Nautel XR6, Preinstallation Manual

Page: 47 / 90

XR6/XR3 Pre-installation Manual Control and monitoring
Issue 3.0 2009-07-15 Page 6-5
Mod. protection
This fault is reported from the remote interface PWB. The fault indicates that excessive low
frequency modulation has triggered the transmitter’s protection circuit.
Softstart faults
Softstart active
The softstart relays are initially open for 1.6 seconds when the transmitter is first powered on. The
software should close the relays after 1.6 seconds and clear this alarm.
While active, this alarm causes a shutback and inhibits the RF drive and fan power supplies.
Softstart overtemp
The software keeps track of the calculated temperature of the softstart resistors and triggers this fault
if that value is greater than 150°C (302°F).While this fault is on, RF power will not be available.
The temperature is assumed to rise 20°C (68°F) for each cold start, and 10°C (50°F) for each warm
start. The calculated temperature falls exponentially between starts.
The transmitter’s GUI
Status
screen will show the current, calculated temperature, if it is above
150°C (302°F).
RF Power module faults
PM Fault A or B*
• A fault is being reported by power module A or B.
*
Note:
A second RF power module is optional with an XR6 or XR3 transmitter.
Other faults
Low backup battery
This fault indicates that the backup battery voltage has fallen below an acceptable level. The fault may
be caused by weak batteries, or a fault in the detection or alarm circuitry on the control/monitor
PWB.
CAUTION:
Performing a warm or cold start while this fault is active is strongly discouraged.