Merlin
Instruction manual V1.4
Pag:
18
List of ECU message codes
Here is a list of possible messages shown on the data terminal screen and their meaning.
TrimLow
:
Indicates that the signal received from the transmitter corresponds to the lowered
trim, that is to say, engine OFF.
Ready
:
Indicates that the engine is ready for starting, and that the transmitter signal
corresponds to IDLE, (LED lit twice)
StickLo!:
This indicates that the throttle stick is in a position above IDLE, the engine will not
start with the stick in this position.
Glow Test:
Verification of glow plug
StartOn:
Test of the starter and rpm sensor
Ignition:
Ignition phase.
SwitchOver:
Phase of heating of the combustion chamber after detecting the ignition.
FuelRamp:
Phase of acceleration until idle speed.
Run Idle:
Engine working correctly, pilot have full control of engine power, command received
from transmitter is IDLE.
Running:
Engine working correctly, pilot have full control of engine power, command received is
an intermediate setting between Idle and Full Power.
Run-Max:
Engine working correctly, pilot have full control of engine power, command received
is Full Power
Stop:
Engine off.
Cooling:
Starter is operating to cool the engine.
GlowBad:
Defective or disconnected glow plug.
StartBad:
Defective starter, insufficient RPM reached during start, RPM sensor damaged, too
thick oil used on previous run, no cooling sequence done in previous run.
Low RPM:
Engine had been shutdown because the speed has fallen below the minimum.
Usually lack of fuel (bubble)
HighTemp:
Excessive temperature
Battery!:
battery voltage out of limits.
No Engine data
:
Data bus disconnected from the engine.
Pump Overload
:
There is a restriction in the fuel pathe from the pump to the engine, or in the
engine itself.
Diagnoses:
During engine operation the Ecu measures and stores all the engine operating parameters
recorded during the last the 51 minutes of operation. These measures can be downloaded later
to a PC to study the behavior of the engine in flight and to diagnose any possible problems.
Also, after each cycle of operation, the Ecu stores the last cause of shut down and the values of
RPM, temperature and pump power. In order to access these measures, it is necessary to shut
down and power-up the Ecu. Set the trim down (trimLow) and push the left button on the
display. The Ecu will show the cause of last shutdown and the parameters value at the moment
of shut down. These are as follows:
Diagnosis messages:
UserOff:
The engine has been shut down because it has received the shut down command from
the transmitter.
