Indication: LED display shows the following values: ""LLL"" - sensor not connected ""HHN"" - temperature out of range (less than -50 C or more than 120 C) ""---"" exceeding the limits set in parameter P6 Resetting parameters to factory settings To reset parameters to factory settings (default settings): 1) turn off the power; 2) press and hold the ""+"" and ""-"" buttons; 3) Apply power to the thermostat. The LED display will show 888 after which the current temperature will be displayed. Specifications: Overall dimensions:79X43X26mm (hole size74X39mm) Temperature measurement and programming range: -50 ... 120 Measurement accuracy: 0.1 in the range from -9.9 to 99.9 ;or 1.0 C outside this range Control accuracy: 0.1 0.1 in the range from -9.9 to 99.9 ;or 1.0 C outside this range Reading update time: 0.5 seconds Supply voltage V: 110-220 V AC Sensor: NTC 10K 0.5% cable length 0.8 m waterproof Maximum load current: 10A / 250VAC;20A / 12VDC Ambient temperature for the controller: +10 ... + 60 Ambient humidity: 20 - 85>#/p### Consumption current: 30 mA Current consumption during relay operation: 65 mA For indoor use. Load connection method: electromagnetic single-channel relay (10A / 220VAC) (for heavy loads use a contactor or solid-state relay of higher power). Package included: 1 xW3230 Mini Digital Temperature Controller 1 x Temperature Sensor The programmable thermostat model W3230 is designed to control temperatures in the range from -50 C to 120 C. It can be paired with a heater or cooler. The programmable thermostat is equipped with two three-digit LED displays an LED indicator for switching on the relay three.. Preparation for work:Connect a 110-220 VAC power supply to the VCC and GND pins. Connect the load control through the contacts ""S0"" and ""S1"" (connected to the open circuit of the controlled device power supply (serial connection)) After energizing the contacts ""VCC"" and ""GND"" the LED display will show the current temperature measured by the external temperature sensor. Setting and adjusting the set temperature To set the control temperature shortly press the ""SET"" button then use the ""+"" or ""-"" buttons to set the preset temperature and press the ""SET"" button again or do not press any buttons for 5 seconds. Programming To enter the programming mode hold down the ""SET"" button for 5 seconds then use the ""+"" or ""-"" buttons to select the menu parameter code (P0 ... P) from the ""Temperature regulator menu"" table. Further to adjust the parameter press the ""SET"" button and use the ""+"" or ""-"" buttons to change the parameter value. To save the settings press and hold the ""SET"" button or do not press any buttons for 5 seconds. Refresh rate: 0.5 S