PROTECT mode is circuitry that prevents damage to the receiver in the event of an overload, short circuit, or overheating. Possible reasons for the protect mode to be activated are loose or frayed wires, playing the volume at unreasonable levels which may overdrive the amplifier, or positioning the unit in a location without proper ventilation.
If your unit is in PROTECT mode, please contact us to determine why this may be happening. Once the issue has been corrected, the unit should operate normally. However - if damage has already occurred internally, you'll need to get the unit to your nearest authorized service center. Authorized Service Centers can be located in the Support menu on our website. For warranty repair, you would need to provide a copy of your sales receipt to the service center