Some Alien 02 Single Bases (P/N 90724000) between serial numbers 4282240001 and 4290400999 may have been shipped with the fan connections swapped on the PCB. The head and base fans are temperature controlled, so if you have one of these units, we recommend that you check the fan connections as follows.
- Disconnect the base from AC Power.
- Remove 4 screws and remove the top cover from the base.
- Verify that the fan wires are connected as shown on the connections label located inside the top cover. The base fan wires are red and black. The plug for the head fan wires is labelled "6".
- Swap the fan wires if necessary and replace the top cover.