ARMA-C250-CRM
42
6.
ALARMS AND FAULTS
The amplifier monitors all key operating parameters and provides alarm and fault signals both on
the front panel and remotely. Two LED indicators on the amplifier identify ALARM or FAULT
conditions respectively. Also during a fault condition, a display similar to the following will
appear on the front panel:
An ALARM signals that a fault has been detected that may reduce amplifier’s performance or, if
allowed to continue uncorrected, may lead to a FAULT condition, see
at page 22. An ALARM will not cause automatic amplifier shutdown. A FAULT
condition occurs when a fault has been detected which has caused, or is likely to cause an
amplifier failure. As such, a FAULT may cause automatic amplifier shutdown depending on the
nature of the fault.
6.1
THERMAL ALARMS AND FAULTS
The amplifier continually monitors internal temperature and current consumption and includes an
automatic shutdown feature to prevent operation at excessive temperatures.
An alarm will be triggered when the internal temperature of the amplifier exceeds 70
°
C. Amplifier
will continue to operate in this condition. When the base plate temperature exceeds 80
°
C or current
consumption exceeds a threshold value, a fault will be triggered and the amplifier will shutdown.
The amplifier will automatically restart when its internal temperature cools to 65°C. If a fault has
been caused by any other condition, then the status of the SSPA must be reset (i.e. to NO FAULT)
and the source of the problem should be corrected before the unit can resume operation (see
RESETTING THE SSPA below).
A thermal alarm can be caused by any of the following conditions:
•
high ambient temperature (the unit is designed to operate between 0
°
C and +50°C ambient)
•
blockage at air intake or exhaust
•
cooling fan failure
6.2
RESETTING THE SSPA
After a fault condition has been detected on the amplifier and the source of the problem
remedied, the fault must be cleared in order for the unit to resume operation. Similarly,
unforeseen circumstances might require default parameters to be reset. Thermal alarm will be
cleared after temperature drops below 65°C.
6.2.1
U
SING THE
S
ERIAL
I
NTERFACE
From Screen (menu) #1, use the function key ‘F9’ to select the desired SSPA, then press ‘F5’ to
reset the unit.
6.2.2
A
T THE
F
RONT
P
ANEL
Press
Clear]
at the front panel.
HIST.FAULT: (message)
<CLEAR> to clear
Summary of Contents for ARMA-C250-CRM
Page 13: ...ARMA C250 CRM 12 Figure 1 Product Outline redundant system front and rear views...
Page 14: ...ARMA C250 CRM 13 Figure 2 Waveguide Connections top view side view...
Page 56: ...ARMA C250 CRM 55 Figure 12 Product Outline single unit...
Page 57: ...ARMA C250 CRM 56 Figure 13 3 D View of the Redundant System in rack cabinet...
Page 58: ...ARMA C250 CRM 57 Figure 14 Enlarged 3 D View of the Redundant System in rack cabinet...