(Error 4): Cel-Fi SOLO is overheating.
Your Cel-Fi SOLO is overheating. Please ensure that your Cel-Fi SOLO is clear of any blockage. If you have your Cel-Fi SOLO in the exceptionally warm area you may need to relocate the device to ensure that this unit does not continue to overheat.
Once Cel-Fi SOLO has cooled it will operate as normal.
Normal operating temperature of the Cel-Fi SOLO is 0-20 Celsius.