SPECIAL FEATURES
REPAIR PROCEDURES / LIMITED WARRANTY
TROUBLESHOOTING GUIDE
MODE PROGRAMMING
Power Profiles: the SPX Zero is not designed as a „highpower“ stock speed-control but for true stock racing
withequalspeeds.Neverthelessit‘sversatileformanyracingclasses,motorsandpersonaldriverpreferences!
Dependingonthestatusofthecar(start,acceleration,fullspeed)thesoftwarecalculatestheperfectmotormanagement.
Higher profiles mean more overall power and aggressive response.
Profiles 1-3aremeantformildmodifiedmotorsand4+5aremildstockprofiles, asknownfromprovenSphere
Competition speed-control. These relate as following
SPX
Zero
Sphere
Competition
Remark
#0 -- „Boost 0“ profile for true stock racing with disabled timing
#1 #1 mildprofile,greatcontrolforOffRoadorOnRoadModified
#2 #2 mildprofile,greatcontrolforOffRoadorOnRoadModifieds
#3 #3 mildprofile,greatcontrolforOffRoadorOnRoadModifieds
#4 #6 stock profile (1st generation style!)
#5 #8 stock profile (1st generation style!)
The great„Boost 0“ mode,for truestockracingwith equal power can easilyberecognisedwhentheredLED
flashes in neutral position in normal operation to indicate that entire timing advancement is disabled!
AutoCell System:LRP’sexclusiveandsmartAutoCellSystemensuresthatLiPobatteriescanbeusedsafely
without accidentially deep-discharging of the cells. The motor function will be shut-off and the SET LED will flash
if the system recognises very low battery voltage.
Internal-Temp-Check System: the SPX Zeroallowsyoutoread-outthemaximuminternaltemperaturethat
thespeedoreached.Tostoreittothememory,brieflyapplybrakesaftertherunbeforeyouturntheswitchoff.You
canconvienentlyread-outthetemperaturebackinthepitssinceitremainsstoreduntilyouturnitonthenexttime
regularly (which will reset the memory). This new feature allows you to accurately check if all is running well or if
you‘reclosetoshutdownalready.
How to read-out the temperature:
Switch at „OFF“ position.
Keep MODE button pressed while you turn switch to „ON“ (then release button)
SETLEDwillstarttoflashred(MODELEDisoff),nowcountthenumberofflashes.
Basics:
•Thermalshutdownofthespeedowouldoccurat5flashes.
•Thehigherthenumberofflashes,thecoolerthespeedoran(e.g.thebetteritis!)
•Everyflashequalsto~8°Ctemperaturedecrease
Example:
you count 10 flashes after the run
10 - 5 = 5 (e.g. 5 flashes „away“ from shutdown)
5x8°C=40°C(e.g.youare40°Cawayfromthermalshutdownandthereforesafe!)
Brake: superlinear feeling with a strong pushbrake and 6 fine steps for almost infinite adjustments of autobrake!
Team advise: Agoodstartingpointforthebrakesettingonyourradiois80%forallclasses.Makesureyoudothe
radio-setupwithallsettingsontheradioon100%!
Changing Mode settings without the transmitter: At race events you usually do not have access to your
transmitter,butnevermindsinceyoucansimplydisconnectthereceiverleadfromthereceiverandchangethe
MODE settings as described at „Mode Programming“.
Works-Default-Settings: All LRP speed-controls come factory-adjusted (defaults are grey-shaded above).
Ifyouloosetrackofthe modes,you canrestoretheworks default settings.With thetransmitterswitchedon,
hold the SET button pressed while you switch on the speed-control. This returns the unit to the LRP works default
settings.
Pure Brushless Forward/Brake Design: uncompromising and outstanding performance for top level com-
petition was the target for the SPX Zero! Therefore the LRP engineering team developed a pure forward/brake
brushless speed-control. There is no reverse function and no brushed operation.
Power Capacitor: Neverrunwithoutapower-capacitor!Itoffersincreasedpunchandadditionalprotection,
Multi-Protection System: The perfectprotectionagainstshort-circuits (motor), overload andoverheating.
