My mysterious varying low voltage problem has returned. Argggghhh.
Today I began by checking voltage at several points:
At EFIS#1 per the GRT display, master on - 11.4V (Hmmmm.)
Across the battery - 12.8V (charging must be OK, despite recurring alarms!)
At the E-bus switch - 12.6V
At the E-bus feed, switch on - 12.6V
At the main bus feed, master on - 11.4 to 11.5V.
When I brought up the EFIS displays via the Ebus, there was ~2 amps drawing on the battery and a voltage of around 12.5. When I then switched the master on, the amp draw went to -9, and voltage dropped to 11.4. (The tail strobe does come on with the master, but is not more then 2 amps max)
Is it possible I have a master solenoid that's drawing inordinate current, thus explaining the low voltage alarms, even though the battery is 12.8 volts after landing?
Today I began by checking voltage at several points:
At EFIS#1 per the GRT display, master on - 11.4V (Hmmmm.)
Across the battery - 12.8V (charging must be OK, despite recurring alarms!)
At the E-bus switch - 12.6V
At the E-bus feed, switch on - 12.6V
At the main bus feed, master on - 11.4 to 11.5V.
When I brought up the EFIS displays via the Ebus, there was ~2 amps drawing on the battery and a voltage of around 12.5. When I then switched the master on, the amp draw went to -9, and voltage dropped to 11.4. (The tail strobe does come on with the master, but is not more then 2 amps max)
Is it possible I have a master solenoid that's drawing inordinate current, thus explaining the low voltage alarms, even though the battery is 12.8 volts after landing?