![background image](http://html.mh-extra.com/html/jetcat/p100-rx/p100-rx_manual_646130034.webp)
PAGE 34 of 54
Reason for an unexpected Shut-Down
There are three ways to diagnose why the engine flamed out.
1.
In the info menu the "LAST OFF-COND" variable will tell you why. For example, low RPM, high
temp, fail-safe etc.
This parameter is non-volatile and will be available until the engine is run
again.
2.
You can view the last 8 seconds of the flight before it shut-down. This data is updated every 0.2
seconds. This allows you to see the trend leading up to the shut-down. This mode is entered by
pressing the "+" key of the GSU while powering up the ECU. You can scroll through the data
using the (+ or -) keys and scroll forward and backward through time using the (info or min/max)
keys.
This parameter is non-volatile and will be available until the engine is run again.
3. You can download and view the entire flight using the optional serial adapter Part# A1028-USB
and a PC.
If the off condition is "POWER-FAIL" then the data is not valid. This occurs if the ECU or receiver battery
was disconnected or was intermittent or if the receiver power goes lower than 3 volts. In this case, the data
in the system would be for the previous run.
Sample of displayed values
Tim:
Time
-4.0
R:
RPM
0
S:
Set-
RPM
0
EGT:
Temp
0
Pmp:
Pump
V
0.0
Sta:
State
0
Th:
Thr.
pulse
0
Au:
Aux.
pulse
0
Bat:
Batt
volts
0
AirS:
Air
Speed
0
SetS:
Set
Air speed
0
See the
Explanation for Turbine Shut Down
for a description of each state code.
How to diagnose a shut-down from the saved data
Symptom
Engine shut-
off state
Possible Reason
Engine quits with
a trail of white
smoke.
Low RPM or Fuel
Fail
This is normally caused by air in the fuel system. Make sure
there is no leaks in the fuel system and most importantly, get
all the air out of the fuel filter. The fuel filter should not be hard
fixed to the plane but allowed to hang free. It is best mounted
vertically. When you purge the fuel system, tap the filters while
the pump is running to get all the air out them.
USE A BVM Ultimate Air Trap!
If the engine fails to ignite, you
CAN
get excess kerosene in the engine.
YOU CANNOT
REMOVE EXCESS KEROSENE BY TILTING THE PLANE WITH THE NOSE UP IN THE
AIR
. The kerosene will be captured by the exhaust guide vanes and will not run out of the
engine. The nose must be tilted down towards the ground. The excess kerosene will then
run out the intake. You may need a towel around the intake to absorb the kerosene. Clean
off the starter o-ring afterwards since it may get kerosene on it as well.