repAir proCedures / limited wArrAnty
All products from LRP electronic GmbH (hereinafter called “LRP”) are manufactured according to the highest
quality standards. LRP guarantees this product to be free from defects in materials or workmanship for 90
days (non-european countris only) from the original date of purchase verified by sales receipt. This limited
warranty doesn’t cover defects, which are a result of misuse, improper maintenance, outside interference or
mechanical damage.
„This applies among other things on:
• Cut off original power plug or not using reverse polarity protected plugs
• Receiver wire and/or switch wire damaged
• Mechanical damage of the case
• Humidity/Water inside the speed control
• Mechanical damage of electronical components/PCB
• Soldered on the PCB (except on external solder-tabs)
• Connected speed-control with reversed polarity“
To eliminate all other possibilities or improper handling, first check all other components in your model and the
trouble shooting guide, if available, before you send in this product for repair. If products are sent in for repair,
which do operate perfectly, we have to charge a service fee according to our pricelist.
With sending in this product, the customer has to advise LRP if the product should be repaired in either case. If
there is neither a warranty nor guarantee claim, the inspection of the product and the repairs, if necessary, in
either case will be charged with a fee at the customers expense according to our price list. A proof of purchase
including date of purchase needs to be included. Otherwise, no warranty can be granted. For quick repair- and
return service, add your address and detailed description of the malfunction.
If LRP no longer manufactures a returned defective product and we are unable to service it, we shall provide you
with a product that has at least the same value from one of the successor series.
The specifications like weight, size and others should be seen as guide values. Due to ongoing technical impro-
vements, which are done in the interest of the product, LRP does not take any responsibility for the accuracy
of these specs.
LRP-Distributor-Service:
• Package your product carefully and include sales receipt and detailed description of malfunction.
• Send parcel to your national LRP distributor.
• Distributor repairs or exchanges the product.
• Shipment back to you usually by COD (cash on delivery), but this is subject to your national LRP distributor‘s
general policy.
The crossed-out wheeled bin means that within the European Union the product must be
taken to seperate collection at the product end-of-life. Do not dispose of these products as
unsorted municipal waste.
8. speCiAl feAtures
EXPLANATION:
If no remark, cause can be either with brushless or brushed motor. If „BM“ is indicated, cause
only relating to brushed motor.
9. trouBleshooting guide
SYMPTOM
CAUSE
REMEDY
Servo is working, no motor function.
Speed-control plugged in incorrectly
Plug speed-control in Ch 2
Wiring problem
Check wires and plugs
Sensor Wire missing/defective
Install/replace sensor wire
Motor defective
Replace motor
BM
- Motor brushes stuck
Check that brushes are moving freely
Overload protection activated
Allow speed-control to cool down
Speed-control defective
Send in product for repair
No servo and no motor function.
Speedo connected to receiver with wrong polarity
Connect speedo with correct polarity
Battery defective
Replace with different battery pack
Crystal defective
Replace components one by one.
Receiver defective
Transmitter defective
Speed-control 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
Power Capacitor damaged
replace Power Capacitor
Speed-control defective
Send in product for repair
Motor runs in reverse when accele-
rating forward on the transmitter.
Vehicle has reversed gearbox
Change motor rotating direction in Mode.2
BM
- Motor connected incorrectly
Connect motor correctly
Insufficient performance.
E.g. poor brake power, topspeed or
acceleration..
Motor pinion too big or gear ratio too long.
Use smaller motor pinion/shorter gear ratio
Transmitter settings changed after set-up
Repeat set-up procedure
Power Capacitor damaged
Replace Power Capacitor
BM
- Motor worn out
Maintain motor
Motor defective
Replace motor
Speed-control defective.
Send in product for repair
Speed-control overheats or
switches off frequently.
Motor stronger than motorlimit or input voltage
too high
Use only motors and batteries which are within
the specifications of the speed-control
Motor pinion too big or gear ratio too long.
Use smaller motor pinion/shorter gear ratio
Drive train or bearing problems.
Check or replace components.
Model used too often without cool-down periods
Let speed-control cool down after every run
Motor never stops, runs at constant
slow speed
Transmitter settings changed after set-up
Repeat set-up procedure
Humidity/water in speed-control
Immediately unplug and dry speed-control
Motor or Sensor Board in motor defective
Replace sensor board or motor
Radio interference
BM
- Motor suppressors not sufficient
Solder capacitors to motor
Receiver or antenna too close to power wires,
motor, battery or speed-control.
Receiver aerial too short or coiled up
See „Installation Tips“ and „Installation“
Receiver defective, too sensitive;
Transmitter defective, transmitter output power
too low, servo problem
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
Transmitter antenna too short
Pull out antenna to full length
All modes are available for brushless and brushed motors (speedo adapts automatically). The
LRP Crawler
Reverse
features 4 modes which enable you to adjust it to YOUR special requirements. The factory settings
are shown in grey colour.
MODE.1 (AutoCell System):
MODE LED
#1
#2
Green
LiPo/NiMH
Automatic
4-6cells NiMH
(LiPo Cut-Off disabled)
MODE.2 (Drive Selection & Motor Rotation):
the
LRP Crawler Reverse
allows you to select from two
different drive modes (with or without manual brake) in both motor rotation directions.
