The front panel “Ready” indicator shows the state of the AI-7160. Normally it should be illuminated all the time. However, if it flashes or is not illuminated then that indicates an error condition.

The various states of the “Ready” indicator are summarized in the following table.

READY Indicator	State	Description
On	Normal operation	No critical errors detected, device operating normally.
Flashing	Error condition detected	An error condition has been detected. The state of the “Ringing” and “Off-Hook” indicators determine the type of error.
Blinks a number of times every 3 seconds	Terminal fault detected	A terminal fault was detected that prevents the firmware from continuing normal operation. One to nine blinks are generated by the “Ready” indicator every 3 seconds. The unit must be power cycled to recover.
Off	Power failure, hardware fault, or bootloader activated	Either the power supply failed, or the MCU encountered a hard fault, or the firmware boot loader program is active. In all cases normal communication with the device is not possible.

When an error occurs the “Ringing” and “Off-Hook” indicators can be used to provide more information on the type of error. The following table summaries the possible error conditions.

RINGING Indicator	OFF-HOOK Indicator	Description
Off	Off	Internal software operating system fault.
On	Off	EEPROM memory has been found to be corrupted. The default values for all settings are used instead.
Flashing	Off	Power supply under voltage. This indicates a possible failure of the internal power supply

If any of these error conditions are encountered please contact technical support for assistance. The unit may have to be returned for repair.