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Ingenieurbüro CAT, M. Zipperer GmbH +49-7634-5056-800
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www.jetcat.de
GERMANY
Instruction manual JetCat-PRO engines, 1.7 - V12.01V
wheels left the ground, spray the tires
with an anti-static spray available from
electronic or hardware supply stores.
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.