Please check:
1. Whether the temperature switch is adjusted too high or damaged;
2. Whether the switch is damaged;
3. Whether the antifreeze switch is damaged;
4. Whether the pressure switch is tripped or damaged;
5. Whether the compressor overload protector is damaged or tripped;
6. Whether the electromagnetic relay coil is damaged and the overload protector is damaged;
7. Whether the liquid level in the water tank is too low;
8. Please check if the chilled water flow switch is damaged;
Note: If the above control switch or line is faulty, the compressor will not operate.