90-0-92 appears on electronic-control Classic Built-In units, the BI-36U/S among them, when the control network reports excessive collisions. Two devices are trying to talk on the shared data line at the same moment so often that…
90-0-92 appears on electronic-control Classic Built-In units, the BI-36U/S among them, when the control network reports excessive collisions. Two devices are trying to talk on the shared data line at the same moment so often that messages keep getting lost. The control counts this as a microcontroller problem. Expect occasional unresponsive keys, delayed display updates or odd resets rather than an immediate loss of cooling.
1. Record 90-0-92 and any other code shown. 2. Turn the breaker off for two minutes and back on. 3. Note whether the code returns at a specific time, such as when the ice maker or a light runs. 4. Contact us if it repeats.
Several boards share one data line. A collision happens when two talk at once. A few are normal, but 90-0-92 means they are happening often enough to disrupt control.
Usually not at first, since cooling commands still get through. Left alone, though, missed messages can upset fans or defrost, so it is best checked soon.
We isolate each device on the communication line until the collisions stop. The repair is priced in writing before we begin, and our labor has a 30-day warranty.
A technician diagnoses it on site and gives you the price in writing before any work starts.
