Button lock
Press operating mode button 
for 3 seconds to lock or unlock the buttons if
manual button lock is configured (parameter P14 = 2).
The thermostat automatically locks the buttons 30 seconds after the last adjustment if "Auto lock" is configured (P14 = 1).
The key symbol 
indicates locked buttons.
Reminder to clean filters
FIL | This message reminds you to clean the filter on your HVAC equipment. | ||||
| It will appear after __________ "fan operating hours" and disappear when | ||||
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| This reminder must be configured by your HVAC installer. | ||||
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External faults
This alarm message tells you an external alarm has occurred:
AL1 | AL1 : ______________________ |
AL2 | AL2 : ______________________ |
The alarms are configured by your HVAC installer
Commissioning (by qualified HVAC installer)
To adapt the thermostat to your system and optimize the control performance, a number of control parameters can be adjusted. This can also be made during operation without opening the thermostat.
Control sequence
The thermostat can be used in systems either for heating only or cooling only, manually selection of heating or cooling, or automatic heating / cooling changeover. Depending on the selected application, the relevant modes are available and can be adjusted by commissioning parameter P01 if needed.
The factory setting for
Recalibrating the sensor
If the room temperature displayed by the thermostat does not agree with the temperature effectively measured (after min 1 hour of operation), the tem- perature sensor can be recalibrated. With parameter P05 the temperature can be adjusted by + or – 0.5 °C up to a maximum of + / - 3 °C.
Note: Economy mode
The Economy setpoints are
Important: You can set these setpoints to OFF; the thermostat then is inactive, i.e. no protective heating or cooling function. Risk of frost!
Control parameters
Proceed as follows to change the most important control parameters: (Your HVAC installer can set additional parameters)
1. Set the thermostat to Protection 
+/ - 2. Press - and + simultaneously for a minimum of 4 seconds.
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+ / - | 3. | Repeatedly press the + or – button to select the required parameter. |
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| + | - + |
| - | + | - | + | - + | - |
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| P02 | P14 | |||||||||
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| P01 |
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| P12 | P13 |
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+ / - | 4. | Press + and – simultaneously, the current value of the selected parameter starts to flash, allowing you to change | ||||||||||
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+ / - | 5. | The next parameter is displayed when you press + and – again simultaneously. |
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6.Repeat steps 3 to 5 to display and change additional parameters.
7.15 seconds after the last display or setting, all changes are saved and the thermostat will leave parameter entry mode.
Para- | Description |
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P01 | Control sequence |
| 0 | = Heating only |
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| 1 | (Cooling only) | 1 | = Cooling only |
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| 2 | = Manual H or C |
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| 3 | = Auto Changeover |
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| 4 | = Heating & cooling |
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| 4 | (Heating & Cooling) |
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P02 | Mode selection by user via operating mode button |
| 1 | (Protection, | 1 | = Protection, Comfort, |
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| Comfort) | 2 | = Protection, Comfort, |
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P04 | Selection of °C or °F |
| 0 | (°C) | 0 | = °C |
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| 1 | = °F |
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P05 | Sensor calibration |
| 0.0 K | – 3 ... +3 K |
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P06 | Standard temperature display |
| 0 | (Room temp.) | 0 | = Room temperature |
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| 1 | = Setpoint |
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P07 | Additional user information |
| 0 | (no display) | 0 | = no display |
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| 1 | = Temp in °C / °F |
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P08 | Comfort basic setpoint |
| 21 °C | 5 | ... 40 °C |
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P09 | Minimum setpoint limitation in Comfort | (WminComf) | 5 | °C | 5 | ... 40 °C |
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P10 | Maximum setpoint limitation in Comfort | (WmaxComf) | 35 °C | 5 | ... 40 °C |
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P11 | Setpoint of heating in Economy mode | (WheatEco) | 15 °C | OFF, 5 °C…WcoolEco |
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P12 | Setpoint of cooling in Economy mode | (WcoolEco) | 30 °C | OFF, WheatEco…40°C |
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P13 | Electric heater in cooling mode |
| ON | OFF = Disabled |
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P14 | Button lock |
| 0 | (Disabled) | 0 | = Disabled |
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| 1 | = Auto lock |
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| unlock the buttons) |
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| 2 | = Manual lock |
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The control parameters displayed depend on the DIP switch settings made
Please record all changes you make!
(All temperature settings can be made in increments of 0.5 K)
CE1B3176.3en / | Subject to change | Siemens Building Technologies |
