Honeywell VXP, System Maintenance Manual, Page: 65 / 105

Maintenance
VXP System Maintenance Manual 4-21
A004 Recoverable Hardware Failure.
Internally recoverable hardware problems have occurred in the VXP AU. If these
problems continue to occur through many power cycles, or if the VXP operates
in an unpredictable manner, the system may be operating under marginal
conditions and could fail in the future. Maintain copies of the downloaded Fault
Logs and contact Chadwick-Helmuth.
A005 Bad Upload File Format or File Corrupted.
Reload the application or setup configuration file. If problem persists, the
uploaded file is bad or corrupted. Correct upload file format or contact
Chadwick-Helmuth.
A006 Credit card memory system (PCMCIA card) has failed.
System will continue to run, but Credit Card cannot be used for upload or
download of program files. Use the DU communications interface to transfer
files until Chadwick-Helmuth can be contacted to resolve the problem. Note:
PCMCIA slot not accessible in ground support configuration.
A007 Calibration Error.
Analog signal input function is out of calibration. System can continue to be used
but vibration and balance readings may not be accurate. Save Fault Log and
contact Chadwick-Helmuth as soon as possible.
A008 Vibration Sensor Failure.
A vibration sensor has failed. Channel number of failed sensor is obtained from
the Fault Log. First, check connections to sensor. Next, replace failed sensor with
a known good sensor. If problem moves with the failed sensor, then replace the
sensor. If the problem does not move with the sensor, then the sensor cable is the
probable cause.
A009 No Magnetic Pickup.
No magnetic pickup signal is present. Channel number of pickup is obtained
from fault log. The rotors must be turning for the current operation. If not, the
operation must be tried when the rotors are turning. If the rotors are turning, then
remove and replace the affected magnetic pickup. If the problem persists then
check the cabling to the pickup.
A010 RPM Out Of Range.
RPM from magnetic pickup is out of range. The current operation must be
performed with the rotors turning at a specified speed. Check aircraft instruments
for correct speed (e.g. 100% Nr) and correct rotor RPM as necessary. If
instruments indicate correct speed, then problem is probably an incorrect gap
setting between the interrupter and the mag pickup. If the gap is OK, then check
both the mag pickup and its cabling.
Table 4-11. Action Codes (Continued)
ACTION
NUMBER
EXPLANATION