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What to Do When the Siemens Connected Home System Doesn't Work?

If an error code appears on the display of the radiator head or the LED indicator of the switching unit blinks or lights up suspiciously, what does it mean and how to proceed can be found in the table below, or in the product's technical manual. In the case of the radiator head, do not leave the device in error mode for a long time, or remove the batteries to prevent them from discharging.

Radiator Head SSA911.01ZB

Notification

Device Status

LED indicator blinks red

Device software update in progress; temperature regulation is not possible.

LED indicator lights red

Commissioning error.

LED indicator blinks green

Waiting for user confirmation (used to start the task).

LED indicator lights green for 5 s

Task successfully completed.

ER1 - No valve detected

Correctly mount the actuator on the thermostatic valve.

Use the correct adapter.

ER2 - No closure point detected

ER3 - Valve movement not possible

Check if the valve pin is freely movable.

ERR - Actuator connection failed

The device is not in communication mode.

The device is out of range.

Switching Unit RCR110.2ZB

Notification

Device Status

LED indicator lights orange

Idle.

LED indicator blinks green quickly

Connecting to ZigBee network.

LED indicator lights green

Successful connection.

LED indicator blinks red slowly

ZigBee network error.

Relay outputs will be turned off.

Check if the ZigBee router is on, and try to shorten the distance between the device and the router.

Try reconnecting the device to the ZigBee network.

LED indicator lights red

Hardware failure.

LED indicator alternately lights red and green

Return to factory settings.

LED indicator blinks orange quickly

Firmware update in progress.

LED indicator blinks green slowly

Manual switch.

LED indicator blinks three times quickly (0.5 Hz), then returns to the previous state

Output state change.

It may happen that an error occurs in the Connected Home app that prevents pairing the app with the ZigBee router. In such a case, install an older version of the Connected Home app (download for Android here), connect to the ZigBee router, and after pairing, update the app to the latest version.

Siemens Connected Home components usually pair with the ZigBee router within a few seconds. If an error occurs during this process, it is necessary to restore the factory settings on the device and repeat the pairing.

Factory reset of radiator heads is done by pressing all three control buttons simultaneously and holding them for 10 seconds (a countdown will appear on the display). After the reset, the LED indicator blinks red to indicate an update is in progress. Before reconnecting, the head must be removed from the list of devices in the app.

Resetting the switching unit is done similarly: press the control button and hold it for about 10 seconds until the LED indicator starts blinking alternately green and orange to indicate that the factory settings have been restored. Once you release the button, the LED indicator lights orange and the switching unit is ready to be paired with the router again. The switching unit does not need to be removed from the list of devices in the app; this change occurs automatically during the reset.

Siemens radiator heads are equipped with a child lock that locks the head to prevent changes in temperature or settings. Activating the child lock blocks manual control of the heads, but control via the mobile app will still be available. You can turn on the lock by pressing the plus (+) and minus (-) buttons simultaneously and holding them for 3 seconds, and turn it off in the same way.

The Siemens Connected Home smart heating system is designed for controlling heating via the internet, so it does not have a touch display and must be connected to a smartphone or tablet. For local control, it is sufficient to purchase any tablet, which will fully replace the control touch unit, and simply install the Siemens Connected Home app on it.

Yes, of course. It is true that one ZigBee router can control up to 32 radiator heads. To control a larger number, you must add another router to the system, thereby increasing the maximum number of heads by another 32.

The range of the ZigBee signal is up to 60 m indoors under ideal conditions, but in practice, this distance can be significantly shorter depending on "obstacles" (walls - the most signal-problematic building materials are reinforced concrete and slate, signal interference, etc.). You can easily increase the signal range and strength by adding a signal repeater: ZigBee router or switching unit. We recommend choosing another router as a repeater where the signal needs to be extended to other floors or in environments with impermeable walls. In other cases, another switching unit is sufficient for greater ZigBee signal range. For larger applications, signal amplification is described in the question "The signal range is not enough for me, what are my options?".

If you are installing Siemens Connected Home smart heating in larger applications, the number of heads and the range of the ZigBee signal will probably not be sufficient. In such a case, it is important for the proper functioning of the smart heating to connect signal amplifiers to the central ZigBee router, as shown in the connection diagram below. To pair with Siemens Connected Home components located on other floors or behind a signal-impermeable wall, we recommend choosing another ZigBee router as a signal repeater. Up to 4 heads can be connected to each repeater, and repeaters can be connected up to 3 in a row.

Smart heating for commercial buildings

Most likely, the connection between the heads and the ZigBee router is not strong enough, i.e., the ZigBee signal is too weak, or the heads keep disconnecting and reconnecting due to the signal. To strengthen the signal, add a repeater: ZigBee router or switching unit. Rapid battery drain also occurs when the head is in error mode (an error code appears on the display), in which case remove the error, or remove the batteries.