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: Fan Speed vs. Temperature). The fan will turn on at low speed when the internal temperature of the instrument reaches 44º C, and will increase the fan speed to maximum at 54º C. As the internal temperature of the instrument decreases, the fan will reduce speed until the temperature reaches 39º C, at which point the fan will turn off.
Fan Speed vs. Temperature
High Temp Warning
The internal temperature has reached an excessive level, 85º C. 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 90º C, 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).
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.
Operation not Permitted in Recall Mode
Attempted to perform an operation on a recalled trace. Many operations are valid only on a live or active trace.
PMON PLD Fail
Unable to communicate with the Power Monitor PCBA.
Power Supply
Power Supply failed. Charge the battery.
Error Saving File. General Error Saving File
An error was detected while saving a file. Try again.
