Hi

The turbo controller on the Kiel is probably the same one that is 
used on the MAT95/900 instruments which are made by Thermo not Pfeiffer.
The red LEDs signify that the backing pressure is not high enough or 
the TMH-071P turbo itself has not reached the 80% speed within the 8 
minute time slot. This could be due to a leak somewhere or the 
bearings of the turbo itself have gone, I doubt whether its the 
controller. It's probably just as easy to whip out the turbo and see 
if the rotor spins round which you can do by just blowing on it. If 
it is jammed then send it back to Pfeiffer for an exchange pump. We 
had this problem on our Kiel device.

Regards

John



At 18:46 05/06/2008, you wrote:
>We had to turn off the power to our Kiel and the turbo does not come 
>back.  We get a series of red leds, rather than the normal green 
>led.  I assume this is bad news, either the controller or the pump. 
>Does anyone know what the red leds mean.

John Hill
Mass Spectrometry Facility
University College London
Chemistry Department
20 Gordon St.
London
WC1H 0AJ

Tel:  020 7679 4605
Fax: 020 7679 7451