How do you troubleshoot this problem?
The Honeywell oil pressure sensor on my Rotax 912UL failed—the Dynon D180 display just showed three dashes where the oil pressure is normally indicated. The crazy part was that the failed oil pressure sensor also caused the EGT probes to read -99. Cutting the lead to the oil pressure sensor restored the EGT temps. There was some intense head scratching leading up to this which I will not recount.
Sent the D180 to Dynon; no issues with the instrument.
I replaced the previous faulty oil pressure sensor (956413/956415–the big expensive one) with the newer Honeywell version from Lockwood. Connecting the new sensor to the Dynon gives me exactly the same result—EGT probes read -99. I did the pressure purge and no oil pressure was indicated when rotating the prop.
I have experimented with all 8 possible wiring combinations of input and output wires with no joy. When the sensor is disconnected the EGT and other devices (fuel CHT OAT etc) read correctly. Though the sensor is new, my only conclusion is that it is faulty. Overtorqued and damaged?
Is there another interpretation?
The Honeywell oil pressure sensor on my Rotax 912UL failed—the Dynon D180 display just showed three dashes where the oil pressure is normally indicated. The crazy part was that the failed oil pressure sensor also caused the EGT probes to read -99. Cutting the lead to the oil pressure sensor restored the EGT temps. There was some intense head scratching leading up to this which I will not recount.
Sent the D180 to Dynon; no issues with the instrument.
I replaced the previous faulty oil pressure sensor (956413/956415–the big expensive one) with the newer Honeywell version from Lockwood. Connecting the new sensor to the Dynon gives me exactly the same result—EGT probes read -99. I did the pressure purge and no oil pressure was indicated when rotating the prop.
I have experimented with all 8 possible wiring combinations of input and output wires with no joy. When the sensor is disconnected the EGT and other devices (fuel CHT OAT etc) read correctly. Though the sensor is new, my only conclusion is that it is faulty. Overtorqued and damaged?
Is there another interpretation?
