User's Manual
27
C A U T I O N
Do not use solvents for cleaning – they can be dangerous to you,
as well as to the coating or the amplier plastic parts.
In case of need, clean up the amplier outside surfaces without opening it. Use a soft piece of cotton
cloth, slightly moistened with clean water.
7-2. Replacement of fuses
W A R N I N G HIGH VOLTAGE!
If replacement of fuses is necessary, rst pull out the
amplier mains plug from the mains outlet and wait for at
least 3 minutes!
The main fuses of the amplier are located on the rear panel – Fig. 2-1.
The fuses must be of the fast type, European size 5x20mm, rated for 250VAC and rated as follows:
C A U T I O N
The fuses must be rated for a current corresponding to your
mains nominal voltage: 16А for operation from 100-120VAC
mains voltage or 10А for operation from 200-240VAC. Use
only standard fuses!
C A U T I O N
Never replace any fuses inside the amplier without special
instructions from your dealer! Blown internal fuses can be a
symptom of a more serious problem, which should be resolved
beforehand. Unauthorized replacement of inside fuses infringes
the warranty conditions!
7-3. Using the fault codes (signatures) for diagnostics
The data of the last 28 HARD FAULT protection trips is stored in the amplier memory – see S. 4-6(c).
The data can be downloaded from the memory through the RS232 port and stored in a computer le
even if the amplier cannot be turned on after a serious fault – only external power has to be fed to the
Control unit in either of the following ways:
- 8 to 15V DC voltage applied to the “Debug mode” input (Table 2-1) of the CAT/AUX port. The
power supply has to be capable to provide 0.4A of current;
- if the Control board has already been removed from the amplier, it can be powered directly with
+5V (0.4A) and the fault log downloaded via the RS232 port.
In the FAULT LOG reading mode (Fig. 5-5), the Control board automatically transmits the data from the
memory trough the RS232 interface. Depending on the number of fault events stored in the memory, the
transmission may take between 0.5 and 12 seconds. A pause of 6 seconds follows, than transmission
starts again. The data can be read in a plain-text format with a computer, using a standard terminal
program.
You can send the recorded le to your dealer or to ACOM accordingly. They could also provide the