PJ5000U-K
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User Manual
Rev. 3.0 - 21/03/18
The user may press the ALARMS RESET key, in alarms menu, to interact with
the protection system. ..
If the system is transmitting but alarms were triggered earlier causing certain
counters not to be at “0”, will have no effect unless it is pressed while inside the
alarm menu. As such, the system will be sure that the user takes note of the alarms
that were triggered before resetting them..
The system resets the alarm counters automatically after thirty minutes of operation,
i.e. the user need not do anything, if the amplifier does not trigger any alarms or
after the machine the machine has been turned OFF and then back ON..
5.4.1 Auxiliary Protection
The amplifier contains a second microcontroller that manages local measurements
and carries out auxiliary protection functions of the machine together with the main
protection system. This microcontroller card indicates its interventions via LEDsii
interventi tramite i LED.
A delivered power automatic back-off mechanism is envisaged for excess
temperature, SWR or current absorbed by a MOSFET module. The yellow
FOLDBACK LED indicates this case..
A FAULT signal is triggered (red LED) when a fault occurs that stops the power
amplifier. This situation is signaled to the machine’s main microcontroller as well
and triggers a lock situation (FAULT)..
The LED FUSE BLOWN indicates that one of the fuses that protects the power
supply of the MOSFET modules has blown. In this case the machine keeps running
as usual (obviously without the contribution of the module) even if it is advisable
to single out and clear the cause for the malfunction and replace the fuse as soon
as possible to fully restore the machine’s working efficiency..
5.4.2 Power Supply Units
Power Supply Units
Three power supply units, which work in parallel mode, power the machine. Should
one of the power supply units malfunction, the machine automatically compensates
the delivered power down to a value compatible with the current deliverable from
the surviving power supply. This situation is indicated by the “PS” LEDs on the
front panel..