SDS CPi-2 Manual Download Page 1

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SDS CPi-2

IGNITION

Coil pack ignition for non-certified aircraft engines with automatic battery backup.

Software version 1.6 Apr 20, 2020

Panel mountable Programmer & Display Single board CPi-2 ecu

Dual board CPi-2 ecu

4 cylinder Coil pack 6 cylinder Coil pack

Summary of Contents for CPi-2

Page 1: ...k ignition for non certified aircraft engines with automatic battery backup Software version 1 6 Apr 20 2020 Panel mountable Programmer Display Single board CPi 2 ecu Dual board CPi 2 ecu 4 cylinder C...

Page 2: ...ion the same at all times and if one board fails or loses power the other board should keep the engine running The programmer display and keypad unit can access each board in the dual board system by...

Page 3: ...Mount this in a visible area on the panel Its is important to be able to view the programmer in the event that there is a problem in the system The LCD display is rated as sunlight readable but it wo...

Page 4: ...x 2 5A for purple wires 2 x 10 15A for the Red High current wires It is important to switch both purple and red wire for proper operation and to also keep the backup battery from slowly draining curre...

Page 5: ...un using magnetos or other ignition Disconnect the old magneto kill wire off the keyswitch L and connect the CPi2 gray wire to L Single board running two coilpacks Insert the Gray in the lower right c...

Page 6: ...an the CPi2 then you should connect the battery minus to your grounding bus or chassis ground If the battery is only being used for the CPi2 there is no need to chassis ground the battery as it will g...

Page 7: ...exhaust heat also Hall sensor cable s and ecu connector From engine bay route through the firewall to the gold CPi2 ecu Do not route hall sensor cable alongside spark plug wires Keep away from spark...

Page 8: ...o the lid A fault in the backup will be relayed via the Primary In the event the Primary board is dead there will be no audio warning You could connect the Backup to your audio system if you still hav...

Page 9: ...ading extra high RPM s Battery Charge Enables or Disables Trickle charge on the Backup Battery With our recommended backup battery this option should be set to enabled With other batteries it could be...

Page 10: ...fold pressure with SDS supplied coilpacks higher Coiltime may be needed to fire the spark try in the 4 4 5mS range Coil Test This screen turns on coil test by pressing 1 turns off with 1 Remove all sp...

Page 11: ...the backup boards settings to view BC voltage If CS is reading zero then there is no power source to the CPi2 units coil power section and there will be no spark Check wiring to the CPi2 check the CPI...

Page 12: ...DV LOAD settings many times When set to NO this will speed up access to RET ADV LOAD Values Lock Extra protection against another person unknowingly pushing buttons on the system Press the plus key to...

Page 13: ...ded because COIL B will keep running on if the system is switched onto the Backup Battery Extra advance can help with engine power when on a single spark plug On Back Batt Coil B OFF or ON Only useful...

Page 14: ...engine as high as possible when doing this test Ignition Off Engine shut down Works in conjunction with another screen called IGNITION OFF SETUP If there is no engine shut off switch wired to the CPi2...

Page 15: ...een to be in when flying the airplane since you can see the most important information also other important screens nearby can be accessed with a few presses of the left or right arrow keys If you are...

Page 16: ...ual board only CPU boards not communicating one may have no power Fuse1 or Fuse2 Problem with 10amp Coil fuses for coilpack power Check fuses on side of gold ecu Map Map sensor hit high or low voltage...

Page 17: ...to prevent detonation left photo above ADVance adds to your timing usually at lower MAP to help fuel economy right photo above ADVance will be added to RPM IGN RETard will get subtracted from RPM IGN...

Page 18: ...or best alignment to the magnets Alignment Steps for slotted type sensor 1 Best to rotate the crankshaft so that a trigger magnet is closest to the sensor 2 Have the mounting bolts loosened slightly a...

Page 19: ...may be best to disable fueling to the engine and crank the engine while watching a timing light to see if the timing is approximately correct Somewhere between 15 degrees BTDC to 0 degrees or even if...

Page 20: ...20 Magnet Position value will end up to be different from the primary board due to dual hall sensor used on the dual board unit...

Page 21: ...its accessing the B ecu board When programming timing on the Dual board CPi2 you need to have all the timing values equal in both the A and B boards The same goes for most other settings For the most...

Page 22: ...ith good Mainbus voltage and good backup battery voltage MAIN LED lit Batt LED not lit Mainbus voltage is low but not low enough for the CPi2 to switch over to backup battery power Fault LED is lit in...

Page 23: ...e the charge feature on the CPi 2 this is discussed earlier in the manual in the Batt Charge section Having two different systems charging the battery could be bad for the battery and may also confuse...

Page 24: ...programmer keypad display unit Cpu programmer current draw is 22A with the engine not running Allow for an extra 15A draw to supply trickle charge current to the Backup Battery Above test was done wi...

Page 25: ...gine Once timing is verified you can program specific timing values for your engine Scroll with the left or right arrows until you find RPM IGNITION and use plus and minus keys to change the timing in...

Page 26: ...gher than 1000 ohms and the plug wire should be replaced or both crimp terminals re crimped or replaced Usually a bad wire will still give a reading but if resistance is too high it would be risky to...

Page 27: ...27 6 cylinder schematic drawing of hall sensor installation 8 cylinder schematic drawing of hall sensor installation Schematic top view of hall sensor pulley and bracket...

Page 28: ...where hall sensor connectors plug into the ecu Green should be closest to the ecu lid red closest to mounting flange Did someone unplug wiring and plug it back into the cpi2 with hall sensor plugs sw...

Page 29: ...e copper conductor Higher than 1000 ohms and the plug wire should be replaced or both crimp terminals re crimped or replaced A bad plug wire will have much higher resistance than a good plug wire and...

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