TECH ST-2640, User Manual, Page: 15 / 20

EU-2640 user’s manual
15
VIII. Protections and alarms
In order to ensure the maximum safe and trouble-free operation, the regulator is equipped with
a number of protections. An acoustic signal is activated in the case of an alarm and a relevant
message is shown on the display.
Automatic sensor control
If the temperature sensor or the external sensor are damaged, an alarm is activated, signaling
the relevant defect on the display, e.g. "
Sensor damaged ".
The alarm will be active until the defect is removed (battery exchanged in the sensor or sensor
replaced with a new one) and until it is deleted from the strip level.
Deleting the zone alarm from the strip level:
The user marks the zone where the alarm is present (exclamation mark instead of the strip
number). The user presses the EXIT button – the screen will show two options to select from:
 Reset
For a given period of time, the strip will try to communicate with the sensor again (this
may take several minutes). Until communicating with the sensor, the valve remains in
alarm position (closed – zone reheated). If the communication attempt with the zone is
not successful, the alarm occurs again.
 Switch off
This function deactivates the zone from operation. Reactivation is possible via the option
of Activate – parameter: Main menu / Sensors / Zone 1..8.
Fuse
The regulator is equipped with tube fuse element WT 3.15A, dimensions 5x20mm, protecting the
network.
NOTE:
Higher amperage fuse should not be used as it may damage the controller.