① Is the switch on? check the power
② Check the power of the control controller attached inside the electric panel of each area
③ Check if the automatic manual switch attached to the electric panel is set to automatic

① For the solar sensor, clean the sensing area with a soft cloth about once every 3 months.
② When EC and pH sensor values are high or low
Control the suction amount of the flowmeter using the nutrient solution manual valve
Adjust the zero values and span values of EC1 and PH sensors on the controller 8 screen.
③ In case of failure of EC or pH sensor
Check the capacity of the nutrient solution pump and the quantity required for the irrigation area
Change the EC and PH calibration ranges to 0.1 on the controller 8 screen, respectively, and then input EC, PH upper and lower limits open.
Check the supplied nutrient solution with a portable EC, PH measuring instrument and then adjust the opening range

① Check the power switch, check whether the supply pump is automatic or manual
② Check the magnet contactor overload status on the electric panel

① Check the automatic and manual mode of the nutrient solution solvent valve
② Check the amount of nutrient solution in the nutrient solution tank
③ Clean the nutrient solution tank valve and filter
④ Check the irrigation zone and nutrient solution solvent valve output on screen 9 of the controller
⑤ Check the cleaning of the main filter

① Check the alarm contents of the controller screen 11
② Check the operation status of the electric panel alarm buzzer
③ Confirm input of dripper capacity, flow meter pulse, and end time on controller 2 screen
④ Check the EC, PH alarm deviation, alarm delay time, calibration range, low moisture content, high moisture content, low temperature alarm, high temperature alarm, flow rate signal cycle setting value of controller 8 screen

① In the event of a power outage, identify the location of various operating devices in the greenhouse and devise a method according to opening and closing.
Check the main power supply
Check the fuse on the electric panel
Check the automatic and manual selection switches of various operating devices
② When lightning strikes, check the various open/close states and then keep the power OFF.
③ After confirming that the lightning strike has ended, keep the power ON and check the various operating devices again.
④ When an alarm occurs, check the type of alarm and take action according to the relevant items.
⑤ Alarm type
When communication with the controller is lost
When the room temperature is below the low temperature alarm value
When the indoor temperature exceeds the high temperature alarm value
⑥ When the controller does not operate and the contents of the alarm are unknown, switch various devices to manual mode on the electric panel, manage them manually, and contact the A/S person in charge