S/N | Fault | Causes | Solutions |
1 | Power supply open phase/undervoltage | Main power shows open phase or undervoltage. | Check main power supply of the equipment. |
2 | Phase sequence protection | Wrong connection of equipment power lines | Exchange phase sequence of any two live wires. |
3 | R404 compressor super-high pressure protection | 1. Condenser fins of air cooling equipment are blocked. 2. Ambient temperature of air cooling equipment is excessively high. 3. Cooling water for water cooling equipment is insufficient. 4.Shell-and-tube condenser of water cooling equipment is blocked. | 1. Purge condenser fins with compressed air. 2. Ensure proper ventilation around the equipment to reduce ambient temperature. 3. Check whether Y-type filter is blocked and whether cooling tower is started; clean the tower. 4.Notify equipment manufacturer to clean the shell-and-tube condenser. |
4 | R23 compressor super-high pressure protection | 1. R404 refrigerating system lacks refrigerant. 2. R404 expansion valve fails. | 1. Notify equipment supplier to check for leakage and charge refrigerant. 2. Notify equipment supplier to check the refrigerating system. |
5 | Motor overload protection | Motor is damaged. | Notify equipment supplier to replace the motor. |
6 | Chamber over-temperature protection | Temperature setting of the independent over-temperature controller is low. | Check and reset the protection temperature. |
7 | Humidifying pipe no-water protection | 1. Humidifier solenoid valve or water pump fails, causing water shortage. 2. Humidifying pipeline is blocked. 3. Electronic float fails, causing water shortage of upper water box. | 1. Replace the water pump or water line solenoid valve. 2. Clean the silicone hose for humidification. 3. Clean the electronic float and if the fault persists, replace the float. |
8 | Cooling water shortage protection | Cooling tower is not started. | Start the circulating cooling water tower. |
9 | Humidifying water shortage protection | Humidifying water bucket lacks water. | Manually fill the bucket with water. |
10 | Low cooling rate | 1. Refrigerating system shows refrigerant leakage. 2. Excessively high or low ambient temperature 3. Motor failure | 1. Notify equipment supplier to check for leakage and charge refrigerant. 2. Ensure proper ambient temperature where the equipment is installed. 3. Notify equipment supplier to replace the motor. |
11 | Low heating rate | The heating system fails. | Replace faulty heater. |
