normal
			Encoder cable disconnection	Reconnect
			Abnormal function code setting	Confirm that the relevant function codes of the encoder are set properly
28	E.P10	+10V power output abnormal	+10V power overload	Increase +10V power load impedance Utilize externally independent power supply
			+10V power supply and GND is short circuited	Eliminate the short circuit failure
			+10V power terminal circuit failure	Seek for technical support
29	E.AIF	Analog input abnormal	Analog input voltage is too high	Check whether the analog input voltage complies with the requirements
			Analog input circuit failure	Seek for technical support
			Analog input circuit signal interfered	Increase the P6.22～P6.24 AI filtering time
30	E.Ptc	Motor over temperature（PTC）	The motor temperature signal reaches the alarm setting value	Strengthen ventilation and radiation
			Thermistor resistance failure	Check the thermistor
			The sensor protection threshold of the motor is set improperly	Adjust the sensor protection threshold of the motor
31	E.SE1	Communication abnormal 1 (Operation panel 485)	The communication of operation panel 485 is disconnected	Check the connection of the equipment communications
			The communication of operation panel 485 is faulty	Check whether the data receiving and transmission complies with the protocol, whether the check sum is correct and whether the receiving and transmission interval complies with the requirements
			The inverter is set to master mode	Set the inverter to slave mode
32	E.SE2	Communication abnormal 2 (Terminal 485)	The communication of terminal 485 is disconnected	Check the connection of the equipment communications
			The baud rate is set improperly	Set compatible baud rate
			The communication of terminal 485 is faulty	Check whether the data receiving and transmission complies with the protocol, whether the check sum is correct and whether the receiving and transmission interval complies with the requirements
			The communication of terminal 485 is time-out	Check whether the communication timeout is set properly and confirm the communication cycle of the application program
			The failure alarm parameter is set improperly	Adjust the failure alarm parameter
			The inverter is set to master mode	Set the inverter to slave mode
33	E.VEr	Version compatibility abnormal	The software version of the operation panel is incompatible	Seek for technical support
34	E.CPy	Copy failure	The data error appears when copying the inverter parameters to the operation panel	Check the connections of the operation panel
			The data error appears when copying the parameters from the operation panel to the inverter	Check the connections of the operation panel
			The parameters are directly downloaded without undergoing copy and upload operations	Perform download before uploading the parameters
			Control board software version incompatible	Check if d1.09 is consistent
36	E.dL4	Expansion card connection abnormal	Expansion card connection is loosened	Ask professional technicians to maintain
36	E.dL4	Expansion card connection abnormal	Expansion card failure	Seek for technical support
37	E.IoF	Terminal mutual exclusion check failed	The functions of X1 to X7, AI1, AI2 and DI terminals are set in a repeated manner	Modify the settings of X1 to X7, AI1, AI2 and DI terminals and ensure the setting functions are not repeated (excluding null function)
37	E.IoF	Terminal mutual exclusion check failed
38	E.oL3	Hardware overload protection	Load failure	Check whether motor is blocked Replace inverter with proper model
			Input failure	Check whether there is phase loss
			Output failure	Check whether there are phase loss or short circuit
63	−LU−	Power under voltage	The power voltage is lower than the minimum operating voltage of the equipment	Check input power supply
			Input power terminal is not connected tightly	Tightening the input power terminals Use the multimeter to measure the input power and DC bus voltage
			If starting LU failure appeared	Please check the grid capacity
			Flat cable of control board poor contact	Please check the flat cable connecting
			Abnormal internal switching power supply	Seek for technical support

Photo Gallery |CE certificate |superb components

Our Expertise Is Your Guarantee!

Leading manufacturer and supplier industrial automation, motor control, motion control and energy efficiency.