24
„
Overdriving error
“ appears. Decrease the input power under maximum driving level, set
OPER mode again to continue transmitting.
When one half of the double MOSFET will be broken for example, or some fault in the output
circuit presents, output power of the PA will decrease rapidly. Fault message „
Gain is too
low
“ appears, amplifier will stay in OPER mode, but transmitting will be blocked. In this
situation contact the manufacturer for the assistance.
In the case of the main power supply failure, when voltage drops below 42 volts, fault
message „
Voltage is too low
“ appears, the amplifier will stay in operation mode and
transmitting will be blocked. You have to check inside fuse first. If fault persists, contact the
manufacturer or your dealer for the assistance.
When the amplifier reaches inside temperature of 70 deg. Celsius, warning message
„
Amplifier is too hot
” appears on the display. At 75 degrees protection circuit will
automatically block transmitting (fault condition). You have to decrease the power or wait
couple of minutes to be ready transmitting again.
When current of the PA exceed the limit value, „
Current is too high
“ fault message appears
on the display, amplifier will stay in operation mode and transmitting will be blocked.
Decrease input power first and try to transmit again. If this will not help and current will stay
high, contact the manufacturer for assistance.
If you turn the power amplifier ON and no LED will be illuminated, display stays dark, check
mains first, and then check fuses inside the PA (see next part for more details).
CAUTION
If MOSFET is destroyed, do NOT attempt to replace it, in any case! Contact the
manufacturer immediately.
WARNING!
Never try to change or move any part inside the amplifier except of internal fuses.
Substitution of parts may void intrinsic safety!
6.2.
Fuse Replacement
There are two fuses installed inside the OM1006 power amplifier. They are located on the
supply board on the left hand side of the PA, above the main power supply. The user
is
allowed
to change these fuses.
WARNING!
Before opening the upper lid of the amplifier make sure that power supply has been
disconnected. Take out power cord from the outlet!
OM1006 uses one fuse 10 Amps „T” type 5 x 20 mm for main 50V DC power supply and one
fuse 500mA „T“ type for small 12V DC power supply.