E-flite UMX Yak 54 180 BNF - Manual (Page 14)

14
EN
Problem Possible Cause Solution
LED on receiver fl ashes
rapidly and aircraft will
not respond to transmit-
ter (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 bound to different model memory
(ModelMatch
™ 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
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
Controls reversed Transmitter settings reversed 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 in-
creases 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
Troubleshooting Guide (Continued)
What this Warranty Covers
Horizon Hobby, Inc. (“Horizon”) warrants to the original
purchaser that the product purchased (the “Product”) will
be free from defects in materials and workmanship at the
date of purchase.
What is Not Covered
This warranty is not transferable and does not cover
(i) cosmetic damage, (ii) damage due to acts of God,
accident, misuse, abuse, negligence, commercial
use, or due to improper use, installation, operation or
maintenance, (iii) modifi cation of or to any part of the
Product, (iv) attempted service by anyone other than
a Horizon Hobby authorized service center, (v) Product
not purchased from an authorized Horizon dealer, or
(vi) Product not compliant with applicable technical
regulations.
OTHER THAN THE EXPRESS WARRANTY ABOVE, HORIZON
MAKES NO OTHER WARRANTY OR REPRESENTATION, AND
HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES,
INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. THE
PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE
DETERMINED THAT THE PRODUCT WILL SUITABLY MEET
THE REQUIREMENTS OF THE PURCHASER’S INTENDED
USE.
Purchaser’s Remedy
Horizon’s sole obligation and purchaser’s sole and
exclusive remedy shall be that Horizon will, at its option,
either (i) service, or (ii) replace, any Product determined
by Horizon to be defective. Horizon reserves the right to
inspect any and all Product(s) involved in a warranty claim.
Service or replacement decisions are at the sole discretion
Limited Warranty