When I power cycle my SmartPack a flashing "C" appears in the top corner of my LCD. One or more of the power cubes in the SmartPack has exceeded the maximum operating temperature of 90° Celsius. When ...When I power cycle my SmartPack a flashing "C" appears in the top corner of my LCD. One or more of the power cubes in the SmartPack has exceeded the maximum operating temperature of 90° Celsius. When you have corrected the temperature problem, the error will clear. If dust has collected inside and near the fan, thoroughly dust it out. Additionally, the power cubes may be swapped out in the field for newer power cubes. The power cubes are the items indicated in red below.