C2 Error indicates that C 338 is in protection mode. This can be due to power issues, overheating, or a shorted speaker/wire.
Please ensure that C 388 is on its shelf with at least 10 centimeters of air space around it.
The next time the C2 error message appears, switch OFF C 338 from the back panel for 10 minutes. Then switch it back ON. If the error message persists, disconnect the speakers, and stream the same music at the same volume setting.
If C2 error is no longer displayed, have the speaker wires and speakers tested for shorts.
Note: C 338 should have only one pair of speakers connected to it.
If the C2 error persists after performing the above steps, please carry C 338 to your nearest NAD Distributor for further evaluation.