Maintenance; Indication Of Fault Conditions - OM POWER OM2000A+ Manual

6.

MAINTENANCE

6.1.

Indication of Fault Conditions

If a fault condition appears during the operation of the amplifier, the safety circuits of OM2000A+ will react. There
are several warning or fault messages possible to appear on the display, when some of the protection will be
activated. The OM2000A+ power amplifier can report one of the following messages:
Power Out is too high
Refl. power too high
Power In is too high
Low output power (tune)
Plate current too high
Grid current is high
Screen current error
Heating voltage error
HARD FAULT
Plate voltage error
Grid voltage is low
Screen voltage error
SWR is too high
Amplifier is too hot
Most of safety circuits are preset for two levels of exceedances. First level is a warning level. In such a
case a warning message appears on the display, but power amplifier will stay in normal operation. See
the table below for warning and fault conditions.
When a fault condition appears during the tuning or operation of the amplifier, the safety circuits will
block transmitting. The amplifier stays in OPER mode. After approx. 1 sec the control circuits will
automatically switch the amplifier back to the transmitting mode. If problem persists, safety circuit will
react again.
If the fault will repeat 3 times during 10 seconds, the safety circuits will turn the amplifier to STBY
mode. To cancel fault status, press STBY/OPER shortly. Power amplifier will stay in STBY mode.
All the warning and fault messages are stored in the memory. You can display particularly warning messages and
particularly error messages. They are stored one by one to the memory. You can see them on the display. If
memory is full, every new message will delete oldest one and move rest of them one position back. It means that
every time last 20 messages are visible on the display.
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