Ten Thousand Yuan in Sixteen Minutes

An overload should have driven it high. He traced the wire bundle downward and found moisture at the bottom. A failing drain heater had allowed defrost water into the signal terminal, intermittently shorting a sensor. The controller thought the compressor was overloaded, so it had cycled the main unit until the relay burned while locking the backup chiller behind remote authorization. With the city's network jammed, that authorization would never arrive. This was not one failure. It was three locked doors. Lin disconnected the terminal, bypassed the wet sensor, and wired his multimeter into the circuit to simulate a steady resistance. He removed the burned relay.