Wilo VeroLine and VeroTwin Pumps

Three consecutive red flashes of the LED typically indicate a communication error between system components.

The menu number <6.0.0.0> flashes on the display, indicating the system is ready to acknowledge an error after a waiting period.

The menu number <6.0.0.0> is displayed steadily, showing the remaining time before the error can be acknowledged. The motor remains off.

An amber blinking light usually signifies that the device is in a standby mode, waiting for input, or processing a command.

An unspecified error has occurred. The display shows 'E' and a three-digit error code. The error page is shown instead of the normal status page.

The voltage supplied to the pump is lower than the acceptable operating range. This can affect pump performance and longevity.

The voltage supplied to the pump is higher than the specified operating range. Excessive voltage can damage the pump's electronics.

The pump is operating with only two phases of power instead of the required three (or expected two for single-phase units), indicating a missing phase.

This is a warning that the flow of fluid is actually turning the pump impeller, causing it to act like a generator and feed power back into the mains. Prolonged operation in this state can damage the electronic module.

The pump shaft is mechanically blocked, preventing it from rotating freely. The pump will shut down if the blockage isn't cleared within 10 seconds.

The motor windings are overheating, likely due to the motor being overloaded. The pump will stop to cool down.

This error means the pump is drawing too much electrical power, which could damage the motor or electronics. The system automatically shuts off the pump to protect itself if this condition lasts for over a minute. This is not an error in the electronic module itself.

A short circuit or earth leakage fault has been detected, indicating a potential defect in the motor or electronic module.

The display shows 'E' followed by '025'. This indicates a specific error condition that requires acknowledgement.

The connection to the WSK (Winter Service Kit) or PTC (Positive Temperature Coefficient) sensor has been interrupted, usually indicating a motor fault.

The electronic module is overheating due to restricted airflow to its heat sink.

The temperature in the hybrid or power section of the electronic module is too high.

The voltage within the pump's intermediate circuit is too low, often due to fluctuations in the mains power supply.

The voltage within the pump's intermediate circuit is too high, likely caused by fluctuations in the mains power supply.

This error occurs during the initial setup of a Y-pipe installation. Both pumps will run at emergency operation speed.

Communication between the pump and the Building Management System (BMS) has been interrupted or has taken too long.

An incompatible combination of pumps has been detected in a dual pump (DP) or multi-pump (MP) system.

Communication between pump units in a dual (DP) or multi-pump (MP) system has failed or is defective.

In a dual pump system, if communication between the two pumps is lost, both displays will show the E052 error code. The pumps will operate independently in emergency mode.

This error indicates a problem with internal communication or interference from external signals (EMC). If additional control lines are connected, they might be causing interference that disrupts communication.

An error related to the EEPROM, which stores configuration data. This indicates an internal electronics issue.

This error points to a fault within the power section or frequency converter of the electronic module.

The electronic module number is not recognized or is incorrect, indicating an internal electronics issue.

The charging relay within the electronic module has failed.

The transformer inside the electronic module is faulty.

The 24-volt power supply for the differential pressure sensor is not working, or the sensor itself is faulty or incorrectly connected.

The motor type or number is not recognized as compatible by the electronic module.

Configuration data known as 'Infobyte' is missing or not set in the electronic module.

The data record for the FlexPump feature is not found within the electronic module's memory.

The data record for the FlexPump feature is present but contains invalid information.

This error indicates that different types of pumps have been interconnected, which is not allowed.

A short circuit has been detected in the motor's PTC (Positive Temperature Coefficient) sensor, which monitors motor temperature.

There is a break in the connection to the NTC (Negative Temperature Coefficient) sensor's power element, which is used for temperature monitoring.

A break in the connection to the NTC sensor within the electronic module has been detected.

After initiating the fault acknowledgement process, the display will ask if you want to acknowledge the error. Confirming 'Yes' attempts to reset the fault.

Unusual noises from the motor can indicate mechanical problems like worn bearings or issues with fluid flow such as cavitation.

The pump is failing to start or is shutting down unexpectedly, which can be caused by electrical issues or supply problems.

The pump is operating but not delivering its full capacity, which could be due to a partially closed valve or air trapped in the system.

The red LED is illuminated, and the motor is off. An error code is shown on the display, and the SSM (if activated) is triggered.

A solid red LED indicates a persistent fault condition that the pump has detected and requires manual acknowledgement to attempt a reset.