Emotron VS Series Drive Fault Codes List

Having trouble with your Emotron VS Series AC drive? Learn how to troubleshoot ErrXX fault codes, configure protection actions, and reset the drive safely.

The Emotron VS Series (designed by CG Drives & Automation) is a robust line of general-purpose AC motor drives built for versatile industrial and commercial applications . To protect the motor, power cabling, and the internal electronics, these drives incorporate real-time monitoring and a detailed self-diagnostic framework.

Emotron VS Series Fault Codes Reference Table

Refer to your specific diagnostic tables to identify the exact ErrXX fault or alarm code displayed on the HMI screen to pinpoint the system issue.

Fault Code	Description, Causes, and Solutions
Err01	Err01 fault indicates Accel overcurrent. This means the inverter's output current has exceeded the safe threshold during the motor's acceleration phase. Possible Causes: 1: The output circuit is grounded or short circuited. 2: The acceleration time is too short. 3: Manual torque boost or V/F curve is not appropriate. 4: The voltage is too low. 5: The startup operation is performed on the rotating motor. 6: A sudden load is added during acceleration. 7: The AC drive model is of too small power class. Solutions: 1: Eliminate external faults. 2: Increase the acceleration time. 3: Adjust the manual torque boost or V/F curve. 4: Adjust the voltage to normal range. 5: Select rotational speed tracking restart or start the motor after it stops. 6: Remove the added load. 7: Select an AC drive of higher power class.
Err02	Err02 fault indicates Decel overcurrent. This means the inverter's output current has exceeded the safe threshold during the motor's deceleration phase. Possible Causes: 1: The output circuit is grounded or short circuited. 2: The deceleration time is too short. 3: The voltage is too low. 4: A sudden load is added during deceleration. 5: The braking unit and braking resistor are not installed. Solutions: 1: Eliminate external faults. 2: Increase the deceleration time. 3: Adjust the voltage to normal range. 4: Remove the added load. 5: Install the braking unit and braking resistor.
Err03	Err03 fault indicates Constant-speed overcurrent. This means the inverter's output current has exceeded the safe threshold while the motor was operating at a steady, constant speed. Possible Causes: 1: The output circuit is grounded or short circuited. 2: The voltage is too low. 3: A sudden load is added during operation. 4: The AC drive model is of too small power class. Solutions: 1: Eliminate external faults. 2: Adjust the voltage to normal range. 3: Remove the added load. 4: Select an AC drive of higher power class.
Err04	Err04 fault indicates Accel overvoltage. This means the drive's internal DC bus voltage has risen above the maximum safe limit during motor acceleration. Possible Causes: 1: The input voltage is too high. 2: An external force drives the motor during acceleration. 3: The acceleration time is too short. 4: The braking unit and braking resistor are not installed. Solutions: 1: Adjust the voltage to normal range. 2: Cancel the external force or install a braking resistor. 3: Increase the acceleration time. 4: Install the braking unit and braking resistor.
Err05	Err05 fault indicates Decel overvoltage. This means the drive's internal DC bus voltage has risen above the maximum safe limit during motor deceleration. Possible Causes: 1: The input voltage is too high. 2: An external force drives the motor during deceleration. 3: The deceleration time is too short. 4: The braking unit and braking resistor are not installed. Solutions: 1: Adjust the voltage to normal range. 2: Cancel the external force or install the braking resistor. 3: Increase the deceleration time. 4: Install the braking unit and braking resistor.
Err06	Err06 fault indicates Constant-speed overvoltage. This means the inverter's internal DC bus voltage exceeded the safe limit while the motor was operating at a steady, constant speed. Possible Causes: 1: The input voltage is too high. 2: An external force drives the motor during deceleration. Solutions: 1: Adjust the voltage to normal range. 2: Cancel the external force or install the braking resistor.
Err07	Err07 fault indicates Bus undervoltage. This means the DC bus voltage has dropped below the minimum threshold required for proper inverter operation. Possible Causes: 1: Instantaneous power failure occurs on the input power supply. 2: The AC drive's input voltage is not within the allowable range. 3: The bus voltage is abnormal. 4: The rectifier bridge and buffer resistor are faulty. 5: The drive board is faulty. 6: The main control board is faulty. Solutions: 1: Reset the fault. 2: Adjust the voltage to normal range. 3: Contact the agent or CG.
Err08	Err08 fault indicates Short circuit. This means there is an abnormally high current flow due to a direct connection between phases or to ground, bypassing the normal load. Possible Causes: 1: The output circuit is grounded or short circuited. 2: The connecting cable of the motor is too long. 3: The module overheats. 4: The internal connections become loose. 5: The main control board is faulty. 6: The drive board is faulty. 7: The inverter module is faulty. Solutions: 1: Eliminate external faults. 2: Install a reactor or an output filter. 3: Check the air filter and the cooling fan. 4: Connect all cables properly. 5: Contact the agent or CG.
