E-flite UMX Sbach 342 BNF - Manual (Page 12)

12
EN
Troubleshooting Guide
Problem Possible Cause Solution
Aircraft will not
respond to throttle
but responds to other
controls Throttle stick and/or throttle trim too high Reset controls with throttle stick and throttle
trim at lowest setting
Throttle channel is reversed Reverse throttle channel on transmitter
Motor disconnected from receiver Open fuselage and make sure motor is
connected to the receiver
Extra propeller noise
or extra vibration Damaged propeller, spinner or motor Replace damaged parts
Prop screw is too loose Tighten the prop screw
Reduced fl ight time
or aircraft underpow-
ered Flight battery charge is low Completely recharge fl ight battery
Propeller installed backwards Install propeller with numbers facing forward
Flight battery 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 too low for fl ight conditions Replace battery or use a larger capacity battery
LED on receiver
fl ashes and aircraft
will not bind to
transmitter (during
binding) Transmitter too near aircraft during binding
process Power off transmitter, move transmitter a larger
distance from aircraft, disconnect and recon-
nect fl ight battery to aircraft and follow binding
instructions
Bind switch or button not held long enough
during bind process Power off transmitter and repeat bind process.
Hold transmitter bind button or switch until
receiver is bound
LED on receiver
fl ashes rapidly and
aircraft will not re-
spond 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 recon-
nect fl ight battery to aircraft
Aircraft bound to different model memory
(ModelMatch
TM radios only)
Select correct model memory on transmitter
and disconnect and reconnect fl ight battery to
aircraft
Flight battery/transmitter battery charge is
too low Replace/recharge batteries
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, connect
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
Controls reversed Transmitter settings reversed Do the Control Direction Test and adjust
controls on transmitter appropriately
Motor loses power Damage to motor or power components Do a check of motor and power components
for damage (replace as needed)
Motor power quickly
decreases and
increases then motor
loses power Battery power is down to the point of
receiver/ESC Low Voltage Cutoff (LVC) Recharge fl ight battery or replace battery that
is no longer performing
Motor/ESC is not
armed after landing Over Current Protection (OCP) stops the
motor when the transmitter throttle is set
high and the propeller cannot turn Fully lower throttle and throttle trim to arm ESC
Servo locks or freezes
at full travel Travel adjust value is set above 100%
overdriving the servo Set Travel adjust to 100% or less and/or set
sub-trims to Zero and adjust linkages
mechanically.