Warning messages

Warning displayed:

The status display is marked in yellow.
Warning message, warning code (W...), cause and remedy are described as text.

Display of a warning in 7-segment LED display:

The warning is displayed with a red coloured warning code (H…).

Warnings indicate restricted pump function. The pump continues to operate in restricted mode (emergency operation).
Depending on the cause of the warning, emergency operation leads to a restriction of the control function and even reactivation of a fixed speed.
If the pump identifies as part of permanent monitoring that the cause of the warning no longer applies, the warning is revoked and operation resumes.

If there is a warning message, the display is permanently on and the green LED indicator is off.

Behaviour and display in the event of a warning message.

Case 1: Display is in standby mode (display switches off after 2 mins if there is no operation).

If an event occurs during this time that results in a warning message, the display switches on. An orange warning triangle is displayed in the top left-hand corner of the home screen.
If the warning is not cancelled or resolved, the view switches from the home screen to the warning message screen after 20 minutes.

Case 2: Display is switched on, settings are configured. In the meantime, a warning occurs (e.g. warning due to a configuration error).

The display remains on and the green LED indicator goes out. If the warning is not cancelled or resolved, the view switches from the home screen to the warning message screen after 20 minutes.

NOTICE

If the back button is pressed for longer than 2 seconds or the control knob is pressed (within the 20 minutes), the warning message is shown in large on the display.

