Hi Mack
I have sent you a PM of where you can download the service manual as I dont know if you have it. That error, if you look at 3.5.1 it says that you will need see the part no. you require.
The other thing you may try if you havent is to change the probe and restart it. Inside there is maybe a chip that needs resetted as they have a tendancy to subjected to the drop test on the ward.
The guys at welch allyn are good and will talk to you about the fault if you give them a call. The parts are resonably priced aswell.
cheers Billy
ps North or South Island
