User manual
Starting up the receiver
Preliminary remarks
The mz-18 HoTT and mz-24 HoTT remote control sets
each come with a GR-24 bidirectional 2.4 GHz receiver
which can be connected to a maximum of 12 servos, as
well as a bidirectional GR-12L HoTT receiver.
Using connectors 1 … 9, a maximum of 9
servos can be operated with the mz-18 HoTT
transmitter together with the GR-24 HoTT
receiver which comes with the set and is already linked
to the fi rst model memory. Any servos which are
connected to connectors 10 … 12 remain in their middle
position by default and cannot be actuated by the
transmitter.
In contrast, a maximum of 12 servos can be operated
with the mz-24 HoTT transmitter together with the
GR-24 HoTT receiver which comes with the set and is
already linked to the fi rst model memory.
If you have already switched on the GR-24 HoTT receiv-
er that comes with the set and its transmitter is not in
range or is switched off, the red receiver LED will shine
for a few seconds and then start to slowly fl ash. This
means that a link has not (yet) been established with a
Graupner-HoTT transmitter. Once a link is established,
a green LED shines continuously, and the red LED
extinguishes.
To establish a telemetry connection with the transmitter,
fi rst the Graupner HoTT receiver must be "bound" to its
model memory in its Graupner HoTT transmitter. This
procedure is called "binding." This binding only needs
to be performed once for each receiver/model memory
combination (see) and has already been done at the
factory for model memory 1 for the devices provided in
the set. Binding therefore only needs to be performed for
other receivers when the memory is changed (you can
repeat this at any time after changing a transmitter).
NOTE:
An activated receiver that has linked at least
once with "its" transmitter responds to any
incoming control signals from other model
memories of "its" transmitter like a secondary receiver.
Onboard voltage display
When a telemetry link exists, the current voltage of
the receiver power supply appears at the top left in the
transmitter display in yellow.
000 000
000
000
mz
000%
000%
000
000
BATT TIME 00: 01: 23
MODEL NAME 1
M 1
0:01:23
NORMAL
000:00.0
000:00.0
4.2V
RX TX
RX 05.2V
Temperature warning
If the receiver temperature falls below a threshold which
can be set in the receiver (-10°C by default) or exceeds
a top warning threshold (+55°C by default) which can
also be set in the receiver, the receiver emits a warning
in form of a beep that repeats approximately once per
second.
Servo connectors and polarity
The Servo connectors of the Graupner-HoTT receiver
are numbered. The polarity of the plug-in system cannot
be reversed. When inserting the plug, note the small
bevels on the side (see the fi gures on the next double-
page). Do not apply force.
The supply voltage runs through all the numbered
connectors.
With the GR-24 receiver, the two outermost vertical
connectors are for the battery. These are identifi ed with
"11+B-" and "12+B-". A corresponding servo along
with the power supply can be connected to the two
connectors using a V or Y cable (order No.: 3936.11).
NOTE:
Do not reverse the polarity of these con-
nectors! This can destroy the receiver and
connected devices (see the next double
page).
The function of each channel is determined by the
transmitter and not the receiver. Depending on the make
and model, throttle servo connection, along with other
connections, can be different. With Graupner|JR and
Graupner remote controls, this connection is at channel
1 for fi xed-wing models, and at channel 6 for helicopters.
Note the installation instructions for the receiver, receiv-
er antennas and servos on page 34.
Final instructions:
•
The signifi cantly higher servo resolution of
the HoTT system leads to a noticeably
more direct response in comparison to the
previous systems. Take time to familiarize yourself
with this more sensitive response!
• If you are using a speed controller with an integrated
BEC* in addition to the receiver battery, the plus
pole (red cable) may have to be removed from the
3-pin plug depending on the speed controller. In this
regard, take note of the related information in the
speed controller instructions.
red
1
2
Use a short screwdriver to
carefully lift the middle tab of
the plug (1), remove the red
cable (2), and use electrician's
tape to protect against shorts
(3).
Reset
To reset the receiver, hold down the SET button on the
top of the receiver while turning on the power. Hold
down the SET button of the receiver until, after about
3 seconds, the slowly fl ashing red/green LED extin-
guishes for about 2 seconds.
If the reset procedure is performed while the transmitter
is switched off or the receiver is not linked, the green
and red LEDs fl ash four times over about 3 seconds in
the standard GR-24 receiver that comes with the set,
then both LEDs extinguishes for about 3 seconds, and
then the red LED starts to fl ash. Release the button
once the LEDs extinguishes.
32
Starting the receiver
S1006_mz-24.3.en.indd 32 17.12.2014 15:21:22