- Inappropriate valve on the
radiator
ERROR #3
- The valve got stuck
- Inappropriate valve on the
radiator
- Too little stroke (movement) of
the valve
- Inspect the valve operation
- Replace the valve on the radiator
- Check the valve stroke
ERROR #4
- No range
- No batteries
- Check the distance between the
actuator and the controller
- Insert batteries into the actuator
After the communication is re-
established, the alarm is deactivated
automatically.
STT-869 actuator alarm
ERROR #1 - Calibration error 1
–
Moving the screw to the mounting
position took too much time
- The limit switch sensor is damaged
- Calibrate actuator again by holding the
communication button until the third
flash of green light
- Call the service staff
ERROR #2 - Calibration error 2
–
The
screw is maximally pulled out. No
resistance while pulling out
- The actuator has not been
screwed to the valve or has not
been screwed completely
- The valve stroke is too big or the
valve dimensions are not typical
- Actuator current sensor is
damaged
- Check if the controller has been
installed properly
- Replace the batteries
- Calibrate actuator again by holding the
communication button until the third
flash of green light
- Call the service staff
ERROR #3 - Calibration error 3 - The
screw has not been pulled out enough
- the screw meets resistance too early
- The valve stroke is too small or the
valve dimensions are not typical
- Actuator current sensor is
damaged - Low battery level
- Replace the batteries
- Contact the service staff
ERROR #4 - No feedback
- The master controller is switched
off
- Poor range or no range to connect
with the master controller
- Radio module in the actuator is
damaged
- Check if the master controller is on
- Reduce the distance from the master
controller
- Call the service staff
ERROR #5 - Low battery level
The battery is flat
Replace the batteries
ERROR #6 - Encoder is locked
The encoder is damaged
- Calibrate actuator again by holding the
communication button until the third
flash of green light
- Call the service staff
ERROR #7 - To high voltage
- Unevenness of the screw, the
thread etc. may cause excessive
resistance
- Too high resistance of gear or
motor
- Current sensor is damaged
ERROR #8 - Limit switch sensor error
Limit switch sensor damaged
