I need some help. I have a single Dynon Skyview in my RV7 with a recently installed EarthX ETX680 Lithium FePo4battery, a Plane Power 60 A Alternator (internal Regulator) . My ammeter measures Alternator output( Position B as per Dynon).
For 2 recent successive flights, my' amps low' warning flashed and the ammeter was reading erratically minus 8-25A and occasionally reading normal( i.e. pos 6-7A). Throughout these flights of several hours bus voltage remained at 14.1- 14.2v. If I flicked the Alternator off and then on again the ammeter reading would briefly read 'normal' + 6-7 Amp for a few moments before returning to erratic negative values. I assumed that the fault lay with the ammeter connections or in the EMS monitor of the Skyview.
Normally after each flight my EarthX battery reads 13.4v and drops to 13.2 over the next 24-48 hrs. Just after my erratic ammeter reading episodes, I found a screw on the ammeter attachment to the Dynon supplied shunt, was a little loose. I tightened this screw and checked the other.
The next 2 flights have indicated 'normal' +6-7Amps with so far no erratic readings.
Before one recent flight, I noticed the EarthX battery Voltage was only 13.0 V ( even tho before previous flight shutdown bus voltage was 14.2V). This suggested the battery had discharged. After startup on this time the ammeter ( i.e. Alternator output) was outputting at first 55Amp and stayed high for at least 10 mins , suggesting the battery was accepting lots of charge.
My most recent flight was normal. i.e. prestart Batt voltage 13.1V, 'normal' ammeter output 25 Amp for 5 mins , settling to 6-7 Amps when airborne, and a flight bus Voltage of 14.3v .
The problems have settled but will this all occur again. Can anyone offer insights as to the real problem? Dynon say send the EMS back to the US if needed . Kathy at EarthX says if the battery is not holding charge it will be faulty . Sorry for long story . Jeff R Australia
For 2 recent successive flights, my' amps low' warning flashed and the ammeter was reading erratically minus 8-25A and occasionally reading normal( i.e. pos 6-7A). Throughout these flights of several hours bus voltage remained at 14.1- 14.2v. If I flicked the Alternator off and then on again the ammeter reading would briefly read 'normal' + 6-7 Amp for a few moments before returning to erratic negative values. I assumed that the fault lay with the ammeter connections or in the EMS monitor of the Skyview.
Normally after each flight my EarthX battery reads 13.4v and drops to 13.2 over the next 24-48 hrs. Just after my erratic ammeter reading episodes, I found a screw on the ammeter attachment to the Dynon supplied shunt, was a little loose. I tightened this screw and checked the other.
The next 2 flights have indicated 'normal' +6-7Amps with so far no erratic readings.
Before one recent flight, I noticed the EarthX battery Voltage was only 13.0 V ( even tho before previous flight shutdown bus voltage was 14.2V). This suggested the battery had discharged. After startup on this time the ammeter ( i.e. Alternator output) was outputting at first 55Amp and stayed high for at least 10 mins , suggesting the battery was accepting lots of charge.
My most recent flight was normal. i.e. prestart Batt voltage 13.1V, 'normal' ammeter output 25 Amp for 5 mins , settling to 6-7 Amps when airborne, and a flight bus Voltage of 14.3v .
The problems have settled but will this all occur again. Can anyone offer insights as to the real problem? Dynon say send the EMS back to the US if needed . Kathy at EarthX says if the battery is not holding charge it will be faulty . Sorry for long story . Jeff R Australia