It is generally recommended to have electrical appliances, including air conditioners, properly grounded for safety reasons. Grounding helps protect against electrical faults, such as short circuits or electrical surges, by providing a path for the excess electrical current to dissipate harmlessly into the ground.
If an air conditioner is not properly grounded or lacks a ground wire, there is an increased risk of electrical hazards. In the event of a fault, such as a short circuit or a malfunction, the excess electricity may not be able to disperse safely. This can lead to the risk of electric shock to anyone who comes into contact with the AC unit or other conducting surfaces.
It is important to consult with a qualified electrician to ensure that your air conditioner is correctly installed and grounded according to local electrical codes and safety standards. They can assess your specific electrical setup and provide the appropriate guidance to ensure your safety.