Protection; Start Up Errors - RM Italy BLA600 User Manual

11. Protection:

The BLA600 has a comprehensive and rapid reacting protection system. The
following parameters are continually monitored during operation. RF input
frequency, (within limits of operation bandwidth), RF drive level (40W 160m, 25W
all other bands). Forward and Reflected voltages, from which the VSWR is
calculated, (maximum VSWR 2.5-3:1). Drain voltage (Vd) both high and low limits,
Drain current Id, (Both software and hardware monitored), Transistor temperature,
Heatsink temperature, Power Supply temperature. PIN switch HV and control
signals and Cooling Fan speed.

Start Up Errors

During the start-up self test should any of the following errors occur refer to the
descripton below for explanation:
S1 Error with the cooling fans. Check for obstructions and reboot the amplifier. If
the problem persists consult your dealer.
S2 Control of (Vd) drain voltage, (above 48V). If this error occurs check that the
AC supply voltage is within normal limits.
S3 Control of (Vd) drain voltage, (below 70V). Again check that the AC supply
voltage is within normal limits.
S4 Control of (Vd) drain voltage , above 48V when transistor bias is tested.
S5 Control of transistor bias current above lower limit
PTT is active check radio is not in TX or PTT cable is not
damaged. Remove PTT connector from rear panel and retry.
Check that there is nothing obstructing the fans blades.
Pressing the '+' key ` will allow the amplifier to function,
however we do not recommend this to be done. Reboot the
amplifier and try again. If the problem continues consult your
dealer.
The BLA600 makes a series of self tests during the start
up sequence. If any of the following errors occur refer to
the description below
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