Advent Communications
209297 – DCU5000 Drive Control Unit
Page 14 of 42
The standard Advent antenna controllers decode the DCU alarms to give a text
description and a fault code number as shown in the table above. The fault code
makes the communication of the faults seen to Advent Customer support less
ambiguous.
4.2.
F1: DCU POWER SUPPLY VOLTAGE LOW
The in12V supply has been measured at below 9.5V. The voltage supplied
from the 12V nominal supply is approaching the minimum required to drive the
antenna.
This alarm is latched, and has to be cleared through the alarm clear menu option.
4.3.
F2: DCU MOTOR SUPPLY FAILURE
The a36V motor supply is out of specification. This means the motor power
may not be sufficient to drive the motors so the antenna may stall if moved.
4.4.
F3: MOTOR DRIVE MODULE INHIBIT
The stepper motor drive module has inhibited itself.
Possible causes:
Over temperature. The module has overheated due to a combination of high
ambient temperature and long driving periods of the motors. Check for an over
temperature alarm, and check the current fin temperatures.
Check that the side ventilation grills are clear to allow adequate airflow
A short circuit of one of the stepper motor windings also causes the motor
module to inhibit.
4.5.
F4: INCLINOMETER FAILED
The inclinometer, if fitted to the elevation axis, has stopped responding to data
requests. The RF angle will be estimated using the systems internal elevation axis
based on motor turns and pulse counting. Possible causes:
Inclinometer broken.
Inclinometer disconnected, or wire crimp failure.
4.6.
F5: INCLINOMETER SUSPECT
The RF angle calculated from the inclinometer, if fitted, and the internal elevation axis
disagree by more than 15°. Possible causes:
Antenna base on a very steep slope.
If the elevation axis display on antenna controller is continuously approximately
45°±5° and no inclinometer error is reported, possible inclinometer connector crimp
failure.
4.7.
F6: STALL DETECTED
A drive axis stall has been detected. It is possible that a stall on an axis can clear itself
and this alarm shows the cause of the axis becoming uncalibrated.
Possible causes:
Axis hitting physical end stop.
Moving antenna under high wind or snow loading.
This alarm is latched, and has to be cleared through the alarm clear menu option.
Summary of Contents for ADVENT DCU5000
Page 3: ...Advent Communications EMC DECLARATION 209297 DCU5000 Drive Control Unit Page 3 of 42 ...
Page 41: ...Advent Communications 209297 DCU5000 Drive Control Unit Page 41 of 42 8 FIGURES ...
Page 42: ...Advent Communications FIGURE 1 DCU5000 LAYOUT 209297 DCU5000 Drive Control Unit Page 42 of 42 ...