Err09	Err09 fault indicates Power input phase loss. This means that one or more phases from the main AC power supply feeding the inverter are missing or disconnected. Possible Causes: 1: The three-phase power input is abnormal. 2: The drive board is faulty. 3: The lightening board is faulty. 4: The main control board is faulty. Solutions: 1: Eliminate external faults. 2: Contact the agent or CG.
Err10	Err10 fault indicates Power output phase loss. This means there is a missing or disconnected phase in the power being delivered from the inverter to the motor. Possible Causes: 1: The cable connecting the AC drive and the motor is faulty. 2: The AC drive's three-phase outputs are unbalanced when the motor is running. 3: The drive board is faulty. 4: The module is faulty. Solutions: 1: Eliminate external faults. 2: Check whether the motor Three-phase winding is normal. 3: Contact the agent or CG.
Err11	Err11 fault indicates Motor overload. This means the motor is drawing current exceeding its thermal or operational capacity for an extended period. Possible Causes: 1: E0-17 is set improperly. 2: The load is too heavy or locked-rotor occurs on the motor. 3: The AC drive model is of too small power class. Solutions: 1: Set E0-17 correctly. 2: Reduce the load and check the motor and the mechanical condition. 3: Select an AC drive of higher power class.
Err12	Err12 fault indicates Inverter overload. This means the inverter is outputting a current beyond its rated capacity for a duration that exceeds its safe limits. Possible Causes: 1: The load is too heavy or locked-rotor occurs on the motor. 2: The AC drive model is of too small power class. Solutions: 1: Reduce the load and check the motor and mechanical condition. 2: Select an AC drive of higher power class.
Err13	Err13 fault indicates External equipment fault. This means the drive has received a fault signal from external equipment via its digital inputs (DI). Possible Causes: 1: External fault signal is input via DI. Solutions: 1: Reset the operation.
Err14	Err14 fault indicates Module overheat. This means the internal temperature of the inverter module has exceeded its safe operating limit. Possible Causes: 1: The ambient temperature is too high. 2: The air filter is blocked. 3: The fan is damaged. 4: The thermally sensitive resistor of the module is damaged. 5: The inverter module is damaged. Solutions: 1: Lower the ambient temperature. 2: Clean the air filter. 3: Replace the damaged fan. 4: Replace the damaged thermally sensitive resistor. 5: Replace the inverter module.
Err15	Err15 fault indicates EEPROM read/write fault. This means there is a hardware failure or data corruption issue with the inverter's internal memory chip. Possible Causes: 1: The EEPROM chip is damaged. Solutions: 1: Replace the main control board.
Err16	Err16 fault indicates Motor auto-tuning cancelled. This means the motor parameter identification process was manually interrupted by the user. Possible Causes: 1: Since the identification process, press STOP / RST key. Solutions: 1: Press STOP / RST key to reset.
Err17	Err17 fault indicates Motor auto-tuning fault. This means the drive encountered an error while trying to automatically measure and identify the motor's parameters. Possible Causes: 1: The motor and the inverter output terminals are not connected. 2: The motor does not disengage the load. 3: The electrical fault. Solutions: 1: Check the connection between the inverter and motor. 2: The motor is disengaged load. 3: Check the motor.
Err18	Err18 fault indicates Communication overtime error. This means the drive has lost communication with the connected PC or master device for a duration longer than the set timeout limit. Possible Causes: 1: The PC is not working properly. 2: The communication line is not normal. 3: H0 set communication parameters set incorrectly. Solutions: 1: Check the PC Connection. 2: Check the communication cable. 3: The communication parameters are set correctly.
Err19	Err19 fault indicates PID feedback loss. This means the active feedback signal for the PID controller has dropped below the minimum allowable threshold. Possible Causes: 1: PID feedback set value is less than F0.24. Solutions: 1: Check the PID feedback signal or set to an appropriate value F0.24.
Err20	Err20 fault indicates Continuous running time reached. This means the inverter has operated continuously for the duration specified by its running time limit parameter. Possible Causes: 1: Set the running time to reach this function. Solutions: 1: Refer C1.14 Description.
Err21	Err21 fault indicates Parameter upload fault. This means an error occurred while trying to copy or upload parameters from the inverter to an external parameter copy card. Possible Causes: 1: Is not installed or is not plugged parameter copy card. 2: Parameter copy card abnormalities. 3: The control board abnormalities. Solutions: 1: A copy of the card is properly installed parameters. 2: Contact for technical support.
Err22	Err22 fault indicates Parameter download fault. This means an error occurred while trying to copy or download parameters from the external copy card to the inverter. Possible Causes: 1: Is not installed or is not plugged parameter copy card. 2: Parameter copy card abnormalities. 3: The control board abnormalities. Solutions: 1: A copy of the card is properly installed parameters. 2: Contact for technical support.
