0025 00
TM 1-6625-724-13&P
0025 00-26
Table 1. Error Reported on CADU Error Screen (cont.)
Code #
Message
16405:
ACQ ROM Checksum Error ACTION: (1) Power the DAU off and on (2) Wait 20 seconds,
make a measurement
The checksum on the DAU acquisition board has returned a fault condition. Power the DAU off
and on, and then try to make a measurement. If the failure persists, send unit to TMDE for
repair.
16406:
Zero Denominator ACTION: (1) Power the DAU off and on (2) Wait 20 seconds, make a
measurement
16407:
Illegal Tacho Channel ACTION: (1) Retry measurement (2) Verify Setup - Check and Reload
aircraft script file
An illegal tachometer input channel has been specified in the aircraft setup file. Verify the
tachometer channel in the setup file.
16408:
Illegal Frequency Option ACTION: (1) Retry measurement (2) Verify Setup – Check and
Reload aircraft script file
An illegal ASPA frequency range has been specified in the aircraft setup file. Verify the ASPA
frequency range in the aircraft setup file.
16409:
ADC Error > 12 Bits ACTION. (1) Power the DAU off and on (2) Wait 20 seconds, make a
measurement
Turn the DAU off and on, and then try to make a measurement. If the failure persists, send unit
to TMDE for repair.
16410:
Attempt to Read Too Much Data ACTION: (1) Power the DAU off and on (2) Wait 20
seconds, make a measurement
16411:
Zero Revs Specified ACTION: (1) Retry measurement (2) Verify Setup - Check and Reload
aircraft script file
A measurement has been specified with no revolutions. Check the aircraft setup file for the
number of revolutions for each acquisition.
16412:
No Revs in FFT Block ACTION: (1) Power the DAU off and on (2) Wait 20 seconds, make a
measurement
16413:
Failed to Read FIFO In Time ACTION: (1) Power the DAU off and on (2) Wait 20 seconds,
make a measurement
16414:
Tacho Out of Bounds ACTION: (1) Retry measurement (2) Verify Setup - Check and
Reload aircraft script file
The measured tachometer frequency is higher than the limits specified by the aircraft setup file.
This is commonly caused by an aircraft with a double interrupter, when the setup file expects a
single interrupter. Verify the following:
1. The interrupter is the proper type and gapped correctly.
2. Rotor frequency is within the required operating range. For optical interrupters, verify the tape
is placed correctly.
16415:
ACQ Already in Use ACTION: (1) Power the DAU off and on (2) Wait 20 seconds, make a
measurement
16416:
Driver Buffer Overflow ACTION: (1) Power the DAU off and on (2) Wait 20 seconds, make a
measurement
