Grundfos ALPHA3 Pump

The warning and alarm symbol flashes red, the display shows error code E3, and the pump stops. This means the electrical supply voltage to the pump is too high.

The warning and alarm symbol flashes yellow, and the pump continues to run. This means the pump is receiving a signal via the PWM input, but the PWM configuration is either missing or incomplete.

This fault is not shown on the pump's operating panel but is logged and can only be seen in the Grundfos GO app. It indicates that there is air present in the pump and/or the system.

The warning and alarm symbol flashes red, the display shows error code E2, and the pump stops. This means the electrical supply voltage to the pump is too low.

The electrical supply voltage to the pump is below the specified operating range. This alarm prevents the pump from functioning correctly or starting.

The pump is detecting water flow through it even when it is switched off and stopped. This indicates that other pumps or system sources are causing unwanted circulation through the unit.

The warning and alarm symbol flashes red, the display shows error code E1, and the pump stops. This indicates that the pump's motor is blocked.

The warning and alarm symbol flashes red, the display shows error code E4, and the pump stops. This indicates that water is missing in the system or the system pressure is too low, causing the pump to run dry.

The warning and alarm symbol flashes red, the display shows error code E3, and the pump stops. This indicates an unspecific internal fault within the pump.

The pump has detected a critical internal fault, indicated by alarm codes 72, 76, or 85. This issue prevents the pump from operating correctly and requires attention.

The electrical supply voltage to the pump is exceeding the specified operating range. This alarm indicates a potential risk of damage to the pump's electronic components.

The warning and alarm symbol flashes red, the display shows error code E3, and the pump stops. This indicates an unspecific internal fault within the pump.

The pump has detected a minor internal fault, indicated by warning code 84. Normal pump operation might not be immediately affected, but it signals a potential developing issue that should be monitored.

The warning and alarm symbol flashes red, the display shows error code E3, and the pump stops. This indicates an unspecific internal fault within the pump.

The warning and alarm symbol flashes red, the display shows error code E3, and the pump stops. This means the pump's internal configuration file is corrupted or missing.

The pump's internal real-time clock is not functioning correctly. While this does not affect immediate pump operation, it will impact any scheduled operations that rely on the clock.

The pump is not receiving power and is consequently not operating because a fuse in the electrical installation has blown.

The Grundfos GO Balance app disconnects from the ALPHA3 pump. This often occurs when the Bluetooth signal becomes too weak, especially when moving the smart device across different rooms during use.

Error Code 25 indicates that the Pulse Width Modulation (PWM) signal setup, used to control the pump's speed and flow rate, is incorrectly configured. This often occurs during initial installation or when replacing an existing pump.

This fault indicates that the internal rotor of the pump is blocked and unable to turn. This prevents the pump from circulating liquid in your system.

The pump is detecting that the electrical voltage being supplied to it is too low. This can prevent the pump from starting or operating correctly.

This indicates an internal electrical problem within the pump's motor or its control system. It signifies a hardware failure or malfunction.

The pump is operating without sufficient liquid, meaning it is trying to pump air instead of water. Running dry can cause significant damage to the pump over time.

The Grundfos GO Remote app cannot complete a firmware update. This can happen if your smart device does not meet the necessary conditions for the update process, such as having low battery or being out of range.

The housing of the Grundfos ALPHA3 pump becomes very hot to the touch. This condition is usually caused by the liquid being Pumpd, which may be scalding hot.

If your heating system is not providing adequate heat, one possible cause is the 'Night Setback' function being active. This feature automatically reduces pump activity during certain periods to save energy.

The pump system is producing audible noise during operation. This can be caused by excessive flow or air trapped within the system.

The Grundfos ALPHA3 pump or its components show signs of physical damage. Operating a damaged product can be unsafe and may lead to serious injury, including electric shock.

The pump is not operating, and other common causes like power supply issues (blown fuse, tripped breaker) have been ruled out, indicating an internal defect.

The pump itself is making noise, such as rattling or gurgling, due to trapped air pockets inside its casing or impeller.

The pump is generating noise, often a grinding or cavitation sound, because the water pressure at its inlet is below the recommended minimum level.

The pump's PWM feedback signal, which provides real-time operating status, indicates a 90% duty cycle. This specific feedback usually triggers a warning, suggesting that the pump's rotor might be blocked or obstructed.

When the warning and alarm symbol on the operating panel turns red, the pump has encountered a critical alarm and stops operating completely. All mode, speed, and unit LEDs are switched off. Immediate action is required to resolve the issue.

The red LED on the pump's operating panel is flashing. This signals that a critical alarm has been detected, indicating a fault that prevents the pump from operating properly.

Audible noise, such as gurgling or bubbling, is present in the heating system pipes, indicating the presence of air pockets.

Audible noise in the system pipes is caused by excessive water flow, which can lead to turbulence, cavitation, or pipe vibrations.

The pump is not receiving power and is not operating because its associated current-operated or voltage-operated circuit breaker has tripped, interrupting the electrical supply.

When the warning and alarm symbol on the operating panel turns yellow, the pump is in a warning state. It continues to run, but its performance may not be optimal, potentially leading to issues like insufficient heating. An error code will alternate on the display.

The yellow LED on the pump's operating panel is continuously lit. This signals that a warning has been detected, indicating an issue that may affect performance but typically doesn't stop pump operation immediately.