User manual: Installation and Operation of Direction Finder System RHOTHETA RT-600 / SAR-DF 517
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3 Error messages
If an internal error of the device is recognized, a corresponding, flashing error message will be shown in the DF
pages:
Error Message
(1)
Error message including error code (in brackets)
(2)
Short description of the indicated error.
In case of coincidence of various errors, the error with the highest
priority will be displayed.
Error message
Error, location
Reason
Error: (12)
VOLT.DU
Main voltage supply Main Voltage input too low (
≤
10.0 V)
Error: (11)
NO AU
Connection:
antenna
display
or Antenna Unit
No serial data (RS485) from Antenna Unit. No or damaged
connection between antenna and display, or damaged antenna unit.
Error: (10)
BAD AU
Connection:
antenna
display
Incompatibility or bad data connection between display and antenna.
Error: (9)
BAD RU
Remote Unit:
Incompatibility or bad data connection between display and external
serial Remote Unit or PC
Error: (8)
VOLT.AU
Antenna Unit:
Voltage supply at Antenna Unit too low (
≤
9.0 V). Main voltage supply
too low or considerable drop of voltage between display and
antenna.
Error: (7)
BAD DCU
Connection:
Display
Antenna
Incompatibility or bad data connection between antenna and display.
Error: (6)
NO DCU
Connection:
Display
Antenna
No serial data from Display Control Unit to Antenna Unit.
Error: (5)
PLL ERR
antenna
Error in synthesizer-oscillator of receiver in Antenna Unit.
Error: (4)
FRQ+OFS
received transmitter Received frequency too high (more than 6 KHz / error of transmitter)
Error: (3)
FRQ-OFS
received transmitter received frequency too low (more than 6 KHZ / error of transmitter)
Error: (2)
DECODE
radio distance:
transmitter
⇔
DF
Data Bits of decoded signal (COSPAS-SARSAT or LoJack) defective
Error: (1)
DATARNG
Incompatibility of:
data DCU
⇔
AU
Protocol data bytes out of valid range.
Error: (0)
NO REC
Antenna Unit:
receiver
Receiver board defective
