Bailey Moyes 912 Dragonfly Maintenance Manual Download

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12.

Updating the EIS Software

EIS Model 4000 instruments with software version 70 or greater (as shown in the software version
number on the label, or as might be displayed on the screen at power-up) include field re-
programmable memory that allows the instrument to have software updates loaded into it via its serial
port.

Software updates can be loaded in the EIS via its serial port from either a loader cable connected to a
personal computer, or via any version of the GRT Horizon or Sport EFIS. When loading EIS software
via the EFIS, a serial output to the EIS and from the EIS must be connected. Earlier versions of the EIS
did not allow for software updates to be loaded into them via the serial port, and thus did not have a
serial output connected to the EIS serial input. This connection must be made to allow loading
software updates into the EIS.

13.

Check Entries Message

The “Check Entries” message will be displayed immediately after power-up if the EIS determines that
any user entry (including all limits and all configuration data) was lost or is incomplete. When this
message is the EIS will force you to review all entries by taking you to the Set Limits and
Configuration Set pages. Carefully review and correct any entries as necessary.

Note:

This message will be generated if any user entry is changed, and the instrument is turned off

before returning to the normal display pages. This message then serves a reminder that you were in the
process of setting user entries when the instrument is last turned off.

If this message appears frequently, this is most likely due to the instrument getting poor quality
electrical power. This is most common if the instrument is on while engaging an electric starter, or if it
is turned on before the engine is started in airplanes without batteries, or when power or ground
connections are loose.

14.

Troubleshooting Common Problems

Instrument does not turn on.
Warning light is on steady.

Either the instrument is not receiving power, or the 12V or 4.8V output from
the instrument is shorted to ground. A simple test is to make a cable with only
power and ground wires, and power the instrument via this cable. (This test
cable available at no charge.)

Instrument does not turn on.
Warning light never comes on.

Open ground connection to instrument, or the voltage provided to the
instrument is too low (less than 9V).

One EGT or CHT is erratic.

One of the two wires is unconnected between the instrument and the probe.
Most commonly, a crimp connection on the quick disconnect on the probe, or
the cable it plugs into, is loose. A visual inspection will usually be enough to
find the problem. Another simple test is to use a continuity tester, and verify
each pin at the instrument end of the cable has good continuity to the engine
case, since each probe is grounded to the engine. The pins numbers are listed
on the wiring diagram in the back of this manual.

All EGT and CHT are erratic.

This is caused by an open ground connection to the case of the engine on
engines which do not include an electric starter.

Oil Pressure Reads 99 with
engine off.

Connection to oil pressure sensor is open circuit. A quick test is to touch the
oil pressure lead to ground. This should cause the oil pressure to read 0. If it
does, check connections and ground to oil pressure sensor (case must be
grounded.) If this test does not cause a 0 reading, check the connection
between this wire and the input to the instrument.

Oil or Coolant Temperature
shows 59 deg F all the time.

The connection to the oil or coolant temperature probe is open, or not
grounded. A quick test is to touch the coolant temperature sensor lead to