User Manual

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ppendices
Frequently asked questions
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Siemens
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Building Technologies
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11.1.17 Can I create more than one user account in the mobile
app?
Yes, you can, but you cannot log into different accounts at the same time. Besides,
it is normally unnecessary to do so if you want to manage more than one
thermostat using the app, because one user account can associate with a
maximum of 12 thermostats. However, one thermostat can only be associated with
one user account. If your family members or colleagues want to manage the
thermostats, you can share the account info with them.
See Account creation and pairing [➙ 41] for more information about account
creation.
11.1.18 What should I do if I forget my account’s password?
You must reset the password following the on-screen instructions in the app.
11.1.19 How long are date and time valid, if power fails and the
thermostat has no connection to the cloud?
If the power fails and thermostat powers up within five minutes, date and time are
correct. Following power failure and thermostat restart after five or more minutes,
time is displayed only after synchronization is completed. The date is displayed as
normal.
The date and time will be synchronized automatically once power is resumed and
internet is connected.
11.1.20 How does Optimum start control work?
With Optimum start control, the thermostat determines when to preheat the room
as per room temperature and scheduled temperature setpoint.
Optimum start control can be influenced by entering Warm-up gradient to define
warm-up speed. For example, the factory setting of Warm-up gradient is 30 min/K.
When the room temperature is 1 °C lower than the setpoint, thermostat will start
pre-heating the room 30 minutes earlier.
See Managing application settings [➙ 28] for more information about Optimum
start control and Warm-up gradient.
11.1.21 How does Adaptive gain control work?
With adaptive gain control, the thermostat automatically adjusts the gain to a better
PID algorithm control value based on room temperature and temperature setpoint.
The gain cannot be manually changed.
11.1.22 How long are settings saved in the thermostat if power
fails?
User settings on the thermostat are not affected by power failure and remain until
users change the original settings.
11.1.23 How does self-heating compensation work?
Self-heating compensation includes two parts: self-heating compensation for relay
and device self-heating compensation. Compensation works from the time the
device is powered on.