1. Check whether the temperature sensor is missing or damage

2. High temperature protection of heating mode

3. Low temperature protection in refrigeration mode

The relay in protection mode is automatically disconnect.

Use of keys: the thermostat panel has three keys, keys + keys – SET keys

Key + : fast accumulation of values

Key -: to achieve the rapid decline of the value

Press Restart: Restart the button  en.wikipedia.org

SET: realize the setting temperature setting interface and parameter setting interface of the two-layer interface

SET short press digital tube (bottom) to SET the temperature quickly. Default – 20℃and 0℃, 20℃and 40℃, 60℃, 80℃, 100℃, and other data set convenient user quick call. For example: users need to SET 68.8℃, first short press SET to 60℃, and then through the buttons and fine-tune to the corresponding temperature. After setting, wait for 5s to automatically store data in memory. Compare with the first generation of thermostat, the second generation is more convenient and flexible to operate, and the dual LED display of the actual temperature and the set temperature is more convenient to observe.

Long press SET to enter the parameter setting interface. P0-p5 is the corresponding parameter setting item. Under the parameter setting menu, short press SET can be use to switch p0-p5. To modify a parameter, simply switch to the corresponding item and set it by adding or subtracting keys. Long press SET to save data after setting, or wait 6s to save data automatically.

P3 setting 1 means that the thermostat will stop running for 1 minute, and long press SET to trigger again.

P4 setting 1 means the thermostat will start working after 1 minute.

Long press SET to trigger again.

P5 is set as OFF by default.