Merlin
Instruction manual V1.4
Pag:
21
Extra ECU functions.
The ecu provides several menus that allow doing some tests and personalizing some settings,
like:
-Adjust the thrust/throttle curve (Linear, Expo and Intermediate)
-Test the starter, Glow Plug, valves and Pump.
-Check the failsafe counter (time and pulses of wrong RC signal)
-Reduce the maximum power
-Increase the Idle Rpm.
-Adjust the glow plug voltage. The engine come from factory with this voltage adjusted
for reliable starts and long life of the glow plug element. Increasing the voltage beyond the
necessary will cause the failure or shortening of the life of the element.
Do not change the
voltage, please contact to Jets Munt first
.
-Adjust the pump power at startup. The fuel flow during ignition phase must be finely
tuned for each engine/pump combination, and this is done at factory during test. In the case that
after some run time the pump become loose and the starts become too aggressive, reduce the
value by 25 rpm at time until normal starts are reached again. Usual values are 75 … 125 rpm.
Do not use more than 150RPM.
-Acceleration and deceleration time: Set to “normal”, but is possible to change to faster
or slower upon particular needs (see troubleshooting section). The use of Diesel fuel is allowed,
but the acceleration should be set to “slow” due to the slower burning characteristics of the
diesel fuel.
Telemetry:
Currently the Jetsmunt engines can be connected to telemetry capable radios from
Futaba, Multiplex, Jeti, JR, Spektrum and Graupner Hott trough a telemetry adapter. More
information at www.xicoy.com
Engine Kill Switch
It is good practice, and in some countries mandatory, to have an
alternative means of shutting off the engine in emergencies
independent of the ecu. A simple method to achieve this is by
putting a switch in the battery line to the ECU, operated by a
mini servo mounted to a ply plate. The plate is drilled for a
miniature toggle switch actuated by the servo arm – position it
so it can only be reset by hand. The switch is wired in series
with the positive (red) battery wire to the ECU. The servo should be connected to a channel
which is operated by a switch on your transmitter so it can be operated quickly. The servo travel
should be adjusted to ensure it is not stalled at either position.
