34
35
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35
Troubleshooting Guide
Troubleshooting Guide
Problem
Possible Cause
Solution
Heli will not
“throttle up” but
all other controls
seem to function.
• User did not lower
throttle trim and throttle
stick prior to initializing
the heli.
• Throttle channel is
reversed.
Note:
Futaba
transmitters (equipped
with Spektrum
modules) may require
you to reverse the
throttle channel.
• Lower throttle stick and throttle
trim to their lowest settings.
• Reverse throttle channel on
specific transmitter if applicable.
Upper rotor head/
hub is broken.
• Crash damage
• Replace with EFLH2212 by
carefully removing the (2)
screws in the lower main gear
and transferring all unbroken
parts to the new upper rotor
head/hub. Follow the “Exploded
View” section of the manual.
Pages 32–33
Heli appears to
show significant
decrease in flight
time.
• Flight battery is not fully
charged.
• EFLB2501S battery has
been over-discharged
multiple times, causing
damage to battery life.
• Recharge flight battery
completely.
• Replace EFLB2501S battery
and read “Battery Warnings and
Guidelines” section of manual.
Page 7
Heli hovers with a
“toilet bowl” effect
type circle on its
own.
• Binding in the upper
rotor head.
• Damaged rotor blades
• Loosen upper rotor hub flybar
retaining screw.
• Replace rotor blades.
Red LED on 5-in-1
unit remains flash-
ing and cannot be
controlled by
transmitter.
• User did not wait at
least 5 seconds after
powering transmitter
prior to connecting the
flight battery to the heli.
• User bound the heli to
a different
transmitter.
• Transmitter was too
close to Heli during the
initialization
process.
• Unplug, then reconnect flight
battery.
• Rebind the heli to your desired
compatible transmitter.
Page 29
• Move transmitter (powered on) a
few feet from the Heli
prior to reconnecting the flight
battery.
Problem
Possible Cause
Solution
Heli appears to
drift toward a
certain direction.
• User did not re-trim the
heli.
• Read “Understanding the
Primary Flight Controls” section
of this manual.
Pages 22–25
Controls appear to
be reversed after
binding to a differ-
ent transmitter.
• User did not initially set
up transmitter prior to
binding to the heli.
• Read “Control Test” section of
this manual.
Pages 16–18
Heli constantly
spins on its own.
• User did not CENTER
the rudder trim on the
transmitter prior to
initialization of the heli.
• User moved or swayed
the heli during the
initialization process.
• User has not trimmed
the heli to compensate
for battery voltage drop
during flight.
• Upper main gear is
binding with lower main
gear.
• Center the rudder trim on your
transmitter and re-initialize the
Heli.
• Unplug, then reconnect the flight
battery and DO NOT move or
sway the helicopter during
initialization.
• Read “Understanding Primary
Controls” section of this manual.
Pages 22–25
• Loosen (2) screws on the lower
main gear and ensure there
is slight “play” in between the
upper and lower main gears.
Lube between the upper and
lower main gears if applicable.
Heli does not
function after
connecting flight
battery and the
heli smells burnt.
• User may have
accidentally plugged
the flight battery in the
wrong polarity.
• Replace 5-in-1 board
(EFLH2501) and ensure the
keyed battery mount and battery
case are properly oriented when
installing the battery.
Summary of Contents for Blade MCX Tandem Rescue
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