Technical data

11.2 Thermostat T-55 alarms/problems
An alarm is sent when more than 3 hours have elapsed since the controller received the last radio signal from the thermostat.
The table below lists problems that can occur in Thermostat T-55.
Indication Causes Solutions
LED fl ashes twice Thermostat battery power is running low Replace batteries
11.3 Thermostat T-54 Public alarms/problems
An alarm is sent when more than 3 hours have elapsed since the controller received the last radio signal from the thermostat.
The table below shows problems that can occur in Thermostat T-54 Public.
Indication Causes Solutions
Power LED and channel LED fl ashes Cover of thermostat is opened Check thermostat settings and replace
thermostat cover
LED fl ashes twice Thermostat battery power is running low Replace the batteries
11.4 Controller C-55/56 alarms/problems
An alarm is sent when more than 3 hours have elapsed since the controller received the last radio signal from the thermostat.
The table below shows problems that can occur in the Controller C-55/56.
Indication Causes Solutions
Power LED and channel LEDs in the
Controller C-55/56 fl ash
Antenna out of position or wire
disconnected
Install antenna in correct position with wire
correctly connected
Alarm in Interface I-75/76
Battery icon
displayed in room
information on Interface I-75/76
Batteries in thermostat are discharged Replace batteries
When error is resolved, thermostat screen
displays room temperature and battery icon
is replaced with
Radio alarm in Interface I-75/76
Radio icon
in room information on
Interface I-75/76
Power LED and thermostat LED's in
the Controller C-55/56 for connected
channels fl ash
Thermostat is out of correct position Reduce distance between thermostat and
Controller C-55/56 or change location of
thermostat in the room
11.5 Contact installer
For installer contact information, see the installation report in the fold-out of this document. Prepare the following information before
contacting an installer:
• Installation report
• Drawings of the underfl oor heating system (if available)
• List of all alarms, including time and date
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UPONOR CONTROL SYSTEM – INSTALLATION AND OPERATION MANUAL
UK English