LG Air Conditioner Error Code 228

Error code 228 on an LG air conditioner indicates a transmission error between HR unit 7 and the outdoor unit. It means the two components have lost communication over the dedicated transmission cable network. This error is specific to LG multi-zone heat recovery systems and requires inspection of both wiring connections and the HR unit PCB.

No, it is not advisable to continue operating the system with error code 228 active. The loss of communication between HR unit 7 and the outdoor unit means the system cannot properly coordinate refrigerant flow and zone control. Continued operation could result in improper refrigerant distribution, reduced efficiency, or potential damage to system components.

A system reset may temporarily clear the error display, but if the underlying wiring or PCB issue has not been resolved, the error code 228 will return once the system attempts to resume communication with HR unit 7. A reset is not a fix. The root cause must be identified and corrected before the system will operate reliably without returning this fault.

Some basic checks are accessible to knowledgeable DIYers, such as visually inspecting wiring terminals for looseness at the outdoor unit and HR unit 7. However, working inside the outdoor unit or HR unit involves high-voltage components and refrigerant systems, so most of the diagnosis and repair is best handled by a qualified HVAC technician. If the HR unit PCB has failed, replacement requires proper system shutdown and handling.

Repair costs vary depending on the root cause. If the fix involves reseating loose wiring connections, the cost would primarily be a service call fee, typically in the range of $75 to $200. If the transmission cable needs replacement, parts and labor could range from $150 to $400. A failed HR unit PCB is the most expensive scenario, with parts and labor potentially ranging from $400 to $900 or more depending on the specific unit and local labor rates.