120deg / Lane A Flashing
in 912iS Technical Questions
8 years ago
Hi All
I have a Sling 2, 912is Sport and Garmin G3X Touch.
Today we were conducting our final high-power ground runs before a first flight in the next few days. We knew the temps would climb (as they did) as we were anchored as we ran at full power.
As soon as the temp hit 120 deg celsius, the Lane A light started flashing and the Garmin put a red X through the Cooland Temp part of the display. We know the sensor is fine as we tested it with a multi-meter and heated it (through a different heat source) above 120 deg.
So we now know that the Rotax ECU stops sending coolant data on the can after 120 deg is reached - you then need to recycle the lane A until the temp reduces below 120 degrees then all is normal again.
Question: Is it normal for the Lane A light to flash once the temp exceeds 120 deg c and is it normal that the computers stop sending coolant data along the Can Bus? I notice on the other recent coolant thread that someone said the same thing with the Dynon - the temp indicator stopped displaying at 120 deg (because I know know the ECU stops sending the info).
If this is the case, isn't it odd that you would have to recycle a lane switch say in a climb (or emergency) if your coolant temp reached its maximum?
I would have thought the computers should keep sending data along the CanBus so the EFIS can report the exact temperature, even if the temps have been exceeded? There is no way of knowing your temperature above 120 degrees (if you ever got there).
And of course you just have to keep recycling the Lane A switch until it stops flashing - this may take 5 attempts as you can't tell the temperature?
I may never have this issue once flying (with the cooling from the airflow) but I just want to check that it is normal that the Lane light starts flashing and the ECU stops sending cooland temp down the canbus.
Thanks,
Ian
I have a Sling 2, 912is Sport and Garmin G3X Touch.
Today we were conducting our final high-power ground runs before a first flight in the next few days. We knew the temps would climb (as they did) as we were anchored as we ran at full power.
As soon as the temp hit 120 deg celsius, the Lane A light started flashing and the Garmin put a red X through the Cooland Temp part of the display. We know the sensor is fine as we tested it with a multi-meter and heated it (through a different heat source) above 120 deg.
So we now know that the Rotax ECU stops sending coolant data on the can after 120 deg is reached - you then need to recycle the lane A until the temp reduces below 120 degrees then all is normal again.
Question: Is it normal for the Lane A light to flash once the temp exceeds 120 deg c and is it normal that the computers stop sending coolant data along the Can Bus? I notice on the other recent coolant thread that someone said the same thing with the Dynon - the temp indicator stopped displaying at 120 deg (because I know know the ECU stops sending the info).
If this is the case, isn't it odd that you would have to recycle a lane switch say in a climb (or emergency) if your coolant temp reached its maximum?
I would have thought the computers should keep sending data along the CanBus so the EFIS can report the exact temperature, even if the temps have been exceeded? There is no way of knowing your temperature above 120 degrees (if you ever got there).
And of course you just have to keep recycling the Lane A switch until it stops flashing - this may take 5 attempts as you can't tell the temperature?
I may never have this issue once flying (with the cooling from the airflow) but I just want to check that it is normal that the Lane light starts flashing and the ECU stops sending cooland temp down the canbus.
Thanks,
Ian
