Sanyo Air Conditioner Error Code UU

The UU code on a Sanyo air conditioner indicates a DC overcurrent fault in the outdoor unit. The system has detected that current in the inverter drive circuit or compressor motor has exceeded safe limits. The unit shuts down automatically to prevent damage to the compressor and drive components. The outdoor main board is the first component to evaluate when this code appears.

No. The UU code represents an active protective shutdown triggered by an overcurrent condition. Continuing to operate the unit or bypassing the fault could result in permanent damage to the compressor or outdoor main board. Leave the unit off and have it inspected by a qualified technician before attempting to restart it.

Repair costs vary depending on the failed component. Outdoor main board replacement typically ranges from $200 to $500 including parts and labor. If the compressor has failed, costs can range from $600 to over $1,500 depending on the unit size and compressor availability. A technician inspection will be needed to determine which component is at fault before an accurate estimate can be given.

Diagnosing and repairing the UU error typically requires technical knowledge of inverter drive circuits and safe handling of high-voltage DC components. A knowledgeable technician should inspect the outdoor main board, compressor windings, and wiring. Replacing the outdoor main board is the recommended first step, but compressor testing requires specialized tools such as a megohmmeter.

A power reset may temporarily clear the UU code and allow the unit to restart, but if the underlying fault persists, the error will return, often quickly. Resetting without addressing the root cause risks further damage to the compressor or drive board. A proper diagnosis should be performed rather than relying on repeated resets.