Van's Aircraft HB-YMT, Flight Manual

Page: 155 / 181

Airplane Flight Manual HB-YMT
01/00 Description of the Airplane and its Systems 7–51
or not attached
The battery contactor failure can only be cleared by fixing
the problem and turning the system off, then back on.
When the battery contactor is failed, the All Auto function,
which sets all of the devices to automatic, is disabled. Also
note that any hard-wired backup circuits that are on will
remain on during a battery contactor failure.
7.11.10.5 E-Bus Failure
The e-bus provides initial power for turn-on as well as
backup power to the Control Unit.
If the e-bus circuit fails, then:
- The VP-200 cannot be turned on at initial power-on.
- The VP-200 may shut off if running only on the e-bus when
the failure occurs.
- An alarm is generated if the VP-200 is running off main bus
power via the battery contactor.
Some possible reasons for an e-bus failure include a blown
fuse, shorted wire, or damaged wire or connector.
7.11.11 VP200 Emergency Functions
There are four Emergency situations for which the VP200
provides quick access to automatic switchings in the
electrical system.
To get to the Emergency menus, press the red Emergency
button on the VP200 Switch Panel (SP)