Err23	Err23 fault indicates Braking unit fault. This means there is an issue detected in the braking circuit, external resistor, or associated hardware. Possible Causes: 1: The brake line failure or damage the brake pipe. 2: An external braking resistor is too small. Solutions: 1: Check the brake unit, replace the brake pipe. 2: Increasing the braking resistor.
Err24	Err24 fault indicates Module temperature detection disconnection. This means the drive has lost the signal from its internal temperature monitoring sensor, usually due to a physical break. Possible Causes: The temperature sensor failure or cable break. Solutions: Contact for technical support.
Err25	Err25 fault indicates Load becoming 0. This means the current drawn by the motor has dropped below the threshold defined by parameter E0.22, indicating a possible loss of load (like a broken belt or dry pump). Possible Causes: The AC drive running current is lower than E0.22. Solutions: Check that the load is disconnected or the setting E0-22 and E0-23 is correct.
Err26	Err26 fault indicates With-wave current limit fault. This means the drive's output current has hit the strict hardware current limit, often due to a severe overload or a stalled motor condition. Possible Causes: 1: The load is too heavy or locked rotor occurs on the motor. 2: The AC drive model is of too small power class. Solutions: 1: Reduce the load and check the motor and mechanical condition. 2: Select an AC drive of higher power class.
Err27	Err27 fault indicates Inverter soft-start relay is off. This means the soft-start bypass relay inside the inverter failed to close properly, likely due to insufficient incoming power or a hardware failure. Possible Causes: 1: The grid voltage is too low. 2: Rectifier module failure. Solutions: 1: Check the grid voltage. 2: Demand for technical support.
Err28	Err28 fault indicates Software version compatibility fault. This means there is a mismatch between the firmware versions of the main control board and the display/control panel. Possible Causes: 1: The upper and lower transmission module parameters in the parameter version of the control panel version mismatch. Solutions: re-upload module parameters to pass down.
Err29	Err29 fault indicates Instantaneous overcurrent. This means there was a sudden, massive spike in output current exceeding the hardware protection limit, usually caused by a short circuit or extreme sudden load. Possible Causes: 1: Inverter output circuit being grounded or short-circuit; 2: The acceleration and deceleration time is too short; 3: Manually torque boost or V/F curve not appropriate; 4: Voltage too low; 5: Start the running motor; 6: Sudden-load in the acceleration process; 7: Model selection of inverter power is too small. Solutions: 1: Troubleshooting peripheral problems; 2: To increase the acceleration time; 3: Adjust the manually torque boost or V/F curve; 4: Adjust the voltage to normal range; 5: Select RPM track start or start after motor stopped; 6: Cancel sudden-load; 7: Select the inverter with higher rating.
Err30	Err30 fault indicates Instantaneous overvoltage. This means a sudden, extreme spike in the internal DC bus voltage was detected, exceeding the maximum safe limit. Possible Causes: 1: Input voltage is too high; 2: There is external force drag the motor to run in deceleration process; 3: The deceleration time is too short; 4: No installation of braking resistor. Solutions: 1: Adjust the voltage to normal range; 2: Cancel external force or install brake resistor; 3: To increase the deceleration time; 4: Install braking resistor.
Err39	Err39 fault indicates Motor temperature too high. This means the motor's internal temperature, as read by the connected PTC sensor, has exceeded the configured protection threshold. Possible Causes: 1: PTC sensor configuration not right. 2: Motor temperature protection value too small. 3: Motor temperature too high. Solutions: 1: Reset PTC sensor parameter. 2: Increase motor temperature protection value. 3: Wait until motor is cooled.
Err40	Err40 fault indicates The set running time ends. This means the drive's internal timer has reached the maximum allowed continuous running time configured in the parameters. Possible Causes: 1: Running time more than A0.25. Solutions: 1: Contact the dealer.
Err41	Err41 fault indicates Overload warning. This means the drive's output current has exceeded the pre-set overload warning threshold (E0.19) triggering a warning alert. Possible Causes: 1: when E0.18 = 00100 and the current output amp is more than E0.19. Solutions: 1: Check the current load.
A33	A33 fault indicates Pre-warning of Weak Light. This means the drive's output frequency has remained at or below the lower limit of the PI output for longer than the set delay time, indicating a low-energy/weak light condition. Possible Causes: Output frequency is lower than or equal with lower limit of PI output frequency, and has continued under this state for a duration greater than delay time of weak light. Solutions: Check the lower limit of PI output frequency and weak-light delay the set value.
A34	A34 fault indicates Pre-warning of Full-water. This means the water-level feedback signal has stayed below the set threshold for longer than the allowed delay time, triggering a full-water pre-warning. Possible Causes: Water-level feedback is lower than the set threshold and has continued under this state for a duration greater than the delay time. Solutions: Check the pre-warning point of water level.