Warning messages
Code	Fault	Cause	Remedy
550	There is flow through the pump in the opposite direction of flow.	External influences cause flow through against direction of flow of the pump.	Check power control of the pumps, install swing check valve if needed.
550	Additional information about causes and remedy: If flow passing through pump in the opposite direction is too strong, the motor can no longer start.
551	Undervoltage	Power supply has dropped below 195 V.	Check power supply.
551	Additional information about causes and remedy: The pump is running. Undervoltage reduces the pump output. If the voltage falls below 160 V, the reduced operation cannot be maintained.
552	There is externally generated flow through the pump in the direction of flow.	External influences cause flow through in the pump’s direction of flow.	Check power control of the other pumps.
552	Additional information about causes and remedy: The pump can start despite flow through.
553	Electronic module is defective.	Electronic module is defective.	Replace electronic module.
553	Additional information about causes and remedy The pump is running, but cannot provide full power under the circumstances. Contact service.
554	MFA¹⁾ pump is not reachable.	An MFA¹⁾ partner pump no longer reacts to requests.	Check Wilo Net connection or power supply of the partner pump.
554	Additional information about causes and remedy In the MFA¹⁾ overview, check the pump highlighted with (!). The supply is ensured, a substitute value is assumed.
555	No plausible sensor value at analogue input AI 1.	The configuration and the present signal lead to an unusable sensor value.	Check configuration of the input and connected sensor.
555	Additional information about causes and remedy Incorrect sensor values may lead to substitute operation modes that ensure functioning of the pump without the required sensor value.
556	Cable break at analogue input AI 1.	The configuration and the present signal help identify the cable break.	Check configuration of the input and connected sensor.
556	Additional information about causes and remedy: Cable break detection may lead to substitute operation modes that ensure functioning of the pump without the required external value.
557	No plausible sensor value at analogue input AI 2.	The configuration and the present signal lead to an unusable sensor value.	Check configuration of the input and connected sensor.
557	Additional information about causes and remedy Incorrect sensor values may lead to substitute operation modes that ensure functioning of the pump without the required sensor value.
558	Cable break at analogue input AI 2.	The configuration and the present signal help identify the cable break.	Check configuration of the input and connected sensor.
558	Additional information about causes and remedy: Cable break detection may lead to substitute operation modes that ensure functioning of the pump without the required external value.
559	Electronic module too hot.	Permissible temperature of the electronic module is exceeded.	Ensure permissible ambient temperature. Improve room ventilation.
559	Additional information about causes and remedy: Limited operation of the pump to avoid damage to the electronic components.
560	Incomplete software update.	The software update was not completed.	Software update with new software bundle is recommended.
560	Additional information about causes and remedy: Software update was not carried out; pump continues to operate with previous software version.
561	Analogue input overloaded (binary).	Voltage analogue input short-circuited or too heavily loaded.	Check the cables and consumers connected to the analogue input power supply for short circuits.
561	Additional information about causes and remedy: Binary inputs are impaired. Functions of binary inputs are not available.
562	Analogue input overloaded (analogue).	Voltage analogue input short-circuited or too heavily loaded.	Check the cables and consumers connected to the analogue input power supply for short circuits.
562	Additional information about causes and remedy: Analogue input functions impaired.
563	Sensor value missing from BMS.	Sensor source or BMS is configured incorrectly. Communication has failed.	Check configuration and function of BMS.
563	Additional information about causes and remedy: Control functions impaired. A replacement function is active.
564	Setpoint missing from BMS.	Sensor source or BMS is configured incorrectly. Communication has failed.	Check configuration and function of BMS.
564	Additional information about causes and remedy: Control functions impaired. A replacement function is active.
565	Signal too strong to analogue input AI 1.	The available signal is significantly over the expected maximum.	Check input signal.
565	Additional information about causes and remedy: The signal is processed with the maximum value.
566	Signal too strong to analogue input AI 2.	The available signal is significantly over the expected maximum.	Check input signal.
566	Additional information about causes and remedy: The signal is processed with the maximum value.
569	Configuration missing.	Pump configuration is missing.	Configure pump. Software update is recommended.
569	Additional information about causes and remedy: Pump operating in substitute operation mode.
570	Electronic module too hot.	Permissible temperature of the electronic module is exceeded.	Ensure permissible ambient temperature. Improve room ventilation.
570	Additional information about causes and remedies: The electronic module must adjust the pump’s operation in the event of noticeable overheating to prevent damage to electronic components.
571	Twin-head pump connection interrupted.	The connection to the dual-pump partner cannot be established.	Check power supply of the dual-pump partner, cable connection and configuration.
571	Additional information about causes and remedy: Pump function slightly impaired. The motor head meets the pump function up to the performance limit.
572	Dry run detected.	The pump has detected power consumption that is too low.	Check water pressure, valves and swing check valves.
572	Additional information about causes and remedy: The pump is not conveying any fluid or only very little fluid.
573	Communication to the display operating unit interrupted.	Internal communication to display and operating unit interrupted.	Check/clean contacts in the terminal room as well as on the display and operating unit.
573	Additional information about causes and remedy: The display and operating unit is connected to the pump via 4 contacts on the edge of the opened terminal room.
574	Communication to CIF module interrupted.	Internal communication to the CIF module interrupted.	Check/clean contacts between CIF module and electronic module.
574	Additional information about causes and remedy: The CIF module is connected to the pump in the terminal room via four contacts.
575	Remote control is not possible by radio.	The Bluetooth radio module is faulty.	Software update is recommended. Contact Service.
575	Additional information about causes and remedy: Pump function not impaired. If a software update does not eliminate the issue, contact Service.
576	Communication with Wilo sensor interrupted.	Internal communication with Wilo sensor interrupted.	Check the sensor cable and the Wilo-Connector sensor connector. The warning can only be reset if the pump is disconnected from the power supply and re-connected.
576	Additional information about causes and remedy: The pump function is slightly impaired. The pump can no longer determine the internal fluid temperature.
577	Software update cancelled.	The software update was not completed.	Software update with new software bundle is recommended.
577	Additional information about causes and remedy: Software update was not carried out; pump continues to operate with previous software version.
578	Display and operating unit defective.	A fault in the display and operating unit has been identified.	Replace display and operating unit.
578	Additional information about causes and remedy: The display and operating unit is available as a spare part.
579	Software for display and operating unit incompatible.	Display and operating unit cannot communicate correctly with the pump.	Software update is recommended.
579	Additional information about causes and remedy: Pump function not impaired. If a software update does not eliminate the issue, contact Service.
580	Too many wrong PIN entries.	Too many connection attempts with wrong PIN.	Disconnect power supply from the pump and switch it on again.
580	Additional information about causes and remedy: An incorrect PIN has been entered more than 5 times. For safety reasons, further connection attempts are prevented without a restart.
581	Fluid temperature unknown.	Temperature sensor is defective.	Replace temperature sensor.
581	Additional information about causes and remedy: The pump works in a substitute operation mode that maintains pump operation.
582	Twin-head pump is not compatible.	Dual-pump partner is not compatible with this pump.	Select/install appropriate dual-pump partner.
582	Additional information about causes and remedy: Dual-pump function is only possible with two compatible pumps of the same type.
583	Fluid temperature too high.	The fluid temperature is hotter than 110 °C.	Reduce fluid temperature.
583	Additional information about causes and remedy: High fluid temperatures lead to significant damage to the pump.
584	Internal fault in display and operating unit. Automatic reactivation of the display follows.		Contact service. Replace display and operating unit.
584	Additional information about causes and remedies: The basic pump functions are not impacted by this fault.
590	MFA¹⁾ partner type is not appropriate.	An MFA¹⁾ partner does not have the appropriate type.	Check type and software of the partner pump.
590	Additional information about causes and remedy: A maximum replacement flow is provided for the Multi-Flow Adaptation partner. Check the partners highlighted with (!) in the MFA ¹⁾ overview of the context menu.

¹⁾ MFA= Multi-Flow Adaptation