The Motors; Trouble Shooting - Walkera Ikarus HM 5 4B HM Manuel D'utilisation

The included capacitors are suppressing interferences, which can be caused by the brush fire on the
commutator. Do not operate the motor without these suppressors. Solder the capacitors as shown
between the connector tabs and the grounding motor housing as well as one capacitor between the
tabs (insulate with black shrink tubing). Scratch the area on the motor housing blank before soldering
to it. Now solder the tubular diode and the connector wire set to the tabs. Pay attention that the silver
ring on the diode is pointing towards the positive pole (see photo). Otherwise the electronic may get
destroyed.
Negative pole (-)
Positive pole (+)
Wiring
diagram
The helicopter does not start
- For safety reasons you have to set the transmitter throttle stick and its trim lever into idle position
(pull the stick and trim lever towards you) prior to switching on the transmitter. If this is not done,
the helicopter will not start up. Now you need to wait a few moments until the green LED on the
electronic unit does not flash anymore but lights up steady. In the meantime do not give any control
inputs on the transmitter.
- Your flight battery is discharged and requires to charging.
Motors are running, but the rotor is not spinning
- Check that the gears are intermeshing. If not, loosen the screws of the motor and push the motor
towards the larger gear. Run a strip of paper between motor pinion and gear to adjust for correct
gear mesh. A too tight gear mesh will overload the motor and speed controller; a too loose gear
mesh will destroy the main gear.

The Motors

Tail motor is mounted in the front of the chassis.
Pinion is down.
Main motor is mounted in the rear of the chassis.
Long wire set
Pinion is
up.

Trouble Shooting

33
Short wire
set
Red
marking
for positive
pole!
Red marking
for negative
pole!