Retrieving Detailed Fault History

If the drive has tripped and the fault has been cleared, you can retrieve diagnostic details and historical logs from the drive's memory using Group U1 (Diagnostics/Monitoring Parameters) on the keypad :

• Parameter U1.01: Stores the exact running frequency at the moment the latest fault occurred .
• Parameter U1.13: Logs the DC bus voltage when the before-previous fault occurred .
• Parameter U1.14: Records the cumulative running hours when the before-previous fault occurred .

Configuring Protective Actions (Group E0 Parameters)

The Emotron VS Series allows operators to customize how the drive responds to specific non-destructive faults (such as undervoltage, phase loss, or motor overload) using Group E0 Protection Parameters .

Under parameters E0.10, E0.11, and E0.12, you can program the drive’s behavior to one of these options :

• Coast to Stop: Displays the Err** code and stops the motor instantly .
• Decelerate to Stop: Displays a warning code, decelerates according to the configured stop mode, and then triggers the hard Err** fault .
• Continue to Run: Displays a warning code (e.g., A**) but continues running at a specific fallback frequency set in parameter E0.14 .

How to Safely Reset an Emotron VS Series Fault

Before clearing a fault, ensure that the mechanical or electrical root cause has been thoroughly investigated and resolved . The drive can be reset using one of three standard methods :

1. Keypad Reset: Press the red STOP/RESET key directly on the front panel .
2. Digital Input Reset: If one of your control terminal inputs is assigned to the reset function, apply a momentary transition signal to clear the trip .
3. Power Cycle (Power-On Reset): Disconnect the main AC power supply . Safety Requirement: High residual DC bus voltage remains stored in the capacitors . You must wait at least 10 minutes to allow the internal capacitors to fully discharge before handling any wiring or restoring power .

Most Common Emotron VS Faults and Troubleshooting

While the internal diagnostics monitor many protections, several common codes represent the majority of field trips :

1. Err01 / Err02 / Err03 (Output Overcurrent)

These codes trigger when output current spikes beyond safety limits during acceleration (Err01), deceleration (Err02), or constant-speed operation (Err03) .

• Diagnostic: Check for a mechanical jam in the driven motor load . Inspect the output wiring and motor windings for insulation breakdown or phase-to-ground short circuits . If the fault occurs instantly on start-up with the motor disconnected, the drive’s internal power module (IGBT) may require service.

2. Err07 (Bus Undervoltage)

This trip occurs when the DC link bus voltage drops below the minimum safe operating threshold .

• Diagnostic: Check the incoming line voltage with a digital multimeter . Verify that the input power fuses are intact and that all power terminals are tight.

3. Err09 & Err10 (Input / Output Phase Loss)

These codes point to an electrical disconnect or severe phase imbalance :

• Err09 (Input Phase Loss): Indicates that one of the incoming AC power phases is missing or unstable .
• Err10 (Output Phase Loss): Indicates a disconnect in the cables running from terminals U, V, or W to the motor . Check the motor contactors and verify motor winding continuity.

4. Err11 & Err12 (Motor Overload / Inverter Overload)

These thermal faults indicate that either the motor (Err11) or the inverter (Err12) has been operating beyond its nominal current rating for too long, raising internal temperatures .

• Diagnostic: Ensure that your motor parameters match the motor’s nameplate ratings . Check for physical mechanical binding or locked-rotor conditions on the driven machinery.

Best Practices to Avoid VS Series Drive Trips

To ensure consistent operation and prolong the life of your Emotron VS drive, consider establishing a proactive preventive maintenance routine:

• Clean the Heatsink and Fans: Thermal overtemperature faults (e.g., Err14 or Err24) are often triggered by dust or debris restricting cooling airflow . Periodically clean the heatsink fins and ensure the cooling fans are functioning properly .
• Verify Wiring Torques: Thermal cycling and mechanical vibration can loosen power and ground terminal screws over time. Periodically check and retorque all incoming mains and motor output connections to prevent phase loss or hot joints.

By understanding what the Emotron VS Series is communicating through its display codes and maintaining stable operating conditions, you can optimize system uptime and reliability.