Troubleshooting - Acom 2000R Operating Manual

All voltages delivered from the LOW VOLTAGE and HIGH VOLTAGE SUPPLY PCBs, tubes currents,
temperatures and airflow cooling capability are permanently monitored. A lot of software-derived
protections are based on this information.
The SIGNAL FILTER PCB and RFC1 eliminate RF feedback from incoming cables, including the mains
power cord. The Remote Control Unit (RCU) is based on the same 80C31 microprocessor and uses a
dot-matrix back-lighted alphanumeric 40-character liquid crystal display.
Detailed electrical schematic diagrams are available in the TECHNICAL SUPPLEMENT to this manual.
Contact your dealer for details.

6-6. Troubleshooting

Should the RCU display indicate a problem, look up the message in the list below and before you
contact the service of your dealer(see S.1-2 and S.5-3), try the recommendations. The messages are
listed in an alphabetic order. The abbreviations used for some recommendations are decoded after the
list.
In case of necessity of transportation see S.7-3.
MESSAGE
ADC - OVERFLOW
ANTENNA CONTROL UNIT MALFUNCTION
ANTENNA RELAY CLOSED
IT SHOULD BE OPEN
ANTENNA RELAY OPEN
IT SHOULD BE CLOSED
ARC FAULT
AUTOMATIC PROTECTION
DRIVE POWER REMOVED
BAND SWITCH SYSTEM MALFUNCTION
BIAS CONTROL MALFUNCTION
BIAS TOO LOW AT POWER ON
BIAS VOLTAGE TOO LOW
COVER INTERLOCK OPEN
DETECTED RF POWER AT WRONG TIME
26
RECOMMENDATION
OFF5*
check the control cable from the amplifier IN-
TERFACE connector to ACU (Antenna Con-
trol Unit, if there is one).
CCC*
CCC*
try again; check antenna cable, selector, an-
tenna and grounding for loose contacts or
worsened insulation.
power not removed more than 10 seconds af-
ter the message "REMOVE AND REDUCE
DRIVE POWER" appeared.
OFF5*
OFF5*; CCC*
OFF5*; CCC*
OFF5*; CCC*
Check cover; OFF5*
Check if there is power in the antenna induced
from another nearby transmitter; CCC;OFF5*