TC3XX thermostat memory during power off

NOTICE

COMPLEX PROCEDURE REQUIRED.
The resolution of this article has many complex steps that may result in unforeseen results if not performed correctly. If you are at all unfamiliar with the requirements, please contact Product Support Services for assistance.

Issue

Is there a way to get the thermostat into operational mode automatically after power loss?

Product Line

Field Devices, Other

Environment

TC300

TC303

TC353

Cause

The thermostats does not start up after power loss.

Resolution

Once power is restored, the thermostat will remember all parameters (set point, program, etc.) that were in place before the power failure.
The default setting is to restore the thermostat in an off state. This is how the thermostat is delivered from the factory.

The following specification numbers allow the thermostat’s restored state to be configured: -
TC303-3A2L
TC303-3A4L
TC303-3A2LM
TC303-3A4LM
TC353-3A2L
TC353-3A4L
TC303-3A2DLS
TC303-3A4DLS
TC303-3A2DLMS
TC303-3A4DLMS
TC353-3A2DLS
TC353-3A4DLS

An internal system setting (parameter 03) allows the possibility to alter the behaviour of the thermostat upon power restoration.
00 = Restores with previous status  
01 = Restores with power off.  (this is the factory default setting)
02 = Restores with power on.

Please note: internal system parameters MUST ONLY be changed by a trained Schneider Electric or an approved Partner technician.
Incorrect setting of such internal system parameters may result in either undesired operation of the thermostat or irreversible damage.

For guidance and instruction on how to perform the adjustment of internal system parameters, please contact a member of the Product Support Services team.