communication problem with the QQQ 6470

Hi,

We have an error message displayed as shown in the attached photo. What should be done to unlock the system. We turned off, restart the PC but the problem still persists

Thanks

What the error message is displayed in Lab Advisor? Can you see it MH logbook? What the pop-up banner displays if point the mouse on each "red brick"? I suppose the error is concerning with an LC, not the MS

Hello,

In the logbook, this is the message:

ALS_1: G7129B: DEBA902302-Shutdown [EE 00063, 0]

Yes the error concerns the LC and not the MS

On the red banner, the message is:degasser's pressure limit violation, shutdown. Not ready condition: shutdown, drive off, out valve block position

Thank you

 Hello,

It seems the degasser is the reason of the Shutdown. The degasser is inside the pump. Just try to remove the pump from instrument configuration and switch it OFF. Then load the MH again and check if the error gone. If yes then the reason is in the pump. Replace the degasser. 

Regards

Oleksandr

Hello,

Thank you for your reply

There were definitely air bubbles in the HPLC system, because the column pressure was fluctuating a lot and the column had started leaking. And immediately the whole system crashed. The most urgent thing is to unblock the system to perform a system purge

Hello Oleksandr,

Thank you for your help,

the 640 spectrometer works, however the flow rate of the infinity 1290 pump is not regular and therefore the pressure is not stable.
we purged all the channels with isopropanol but the problem persists.
We removed the column and despite this, the pressure varies
As mobile phase we only use water with acetonitrile.
How to resolve this flow problem?

Thanks

Faïza

Hello Oleksandr,

Thank you for your help,

the 640 spectrometer works, however the flow rate of the infinity 1290 pump is not regular and therefore the pressure is not stable.
we purged all the channels with isopropanol but the problem persists.
We removed the column and despite this, the pressure varies
As mobile phase we only use water with acetonitrile.
How to resolve this flow problem?

Thanks

Faïza

Hello!

You have to check your 1290 pump. Inlet or outlet ball valve on one of the heads or both maybe malfunctioning and requires replacement. 

Hello

Thank you for your reply

What is damaging these pump heads or valves? because we are careful and we do not use buffered mobile phase?

Regards