Product Name: Ventilation Exhaust Fan Temperature Variable Voltage and Variable Frequency (VVVF) Material: Plastic Customized: Non-Customized Condition: New Certification: CCC, ISO: 9001 Signal: Continuous Mathematical Model: Non-Linear Structure: Closed-Loop Task: Temperature Vvvf Trademark: Yuyun Sanhe Transport Package: Standard Export Packages Specification: International Standard Origin: China(Mainland) Product Description Ventilation Exhaust Fan Tem. VVVF 1. ON/OFF: Turn on the exhaust fan/Turn off the exhaust fan2. Manual mode: Hand adjustment in the gear range of 1-6.3. Auto mode: According to the given temperature& actual temperature to achieve the wind speed auto-adjustment. If the given temperature is bigger than the actual one, increase 1 gear by each +0.5° For example: The given temperature is 25°,actual temperature is lower than 25°,gear is in the digital number 1 when the actual temperature add 0.5, gear goes to 2, and so on.4. Setup: Set temperature, range from 10-49°,the default is 25°, with the automatic memory on the setting datas.5.+,- :plus or minus temperature when setup the temperature.6.Up,Down: plus or minus wind speed under Manual mode.Input VoltageOutput VoltageOutput Rated PowerOver Current ProtectionOver Temperature ProtectionAC380/440V,50/60HZAC380/440V, 1-50HZ/60HZ1.5KWCheck if the motor wire gets short-circuit or stuck.Check whether the fan gets stuck or air intake blocked up about Our Company