DAZZLER
TM
system manual Part I : installation & operation 5.6
Figure 5.15: poll message : no alarm
Figure 5.16: poll message : alarm(s) present
The message depends on the alarm type (see section 5.6.1 for more details).
• these alarms do not interfere with the RF generation: it is up to the operator to decide
when to switch off.
Please keep in mind that these alarms have been implemented to protect the gen-
erator, and thus, it is strongly recommended to stop the generator and contact
Fastlite in case these faults are continuously detected.
5.6.1 Alarms description
The alarms presently available are:
• the speed of any fan is too low. Depending of the system, there can be one to five
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cooling fans. The alarm text attempts to identify the faulty fan,
• the RF amplifier temperature is too high
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.
Exhaust fan speed
The exhaust fan is very important for cooling the generator. It is located on the generator rear
panel. Its nominal speed is ≈ 3900rpm. The speed is based on the measure of the fan rotation
sensor period. An alarm is raised when the speed is below 50% of the nominal speed which
is shown right between () in the monitor config panel. On the software front panel, the poll
message indicates that the fan alarm has been raised as shown below.
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normally there are 2 fans: cabinet exhaust and RF amplifier. High power amplifiers, when not water cooled,
have 4 to 5 fans
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most RF amplifiers have a thermoswitch in the amplifier enclosure which trip if the output transistors
temperature goes above 70
o
Figure 5.17: L2 indicator blinking : alarm(s) present
V3.00 - 8
th
April 2019 (ContentsTable) (FiguresTable) 54/94
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