background image

VT80BL Instruction Manual 

Page 15

JETS MUNT S.L

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
values 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.

VT80BL Trouble Shooting  

PROBLEMS 

SOLUTIONS

The engine loses power in 
flight 

1. The ECU battery is empty: 
recharge
2. The filters are dirty 

The engine stops in flight 

1. The fuel level is low and/or there
is air in the pipes
2. There is a poor connection 
between the battery and pump
3. Interference
4. Check the “last power down” 
cause on the ecu

There is excessive vibration
and unusual noise 

1. The engine is unbalanced by the
ingestion of a foreign object. Do not
use the engine and send it in for 
service. 

During startup the rotor spin 
at low speed and “Start Bad”
message is issued 

1. Incorrect oil used on last run.
2. Low battery voltage
3. starter clutch slipping 

PROBLEMS 

SOLUTIONS

There is no reading on the 
screen 

1. Disconnected receiver or the
ecu/receiver batteries are empty
2. The display is badly connected
3. Problem in the ecu or display

The kerosene does not ignite 

1.. Check fuel flow.
2. The battery is discharged
4. Glow voltage or pump power 
needs adjustment 

There is little increase of
RPM when the fuel ignites 

1. There is air in the line of fuel
2. The filters are blocked 

The engine reduces the 
power of it is stopped during
starting 

1. The ecu has detected 
temperatures over 800ºC due to 
too slow starting
2. There is low battery or air in the
tubes- Therefore let it cool and retry

Engine does not accelerate 
to maximum set rpm 

1. There is insufficient fuel flow or 
air bubble entering the engine during 
the initial start up. 

Содержание VT80BL

Страница 1: ...age 1 Specifications Nominal thrust 80N at 150 000 RPM Idle thrust 4 5N Idle RPM 45 000 Diameter 90 5mm 3 56 Engine weight 950g 2 1lb Installed weight 1 075g 2 37lb Fuel Kerosene 3 5 oil Fuel comsumpt...

Страница 2: ...Fuel system Page 8 Fuel lter Page 8 ECU Engine Control Unit Set Up Page 8 Aligning transmitter with ecu Page 10 Failsafe Page 11 Preparing the engine for running Page 11 Prevent ood engine Page 12 Fir...

Страница 3: ...358 Arenys de Munt Barcelona Spain Web site www jets munt com E mail info jets munt com Fax 34 93 7950113 Legal and Disclaimer The engine design and the contents of this manual are copyright by Jets M...

Страница 4: ...e di culty and specialist equipment Simply slackening the spinner nut of the rotor will immediately lose the delicate balance condition without which the engine may not run without damage to its rotat...

Страница 5: ...engine exhaust contains gases which can cause asphyxiation and nuisance smells 5 Do not touch the engine whilst it is running Turbines rotate at a very high rpm and the engine casing and exhaust can r...

Страница 6: ...rom the engine intake so there is no possibility of accidental ingestion of the wire 3 Fuel pipe should be routed similarly clear of the intake 4 The fuel pump should be preferably mounted with the sp...

Страница 7: ...can be pulled out of the plane and without connecting to the ecu just using an 5 10V battery the data stored can be played back in real time same presentation as if the engine was running Playback mod...

Страница 8: ...he ecu so that some fuel clean all the possible dirt particles that could have entered in the system during installation ECU Engine Control Unit Set Up The ECU supplied is supplied programmed for the...

Страница 9: ...VT80BL Instruction Manual Page 9 JETS MUNT S L Engine installation Electrical connections Engine installation Fuel system...

Страница 10: ...lay will now change to 6 Leaving the throttle stick in the minimum position raise the throttle trim to the full up position or switch Engine Cut switch to o and again press the button to store the val...

Страница 11: ...should not be required and can only be carried out by Jets Munt SL or your authorized dealer Preparing the engine for running A suitable platform table workbench is now required to clamp the test sta...

Страница 12: ...rted start the start up sequence is aborted by the user or automatically before the engine arrive to idle This can cause that the kerosene inside the engine keep burning for long time and could destro...

Страница 13: ...ized in pulsating mode Few seconds later the kerosene will ignite and the exhaust temperature will begin to increase The rpm and pump power will increase automatically During this phase the data termi...

Страница 14: ...sing the starter for long time can destroy the starter motor List of ECU message codes Here is a list of possible messages shown on the data terminal screen and their meaning TrimLow Indicates that th...

Страница 15: ...efective RPM sensor RCPwFail Lack of power from the radio receiver VT80BL Trouble Shooting PROBLEMS SOLUTIONS The engine loses power in ight 1 The ECU battery is empty recharge 2 The lters are dirty T...

Страница 16: ...ngine Use a appropriate adapter for the 6mm tube output of the UAT to the 4mm in the inlet side of the fuel pump direction of fuel ow is clearly shown at the top of the pump The clear 4mm tubing is us...

Страница 17: ...e 2T oil The engine can use 2T oil but the di erent oil brands use di erent contents of additives to protect the mechanical parts from rust during inactivity periods This is good for engine protection...

Страница 18: ...e 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 failur...

Страница 19: ...l system is kept free from dust and dirt inclusion and that fuel is carefully ltered Running Time Counters Using the second left hand button scroll through the menu s to the INFO menu This screen cont...

Страница 20: ...he normal procedure Trim up cycle stick The time to shut down and later start is exactly the same as standard operation This mode is useful for gliders where the engine is used to climb to height shut...

Страница 21: ...Start option in the ECU Menu Do this during a normal ight at a high altitude and throttle down to idle then begin a 15sec count down From this try to gauge if the aircraft can maintain ight during th...

Страница 22: ...ve a plane in particular circumstances but it can do much more harm than good A belly landing or landing gear damage due to a ameout induced heavy landing is more favorable than a similar landing arri...

Страница 23: ...een Button Radio Check to go to Radio Screen Button Last Shutdown to go to Last Shutdown Screen Button File to go to File Screen Only visible if uSD inserted before turn on Button Back to go initial s...

Отзывы: