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Troubleshooting Guide
Problem
Possible Cause
Solution
Aircraft will not
“throttle up” but
all other controls
seem to function.
• User did not lower
throttle trim and throttle
stick prior to initializing
the aircraft.
• Lower throttle stick and throttle
trim to their lowest settings.
Aircraft’s yaw/
rudder control is
inconsistent or
requires excessive
trim to neutralize
yaw movement.
• User did not center
yaw/rudder trim prior
to initialization of 5-in-1
unit.
• User moved or
swayed aircraft during
initialization process.
• Disconnect flight battery, center
rudder/yaw trim and re-initialize
aircraft. Pages 24–26
• Disconnect flight battery and re-
initialize aircraft. Pages 23–26.
LED on
Aircraft remains
flashing and
cannot be
controlled by
transmitter.
• User did not wait at
least 5 seconds
after powering their
transmitter prior to
connecting the flight
battery to the Aircraft.
• User bound the
Aircraft to a different
transmitter.
• Transmitter was too
close to Aircraft
during the initialization
process.
• User using a metal or
reflective surface (e.g.
pickup truck bed, glass
table, etc).
• Un-plug, then reconnect flight
battery.
• Rebind Aircraft to your desired
compatible transmitter.
Page 34
• Move transmitter (powered on) a
few feet from the Aircraft
prior to reconnecting the flight
battery.
• Move off or away from large
metal objects.
Aircraft does not
function after
connecting flight
battery and
aircraft smells
burnt.
• User may have
accidentally connected
the flight battery with
the wrong polarity.
• Replace 5-in-1 board
(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.
• Flight battery is not fully
charged.
• Inadequate power to
the charger.
• EFLB1201S battery has
been over-discharged
multiple times, causing
damage to battery life.
• Recharge flight battery
completely.
• Replace D batteries in
charger and recharge flight
battery completely.
• Replace EFLB1201S battery and
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.
• D batteries in the
charger have
inadequate power.
• Replace D batteries in the
charger or switch to power
supply (EFLC1005) included with
your Blade mSR.
Aircraft hovers
with a “toilet bowl”
effect type circle
on its own.
• Binding in the upper
rotor head.
• Damaged rotor blades
• Missing a rotor head
linkage.
• Follow Precision Swashplate
Calibration Tool section for
proper adjustment. The flybar
should seesaw freely, if not,
there is binding in the rotor
head. Page 33
• Replace rotor blades.
• Install replacement control link.
Aircraft appears
to drift a certain
direction.
• User did not re-trim the
aircraft.
• Read Understanding the
Primary Flight Controls.
Pages 23–26
Controls appear to
be reversed after
binding to a
different
transmitter.
• User did not initially
set up their transmitter
prior to binding to the
Aircraft.
• Read Control Test section of
this manual. Pages 16–18
Aircraft constantly
spins on its own.
• User did not CENTER
the rudder trim on the
transmitter prior to
initialization of aircraft.
• User moved or swayed
the aircraft during the
initialization process.
• User has not trimmed
the aircraft to compen-
sate for battery voltage
drop during flight.
• Damaged or Broken
Tail Rotor Blade, or
Tail Rotor is pushed in
against the motor case.
• Center the rudder trim on your
transmitter and re-initialize the
aircraft.
• Unplug, then reconnect the flight
battery and DO NOT move or
sway the helicopter during
initialization.
• Read Understanding Primary
Flight Controls section of this
manual. Pages 23–26
• Replace Tail Rotor EFLH3017 or
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).
• Swashplate anti-rotation
pin could have popped
out of the anti-rotation
bracket on the main
frame.
• Carefully place the swashplate’s
anti-rotation pin back in place.
