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.
