GE AKTA avant User Manual page 398

8 Troubleshooting
8.6 Troubleshooting: Pumps
Problem
Leakage around a con-
nector
Erratic pump pressure
The pump is not found
by the instrument
The internal tempera-
ture of the pump is too
high
398
Possible cause and action
Leaking connection and/or crystallized material
•
around a connector
Unscrew the connector and check if it is worn or incor-
rectly fitted. If so, replace the connector. Gently finger
tighten the connector.
Air trapped in the pump heads
•
Partially blocked solvent filters
•
Leaking connections
•
Piston seal leakage
•
Check valve malfunction
•
Piston damaged
•
See Examples of pump pressure curves, on page 400
for examples of pump pressure curves.
The cable between the pump and the ICU is not
•
connected.
Contact Service.
A fuse in the instrument ICU is broken.
•
Contact Service.
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.
ÄKTA avant User Manual 29035184 AE