P 2.1L user manual V6840, version 3.6
Troubleshooting
27
Can the devices communicate with the computer, even though the
router is disconnected from the company network?
5. Turn off all devices, router, and computer. Firstly, switch on the router and wait
until its self-test is finished. Secondly, switch on the devices and the computer.
Has this been successful?
6. Replace the patch cable to the device with that no connection could be estab-
lished.
Has this been successful?
7. Make sure that the IP port of the device matches the port in the chromatogra-
phy software.
Possible Problems and Rectifications
Error
Solution
Device cannot be
switched on
Inspect the power cable to ensure that it is
plugged into the power supply.
When purging, the
pump switches off.
Check if the venting screw on the pressure sen-
sor is turned up.
Pump does not
transport solvent
Purge the pump head to remove the air bub-
bles.
Clean the ball valves.
Exchange the ball valves.
If the pump head seals are defective, solvent
enters the piston backflushing; inform the
technical support of the manufacturer.
Exchange the pump head
Pressure and flow
rate variations
Purge the pump head to remove the air bub-
bles.
Let the pump run for 1 h.
Always tighten the inlet screw 1 and outlet
screw 1 on the pump head with a torque
wrench and 15 Nm.
Clean the ball valves.
Exchange the ball valves.
Exchange the pump head
Inform the Technical Support of the manufac-
turer.
Pump head leaks
Inspect the inlet and outlet screw fittings of
the pump head.
If the seals are defective, eluent enters the
piston backflushing; inform the Technical sup-
port of the manufacturer.
Exchange the pump head
Flow rate is not cor-
rect
Check the following options:
Check the data for the solvent compressibility
Cleaning the Check Valves
Exchange the ball valves
