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.
●
FailSafe: The engine has been shut down because of loss of the control signal from the
transmitter. After 0,5s of detecting a loss or invalid RC signal, the ecu sets engine
power to idle, and if after another 1,5seconds a valid signal is still not received the
engine is shut down.
●
LowRPM: The engine has been shut down because the RPM has dropped below a
minimum. Cause could be lack of fuel, air bubbles, problem with the batteries, or
defective RPM sensor.
●
RCPwFail: Lack of power from the radio receiver.
Fuel System
Always use appropriate containers to store fuel. It is advisable to install an anti bubble system
to the fuel supply circuit. The simplest one is a felt filter clunk installed into the fuel tank. This
helps maintain consistent fuel flow and greatly reduces the possibility of air getting into the
suction side of the pump circuit, which could cause stoppages.
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Summary of Contents for Merlin M166TS
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