MODE.3 (Throttle Profiles):
allows you to perfectly adjust the
LRP Crawler Reverse
to your likes. All
profiles apply for forward and reverse direction.
MODE.4 (Auto-/Hill-Brake):
allows you to set the amount of braking action which is applied in the neu-
tral range of the throttle position.
6. mode progrAmming
• How to get into „programming the modes“
Press MODE button for 3 or more seconds.
• How to check the stored values
Count the number of flashes of the red SET-LED
(* = value 1 | ** = value 2 | etc.).
• How to change the value
Press SET button to increase value by one step.
• How to get to the next Mode
Press MODE button once.
• How to leave the programming mode
If you are in MODE.4, press the MODE button
one more time, which will also store the settings!
• Table of settings, values and modes: see below (grey-shaded values show „works default settings“).
MODE LED
#0
#1
#2
#3
#4
#5
#6
#7
#8
#9
#10
Green/Red
(same time)
none
Going from lowest to highest automatic brake setting
(value 1 = minimum / value 10 = maximum)
MODE LED
#1
#2
#3
#4
Green/Red
(alternate)
Expo Curve
Super Smooth Ramp
Expo Curve
Smooth Ramp
Expo Curve
No ramp
Linear
MODE LED
#1
#2
#3
#4
Red
Fwd/Rvs (no Brake)
Forward/Brake/Reverse
Fwd/Rvs (no Brake)
CW Motor Rotation
Forward/Brake/Reverse
CW Motor Rotation
AutoCell System:
Ready for the next battery technology – LiPo batteries! LRP’s exclusive and smart Au-
toCell System ensures that LiPo batteries can be used safely 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.
Drive Selection & Motor Rotation:
this versatile function allows you to adjust your
LRP Crawler Reverse
to all crawler-applications and -models.
You can choose from from two different drive modes (with or without manual brake) and also reverse motor
rotation direction for vehicles with counter-rotating gearboxes or opposed transmission.
Throttle Profiles:
finest throttle control at low rpm was the aim and the LRP engineering team definitely
succeded! The
LRP Crawler Reverse
allows fine adjustments of the the throttle curve with it‘s four individual
„Crawler Special“ maps to your special requirement.
Auto-/Hill-Brake:
the
LRP Crawler Reverse‘s
high brake levels allow you to adjust the „drag“ of your vehicle
perfectly to your application or crawler terrain. Higher settings mean higher amount of braking, up to „wheel
locking“ brake action demanded by many crawler specialists!
Manual Brake:
as a first for Crawler speedos, the
LRP Crawler Reverse
includes a mode with optional manual
brake, which can be used in addition to the Auto-/Hill-Brake and gives you more tuning options to adjust your
vehicle to the special crawler circumstances.
The brake is applied evenly in both directions, no matter if you come from „forward to reverse“ or from „re-
verse to forward“ direction for maximum control on steep ramps. „Double Action“ on throttle is required to
change from „brake to reverse“ mode, e.g. you have to return to neutral briefly to change function from brake
to reverse.
Note:
this brake function is available in Mode.2 profiles #2 and #4. When selecting #1 or #3 you will have no
manual brake. This special „manual brake“ function will require slightly different driving style and you should
practice with this function to fully benefit from it and to see if you like it or not.
5A BEC:
the
LRP Crawler Reverse‘s
super-strong 6.0V/5.0A BEC will power all your strong digital servos or
even multi-servo vehicles with pleasure!
Automatic Brushless / Brushed Adaption:
detects the connected motor type during turn-on/initialisa-
tion and adjusts the correct brushless or brushed operation automatically. No adjustments required by yourself,
apart from the correct connection of each motor type (don‘t forget the hall-sensor-wire for brushless!).
Caution:
Keep in mind, when swopping between brushless and brushed motors, that the chosen mode values
will be identical!
Power Capacitor:
Never disconnect the installed power-capacitor! It must be used with brushless and
brushed motors. If the capacitor becomes damaged (dented, domed or swollen), speed-control failure may
occur and therefore immediately replace a damaged capacitor.
Caution:
longer wires to power-capacitor will decrease performance!
Changing Mode settings without the transmitter:
At most events you usually do not have access
to your transmitter, but never mind since you can simply disconnect the receiver lead from the receiver and
change the MODE settings as described in section 6 „Mode Programming“.
Works-Default-Settings:
All LRP speed-controls come factory-adjusted (defaults are grey-shaded above).
If you loose track of the modes, you can restore the works default settings. With the transmitter switched on,
hold the SET button pressed while you switch on the speed-control. This returns the unit to the LRP works
default settings.
Sensored Brushless Technology:
Advanced Digital allows the perfect knowledge of the brushless
motor’s magnet position. This results in perfect motor control at high and low RPM‘s, as well as perfect brake
control.
Multi-Protection System, 3-way protection:
The perfect protection against short-circuits (motor),
overload and overheating. If your speed-control faces overload, the motor function will be shut-off for protec-
tion and the SET LED will flash, although the steering function is maintained. Let the speed-control cool down
for a few minutes. If you experience frequent shutdowns, check functions with troubleshooting guide.
