ITB ARCHIMEDE 5000 Series, User Manual

Page: 47 / 65

Archimede 5000 series- FM Power Amplifiers
User’s manual – Page 47 of 65
13 T
R O U B L E S H O O T I N G AN D A L AR M S
If all instructions described in this manual are followed, the equipment will guarantee several years of perfect service. However,
should problems arise, see this chapter before contacting the local authorized assistance point.
13.1 Types of alarms and relevant LED information
In case of alarm the ALARM LED [11] will glow red.
During the operation, two kinds of alarms could happen: non critical alarms (e.g. heatsink temperature between 90 and 99°C) and
critical alarms (e.g. heatsink temperature over 99°C).

Non critical alarms - the ON [9] and ALARM [11] LEDs are glowing and the STAND-BY LED is off. In this condition the
equipment can go on working.

Critical alarms - the ON LED is off and the ALARM and STAND-BY [10] LEDs are glowing. In this condition the equipment
automatically gets into stand-by mode and the LCD display shows the active alarm name.
The alarm types are:

Reflected power over threshold - the factory-set threshold depends on the model ( Archimede 3000 : 200W / Archimede
4000 : 250W / Archimede 5000 : 300W). When reaching this value, the equipment reduces its output power in order to keep the
reflected power below the threshold. If the reflected power exceeds the threshold, the amplifier automatically gets into stand-by
mode ( STAND-BY LED starts glowing).

Heatsink temperature over threshold
– the equipment mounts on the heatsink two temperature sensors (see the image here
below)
, the average of their values sets the “measured heatsink temperature”. if this value exceeds the 90°C threshold, the
ALARM LED glows, but the unit keeps still working. If the temperature reaches 100°C, the ALARM LED keeps glowing and the
equipment gets into stand-by mode ( STAND-BY LED starts glowing).

Environmental temperature over threshold
– on the internal side of the front panel there is a temperature sensor in TO220
case which measures the environmental temperature. If this temperature exceeds 45°C the amplifier reduces its output power
according to the internal temperature. If the environmental temperature exceeds 55°C, the equipment automatically gets into
stand-by mode.

Direct Power under threshold
– This alarm becomes active if the output power goes under the user set level (

Par.8.1.b).

All alarms are auto-resettable. This means that if an alarm ends (and there are no other active alarms) the ALARM LED stops
glowing and, if the equipment was in stand-by status due to a previous active alarm, the amplifier status automatically reverts
from the stand-by mode to the operation one.
Equipment bottom view
(R.F. amplifier section)
Heatsink temperature
sensors