
Troubleshooting Guide
Problem Possible Cause Solution
Aircraft will not
“throttle up” but
all other controls
seem to function.
•Userdidnotlower
throttle trim and throttle
stick prior to initializing
the aircraft.
•Lowerthrottlestickandthrottle
trim to their lowest settings.
Aircraft’s yaw/
rudder control is
inconsistent or
requires excessive
trim to neutralize
yaw movement.
•Userdidnotcenter
yaw/rudder trim prior
to initialization of 5-in-1
unit.
•Usermovedor
swayed aircraft during
initialization process.
•Disconnectflightbattery,center
rudder/yaw trim and re-initialize
aircraft. Pages 28–30
•Disconnectflightbatteryandre-
initialize aircraft. Pages 27–30.
LED on
Aircraft remains
flashing and
cannot be
controlled by
transmitter.
•Userdidnotwaitat
least 5 seconds
after powering their
transmitter prior to
connecting the flight
battery to the Aircraft.
•Userboundthe
Aircraft to a different
transmitter.
•Transmitterwastoo
close to Aircraft
during the initialization
process.
•Userusingametalor
reflective surface (e.g.
pickup truck bed, glass
table, etc).
•Un-plug,thenreconnectflight
battery.
•RebindAircrafttoyourdesired
compatible transmitter.
Page 15
•Movetransmitter(poweredon)a
few feet from the Aircraft
prior to reconnecting the flight
battery.
•Moveofforawayfromlarge
metal objects.
Aircraft does not
function after
connecting flight
battery and
aircraft smells
burnt.
•Usermayhave
accidentally connected
the flight battery with
the wrong polarity.
•Replace5-in-1board
(EFLH3001) and ensure the RED
polarity marks are facing the
same direction when connecting
the flight battery to the 5-in-1
board.
Aircraft appears
to show significant
decrease in flight
time.
•Flightbatteryisnotfully
charged.
•Inadequatepowerto
the charger.
•EFLB1201Sbatteryhas
been over-discharged
multiple times, causing
damage to battery life.
•Rechargeflightbattery
completely.
•ReplaceDbatteriesin
charger and recharge flight
battery completely.
•ReplaceEFLB1201Sbatteryand
read Battery Warnings and
Guidelines section of manual.
Pages 7–8
Problem Possible Cause Solution
Charger light stays
on after Li-Po
battery is
disconnected or
remains on for
longer than 40
minutes when
charging.
•Dbatteriesinthe
charger have
inadequate power.
•ReplaceDbatteriesinthe
charger or switch to power
supply (EFLC1005) included with
your Blade mSR.
Aircraft hovers
with a “toilet bowl”
effect type circle
on its own.
•Bindingintheupper
rotor head.
•Damagedrotorblades
•Missingarotorhead
linkage.
•FollowPrecision Swashplate
Calibration Tool section for
proper adjustment. The flybar
should seesaw freely, if not,
there is binding in the rotor
head. Page 37
•Replacerotorblades.
•Installreplacementcontrollink.
Aircraft appears
to drift towards a
certain direction.
•Userdidnotre-trimthe
aircraft.
• Read Understanding the
Primary Flight Controls.
Pages 27–30
Controls appear to
be reversed after
binding to a
different
transmitter.
•Userdidnotinitially
set up their transmitter
prior to binding to the
Aircraft.
•ReadControl Test section of
this manual. Pages 20–22
Aircraft constantly
spins on its own.
•UserdidnotCENTER
the rudder trim on the
transmitter prior to
initialization of aircraft.
•Usermovedorswayed
the aircraft during the
initialization process.
•Userhasnottrimmed
the aircraft to compen-
sate for battery voltage
drop during flight.
•DamagedorBroken
Tail Rotor Blade, or
Tail Rotor is pushed in
against the motor case.
•Centertheruddertrimonyour
transmitter and re-initialize the
aircraft.
•Unplug,thenreconnecttheflight
battery and DO NOT move or
sway the helicopter during
initialization.
•ReadUnderstanding Primary
Flight Controls section of this
manual. Pages 27–30
•ReplaceTailRotorEFLH3017or
remove and re-install properly.
Aircraft has bad
cyclic control
interactions (e.g.
user gives forward
elevator input and
helicopter flies
sideways to the
left or right)..
•Swashplateanti-rotation
pin could have popped
out of the anti-rotation
bracket on the main
frame.
•Carefullyplacetheswashplate’s
anti-rotation pin back in place.
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