JetCat P300-PRO User Manual

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05/2019

Operating instructions

JetCat PRO Engines

Table of Contents

Default Chapter2
- Table of Contents2
Introduction4
Features5
Safety, Meaning of Symbols7
Safety Precautions7
- Hazard Areas9
  - Hazard Areas on Engine Startup and Idle Operation9
  - Hazard Areas on Engine Idle +20% to Full Power Operation10
Mounting / Fixing of the Engine11
Connections on the Engine, Overview12
- Data Connector (A)13
- Power Connector (B)15
- Power Supply15
- Expansion Connector (C)16
- Fuel Connector Port17
  - Fuel17
  - Fuel Connection Diagram, Standard17
- Bleed Air Port (Optional) ; Pressurization of Fuel Tank18
  - Fuel Connection Diagram, Pressurized Fuel Tank18
Jetcat Pro-Interface19
- Connection Overview, PRO-Interface20
- System Connection Diagram with Pro-Interface23
  - Connection Diagram A); Direct Battery Connection23
  - Connection Diagram B); Battery Connection Via PRO-Interface24
Ground Support Unit (Gsu)25
- Connection of Gsu25
  - A) GSU Connects to Engine Sided 4-Pin Molex Connector25
  - B) GSU Connects to the Jetcat PRO-Interface25
- Gsu Control Panel Descriptions26
  - GSU Button Descriptions27
  - Description of Leds on the GSU27
Operation Modes28
- Industrial Operation Mode, Normal Altitude28
- Ndustrial Operation Mode Igh Altitude Without Altitude Controlled Low Rpm Governing28
- Ndustrial Operation Mode Igh Altitude with Altitude Controlled Low Rpm Governing28
- Operation Mode for Propulsion of RC-Models28
- Setup/Adjustment of the Operation Mode28
Engine Power On/Off29
- Power on Via RC-Signal from Receiver29
Engine Control30
- Control Options30
- Control Via Serial Bus (Com1)39
- Control Via Can-Bus39
Preparing Fuel and Fuel System39
- Prime the Pump and System40
Running the Engine for the First Time41
- Initial Adjustments41
- The Checklist41
Gsu (Run Menu Default) Display Symbols43
- Initial Default Display Screen after Power up43
- Fter Power up Error Condition Display Screen43
- Engine Starting Display Screen44
- Engine Running Display Screen44
Engine Running States45
- Explanation of the Engine States45
Troubleshooting48
- Most Frequent Errors48
  - Ost Frequent Errors Ause and Remedy48
- Reason for an Unexpected Shut-Down49
Manual Advanced Section50
- Smoker Pump50
Menu Structure51
- Menu Selections51
  - Selecting a Menu51
  - Change Values / Items51
- The Run Menu52
- The Min/Max Menu52
- The R/C Check Menu53
- The Info Menu54
- The Statistic-Menu55
- The Limits Menu56
Special Functions64
- Temperature Calibration64
- Reset to Default Values65
Firmware Update66
Jetcat Three Year Limited Warranty69

Questions and Answers:

J
Jessica TaylorAug 5, 2025
What to do if the JetCat Engine starting process fails?
- J
  Jenny HigginsAug 5, 2025
  If the JetCat Engine starting process fails, it could be due to several reasons. The turbine might still be too warm, so wait until the SlowDown sequence finishes and the green OK LED stops blinking. Alternatively, the battery could be low or have a faulty connection, so charge the battery and check the ECU's battery connection. A defective glow plug (indicated by a blinking red Pump running LED) would need replacement. Finally, ensure the three-conductor cable for the starter motor and glow plug is properly connected from the ECU to the engine.
J
Jacob McconnellAug 10, 2025
Why doesn't my JetCat Engine turbine ignite?
- S
  Stephen HouseAug 10, 2025
  If the JetCat Engine turbine doesn't ignite, the fuel supply lines may be empty or not purged, so purge the fuel system. Another possibility is a weak or empty ECU battery, so charge the ECU battery. If the kero start igniter has failed, call JetCat for information.
R
Rachel HowardAug 14, 2025
What to do if the JetCat Engine ignites, but the start process stops?
- A
  Anthony BishopAug 14, 2025
  If the JetCat Engine turbine ignites but the start process is discontinued, there may be air in the fuel feed lines. Examine all Festo fittings, nipples, clunk, and the filter. Another potential cause is the fuel pump not running. Test the pump in the Test Functions menu; the fuel pump must run as soon as the red Pump running LED illuminates.
N
Natalie RitterAug 18, 2025
How to fix ECU if it doesn't follow transmitter commands on my JetCat Engine?
- X
  xjonesAug 18, 2025
  If the JetCat Engine ECU doesn't follow full commands from the transmitter, the programming may be altered in the R/C throttle stick. Check alignment with the RC-Check menu and re-align the ECU to the R/C system.
F
Faith MillerAug 22, 2025
What causes a Watchdog Failure and how do I fix it on my JetCat Engine?
- S
  smithcharlesAug 22, 2025
  If the JetCat Engine turbine quits with a Watchdog Failure, reset the ECU. Also, do not mount the ECU directly to the fiberglass body of the plane; use a plywood mount with a layer of foam tape and Velcro between the body and the ECU.
S
smithshirleyAug 27, 2025
How to stop my JetCat Engine starter unit from slipping and making noise?
- A
  Abigail ShepherdAug 27, 2025
  If the JetCat Engine starter unit slips and makes noise, it's likely due to dust and oil sediment on the compressor nut and O-ring. Clean the O-ring and compressor nut periodically with a cotton swab and solvent.
B
bsmithAug 31, 2025
Why is my JetCat Engine EGT giving erratic readings?
- E
  elizabethandersonAug 31, 2025
  If the JetCat Engine EGT is giving erratic temperature or RPM readings, the transmitter antenna may be too close to the model. Keep the antenna away from the model, as this may cause false readings.

JetCat P300-PRO Specifications

General

Max Thrust	300 N
Maintenance Interval	25 hours
Type	Turbine
Fuel	Jet A-1
Start Method	Electric Starter
Lubrication	5% turbine oil in fuel

Summary

Safety, meaning of symbols

Safety Precautions

General safety warnings and precautions for operating the engine and model aircraft.

Hazard Areas

Hazard areas on engine startup and idle operation

Defines safety zones during engine startup and idle.

Hazard areas on engine idle +20% to full power operation

Defines safety zones during engine operation from idle to full power.

Ground Support Unit (GSU)

CONNECTION OF GSU:

Explains how to connect the GSU to the engine or PRO-Interface.

GSU Control Panel Descriptions

Description of LEDs on the GSU

Explains the meaning of the GSU indicator LEDs and their states.

Operation modes

Engine Power ON/OFF

Power on via RC-signal from receiver

Explains how to power on the engine system using an RC signal.

Engine control

Control via Servo-PWM Signals

Setup failsafe mode

Explains how to set up the failsafe mode for radio failure.

Teach the ECU to the R/C System

Verify failsafe programing

Preparing fuel and fuel system

Running the engine for the first time

Starting and stopping the engine

Engine Running States

Explanation of the engine States

Troubleshooting

Most frequent errors. Cause and remedy:

Lists common errors, their causes, and remedies for troubleshooting.

Reason for an unexpected Shut-Down

Explains how to diagnose reasons for engine shut-down.

Firmware Update

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