Ifyourspeed-controlfacesoverload,themotorfunctionwillbeshut-offforprotectionandtheSETLEDwillflash,
althoughthesteeringfunctionismaintained.Letthespeed-controlcooldownforafewminutes.Ifyouexperience
frequentshutdowns,checkforthefollowing:
•Correctgearratio(refertomotormanualforgearingrecommendations)
•Powerprofilesettingtoohigh(highervaluewillheatupmotorandspeed-controlexcessively)
•Motoristoostrongormotorisdamaged.
SYMPTOM CAUSE REMEDY
Servoisworking,nomotor
function Speedo plugged in incorrectly Plug speedo to receiver as Ch.2
Wiring problem Check wires and connectors
Sensor wire missing/defective Install/replacesensorwire
Motor defective Replace motor
Speedo defective Send in product for repair
No servo and no motor
function Speedo connected to receiver with wrong polarity Connect speedo with correct polarity
Wiring problem Check wires and connectors
Battery defective Replace with different battery pack
Crystal,receiverortransmitterdefective Replace components one by one
Speedo defective Send in product for repair
Motor stutters while
accelerating Sensor wire defective Replace sensor wire
Motor or sensor board in motor defective Replace sensor board or motor
Radio interference Change location of components
Power capacitor damaged Replace power capacitor
Speedo defective Send in product for repair
Motor runs in reverse when
accelerating forward on radio
Modelwithreversedgearbox! Can not use a sensored brushless system!
Insufficientperformance.
E.g.poorpower,topspeed
or brake
Wrong Gear ratio Adjust gear ratio
Transmitter settings changed after set-up Repeat set-up procedure
Power Capacitor damaged Replace Power Capacitor
Motor or sensor-board in motor defective Replace sensor-board or motor
Speed-control defective Send in product for repair
Speed-control switches off
frequently Wrong setting in ACS (Mode.1)! Change value of ACS (Mode.1) accordingly
Model used too often without cool-down periods Let cool down after every run
Motor stronger than motorlimit or input voltage
too high Use only motors and batteries which are within
the specifications of the speed-control
Stuck drivetrain or ball-bearing Maintain model
Motor defective Replace motor
Motorneverstops,runsat
constant slow speed Transmitter settings changed after set-up Repeat set-up procedure
Humidity/water in speedo Immediatelyunpluganddryspeedo
Motor or sensor board in motor defective Replace sensor board or motor
Radio interference Receiverorantennatooclosetopowerwires,
motor,batteryorspeedo.Receiveraerialtooshort
or coiled up
See„InstallationTips“and„Installation“
Receiverdefective,toosensitive;
Transmitterdefective,transmitteroutputpower
toolow,servoproblem
Replace components one by one
Only use original manufacturers crystals
Poor battery connection Check plugs and connecting wires
Transmitter batteries empty Replace / recharge transmitter batteries
All products from LRP electronic GmbH (hereinafter called “LRP”) are manufactured according to the highest quality
standards.LRPguaranteesthisproducttobefreefromdefectsinmaterialsorworkmanshipfor90days(non-european
countrisonly)fromtheoriginaldateofpurchaseverifiedbysalesreceipt.Thislimitedwarrantydoesn’tcoverdefects,
whicharearesultofmisuse,impropermaintenance,outsideinterferenceormechanicaldamage.
„Thisappliesamongotherthingson:
• Cutofforiginalpowerplugornotusingreversepolarityprotectedplugs
• Receiverwireand/orswitchwiredamaged
• Mechanicaldamageofthecase
• Humidity/Waterinsidethespeedcontrol
• Mechanicaldamageofelectronicalcomponents/PCB
• SolderedonthePCB(exceptonsolderpads)
• Connectedspeed-controlwithreversedpolarity“
Toeliminateallotherpossibilitiesorimproperhandling,firstcheckallothercomponentsinyourmodelandthetrouble
shootingguide,ifavailable,beforeyousendinthisproductforrepair.Ifproductsaresentinforrepair,whichdooperate
perfectly,wehavetochargeaservicefeeaccordingtoourpricelist.
