GE AKTA avant User Manual page 379

Pressure monitors
Problem
Pressure offset
Excessively high pres-
sure values
The pressure monitors
are not found by the
instrument
The internal tempera-
ture of the pressure
monitor is too high
ÄKTA avant User Manual 29035184 AE
Possible cause and action
The monitors have lost their calibration
•
Calibrate the pressure monitors. See Section 7.7.2
Calibrate the pressure monitors, on page 323.
The temperature has changed
•
Wait until the temperature has stabilized and calibrate
the pressure monitors.
Incorrect installation of extra Column valve
•
Check installation positions and tubing connections.
Refer to the installation instructions delivered together
with the extra valve.
Unclean inline filter in the Mixer
•
Replace the inline filter in the Mixer. See Section 7.3.2
Replace the inline filter, on page 275.
Solids in the flow path
•
To use the predefined method System CIP to clean the
flow path, see .
To clean the column, see Section 7.6.2 Perform System
CIP, on page 289. If persistent, replace the column.
The cable between the Pressure monitors and the
•
ICU is not connected.
Remove the monitor and make sure that the cable is
connected.
The air intake on the rear or on the left side of the
•
instrument is covered
Make sure that none of the air intakes on the instru-
ment are covered.
Hot surroundings
•
Decrease the room temperature. Maximum operating
temperature is 35°C.
Hardware error
•
Switch off the instrument and wait until the tempera-
ture has decreased. Restart the instrument. If this error
is recurrent, generate a System error report and con-
tact Service.
8 Troubleshooting
8.3 Troubleshooting: Monitors
379