Fault List & Troubleshooting 457
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7.1.5 Line A/B Monitor Fault
This error is mainly for loudspeakers connected to the IDA8C/S's speaker zone output connectors.
There are three kinds of faults:
Line A/B Open:
If the value of Measure (ohm) is greater than 4000 ohm, this fault can be recognized by IDA8C/S
when the field of [Measure(ohm)] shows "OPEN".
Line A/B Bad Impedance:
If the value of Measure (ohm) is greater than Reference A&B (ohm) + Tolerance (%), or the value
of Measure (ohm) is less than Reference A&B (ohm) - Tolerance (%), this fault can be
recognized by the IDA8C/S when the field of [Diff(%)] shows the percentage of difference.
In the figure, the difference in the percentage of Zone 4 is 78.24 which is greater than the
tolerance of 15%, a Line A/B bad impedance is recognized.
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