User manual

TROUBLESHOOTING/ALARM CODES
The alarm system monitors important system parameters and flashes a message
on the bottom line of the LCD display if an error is found. The parameters
monitored include the condition of the lithium battery, status of the azimuth and
elevation antenna drive systems, and the values of certain variables. Some error
codes have priority over others. Alarm conditions are sampled sequentially, with
the highest priority sampled first. As corrective action is taken for each error, the
code is eliminated, and if there is a lesser error, it will then appear.
Note: Caution
Do not attempt to drive the AZ, EL or POL with a external power supply
while the controller is connected to the antenna. This will result in damage to
the controller’s internal driver circuitry.
SYSTEM ERROR CODES
LOW BATTERY
The RC2000A constantly monitors the level of the lithium battery. When the
power level is low, this error code will appear. Replace the battery with a
Duracell DL2450. Make sure that the unit is unplugged from the AC power
before removing the cover to change the battery. Take care to hold the battery tab
away from the battery housing while replacing the battery and it will not be
necessary to reprogram the memory. Since there is a chance that the non-volatile
memory will be corrupted when the battery is changed, please refer to the
appendix entitled 'Restoring the Non-Volatile Memory' before changing the
battery.
AZIM LIMITS, ELEV LIMITS
One of the antenna software limits has been corrupted. Go into LIMITS mode and
reset the software limits. See Section 4.11
POL LIMITS
This error indicates that the polarization motor limits have been corrupted when
either the RC2KPOL or RC2KHPP option is installed (allowing the RC2000A to
interface to a motorized feed with potentiometer feedback). The limits for the
polarization motor are set via POL LIMITS mode. See sections 3.3 and 4.10.12.