Withsendinginthisproduct,thecustomerhastoadviseLRPiftheproductshouldberepairedineithercase.Ifthere
isneitherawarrantynorguaranteeclaim,theinspectionoftheproductandtherepairs,ifnecessary,ineithercase
Toeliminate allotherpossibilitiesorimproperhandling,firstcheckallothercomponents in yourmodel andthe
troubleshootingguidebeforeyousendinthisproductforrepair.Ifproductsaresentinforrepair,whichdooperate
perfectly,wehavetochargeaservicefeeaccordingtoourpricelist.
The SPX Zero features4 modeswhichenableyouto adjust it100% to YOUR special requirements.Thefactory
settings are shown in grey colour.
MODE.1 (AutoCell System): werecommendusingvalue2forracingpurposes withcellsother then2S/7.4V
LiPo,whichdisablesthecut-offfunctioncompletely.
MODE LED #1 #2
Green LiPo/NiMH
Automatic
Disable
Cut-Off
Caution:themostcommonreasonfor„unexpected“shutdownisusingthewrongvalueinthismode!
MODE.2 (Power Profiles): this mode contains the new „Boost 0“ which is meant for true stock racing with
brushless motors and no added speed-control timing and which is indicated by the flashing red LED in normal
driving mode (when throttle is in neutral).
Additionally the SPX Zero incorporates further profiles so you can adjust the feel to your likes. Either you run On-
RoadorOffRoad,onslipperyorhigh-tractionsurfaces,wehaveincorporatedaprofileforyou!Highervaluemeans
more aggressive throttle response.
MODE.3 (Initial Brake): Allows you to set a certain level of „hand-brake-effect“.
MODE.4 (Automatic Brake): called auto- or drag-brake. This function allows you to set a slight braking action
which is applied in the neutral range.
• Howtogetinto„programmingthemodes“ Press MODE button for 3 or more seconds.
• Howtocheckthestoredvalues Count the number of flashes of the red SET-LED
(* = value 1 | ** = value 2 | etc.).
• Howtochangethevalue Press SET button to increase value by one step.
• HowtogettothenextMode Press MODE button once.
• Howtoleavetheprogrammingmode IfyouareinMODE.4,presstheMODEbuttononemore
time,whichwillalsostorethesettings!
Important:donotturntheswitchoffbeforeleavingMode4(byonemorepressofMODEbutton)asotherwiseyour
recentchangeswon‘tbestoredinthememoryoftheSPX Zero!
Tableofsettings,valuesandmodes:seebelow(grey-shadedvaluesshow„worksdefaultsettings“)
MODE LED #0 #1 #2 #3 #4 #5
Green/Red
(same time) disabled Going from lowest to highest automatic brake setting
(value1=minimum/value5=maximum)
MODE LED #0 #1 #2 #3 #4 #5
Red Boost 0
Mode Going from mild to powerful profile
(value1=minimum/value5=maximum)
willbechargedwithafeeatthecustomersexpenseaccordingtoourpricelist.Aproofofpurchaseincludingdateof
purchaseneedstobeincluded.Otherwise,nowarrantycanbegranted.Forquickrepair-andreturnservice,addyour
address and detailed description of the malfunction.
IfLRPnolongermanufacturesareturneddefectiveproductandweareunabletoserviceit,weshallprovideyouwith
a product that has at least the same value from one of the successor series.
Thespecificationslikeweight,sizeandothersshouldbeseenasguidevalues.Duetoongoingtechnicalimprovements,
whicharedoneintheinterestoftheproduct,LRPdoesnottakeanyresponsibilityfortheaccuracyofthesespecs.
LRP-Distributor-Service:
• Packageyourproductcarefullyandincludesalesreceiptanddetaileddescriptionofmalfunction.
• SendparceltoyournationalLRPdistributor.
• Distributorrepairsorexchangestheproduct.
• ShipmentbacktoyouusuallybyCOD(cashondelivery),butthisissubjecttoyournationalLRPdistributor‘sgeneral
policy.
MODE LED #0 #1 #2 #3 #4 #5
Green/Red
(alternate) disabled Going from lowest to highest automatic brake setting
(value1=minimum/value5=maximum)
