Samsung Heat Pump Error Code U202

U202 indicates a communication error between the outdoor unit's main and sub MICOM control boards, or between multiple outdoor units in a linked configuration. The MICOM boards are the processors that control and coordinate outdoor unit operation. When they lose communication, the system shuts down to prevent unsafe operation. The fault is typically caused by wiring damage, low-voltage power supply issues, or a failed control board.

No. A U202 error means the outdoor unit's control boards cannot communicate, and the system will not operate normally in this state. Attempting to force operation could risk damage to the compressor or other components. The system should remain off until the communication fault is identified and corrected.

Clearing the error with a reset may temporarily restore operation if the fault was caused by a brief signal interruption, but it will not fix an underlying hardware problem. If the U202 code returns after the reset, the system requires hands-on diagnosis of the power supply voltages and communication wiring before it will operate reliably. Repeated resets without addressing the root cause are not a long-term solution.

Yes, the first step is performing an error reset using Key 3 on the unit. If the error returns after the reset, there is an underlying fault that needs to be diagnosed and repaired before the system will operate normally. A reset alone will not fix wiring damage or a failed board.

Repair costs vary depending on the root cause. If the issue is a damaged communication cable or a loose connection, repair costs are typically lower, generally in the range of $75 to $200 for a service call and minor wiring repair. If a MICOM control board needs to be replaced, costs can range from $250 to $600 or more depending on the specific board and labor rates in your area.