C-4 Operation Error Messages Error Messages
C-6 PN: 10580-00305 Rev. L MS20xxC UG
C-4 Operation Error Messages
Fan Failure
The system has determined that the fan should be running due to the internal temperature of
the unit, but cannot detect that the fan is actually running.
It is important to keep the fan inlet and exhaust ports clear of obstructions. The cooling fan
will vary the speed in relation to the internal temperature of the instrument (refer to
Figure C-4). The fan will turn on at low speed when the internal temperature of the
instrument reaches 44ºC, and will increase the fan speed to maximum at 54ºC. As the
internal temperature of the instrument decreases, the fan will reduce speed until the
temperature reaches 39ºC, at which point the fan will turn off.
High Temp Warning
The internal temperature has reached an excessive level, 85ºC. Verify that the ventilation
openings are unobstructed and that the fan is running. Internal temperatures may be
manually verified by using the SELF TEST function. Turn off the unit and allow the
temperature to cool down. If the fault is not resolved and the internal temperature reaches
90ºC, then a countdown of 10 seconds will begin. The countdown gives the user a chance to
save the current setup before the instrument turns itself off (before internal temperatures
can cause any damage). If the error persists after removing any obstructions and allowing the
unit to cool, then reset to the factory defaults with Factory Defaults (Esc+On), or
Master Reset (System+On).
Figure C-4. Fan Speed vs. Temperature
Caution
Use of Master Reset (System+On), will permanently erase all user saved setups
and measurement traces and will return the VNA Master to a full Factory Default
condition. Be sure to make backup copies of any important files before proceeding
with a Master Reset. If the error persists, contact your Anritsu Service Center.
FAN
SPEED
OFF LOW HIGH
H
I
T
E
M
P
W
A
R
N
IN
G
A
U
T
O
S
H
U
T
O
F
F
Temperature Rising
FAN
SPEED
OFF LOW HIGH
Temperature Falling
TEMP
39
41
43
45
47
49
51
53
-100
85
90
+100
o
C
40
42
44
46
48
50
52
54
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