E-FLITE UMX Vapor Lite HP BNF Basic, Instruction Manual

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Troubleshooting Guide
Problem
Possible Cause Solution
Aircraft will
not respond to
throttle but re-
sponds to other
controls Throttle stick and/or throttle trim is too
high Reset controls with throttle stick and
throttle trim at lowest setting
Throttle channel is reversed Reverse throttle channel on transmitter
Extra propeller
noise or extra
vibration Damaged propeller, prop shaft or motor Replace damaged parts
Nut on prop shaft is too loose Tighten the prop shaft nut 1/2 turn
Reduced fl ight
time or aircraft
underpowered Flight battery charge is low Completely recharge fl ight battery
Propeller is installed backwards Install propeller with numbers facing
forward
Flight battery is damaged Replace fl ight battery and follow fl ight
battery instructions
Flight conditions may be too cold Make sure battery is warm before use
Battery capacity is too low for fl ight
conditions Replace battery or use a larger capacity
battery
LED on receiver
fl ashes rapidly
and aircraft will
not bind to
transmitter (dur-
ing binding) Transmitter is too near aircraft during
binding process Power off transmitter, move transmitter a
larger distance from aircraft, disconnect
and reconnect fl ight battery to aircraft and
follow binding instructions
Bind switch or button was not held while
transmitter was powered on Power off transmitter and repeat bind
process
Aircraft or transmitter is too close to large
metal object, wireless source or another
transmitter Move aircraft and transmitter to another
location and attempt binding again
LED on receiver
fl ashes rapidly
and aircraft will
not respond to
transmitter (after
binding) Less than a 5-second wait between fi rst
powering on transmitter and connecting
fl ight battery to aircraft Leaving transmitter on, disconnect and
reconnect fl ight battery to aircraft
Aircraft is bound to a different model
memory (ModelMatch
TM
radios only)
Select correct model memory on transmit-
ter and disconnect and reconnect fl ight
battery to aircraft
Flight battery/transmitter battery charge
is too low Replace/recharge batteries
Transmitter may have been bound to a
different model (or with a different DSM
Protocol) Select the right transmitter or bind to the
new one
Aircraft or transmitter is too close to large
metal object, wireless source or another
transmitter Move aircraft and transmitter to another
location and attempt linking again
Control surface
does not move Control surface, control horn, linkage or
servo damage Replace or repair damaged parts and
adjust controls
Wire damaged or connections loose Do a check of wires and connections; con-
nect or replace as needed
Flight battery charge is low Fully recharge fl ight battery
Control linkage does not move freely Make sure control linkage moves freely
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