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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › Futaba 18mz problem
08-11-2019 11:52 AM  6 days ago
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martinhung

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Hong Kong

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Futaba 18mz problem
I left the 18mz for half year and when I charge back the battery and switch on the 18mz, only red light is showed but no screen. Does anyone know what is the problem? Do I need to send back to Futaba? Thx
I am nobody, but a RC heli freak
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08-11-2019 12:03 PM  6 days ago
Ace Dude

rrProfessor

USA

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I would try measuring the voltage of the battery at the battery connector to confirm the battery is good and each cell has similar voltage.  
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08-11-2019 01:11 PM  6 days ago
Dr.Ben

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Richmond, VA, USA

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Pete's assessment is likely correct. That's a battery issue. It will deplete over time. Like other lipos, you will have to see if it recovers from the fully discharged state.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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08-11-2019 09:55 PM  6 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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/
/

It is posible that your lithium pack is gone...

Like any other lithium and Lithium polimer packs, you need special care if you are not going to used your stuff for a while.

/
Saludos cordiales,
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08-11-2019 10:25 PM  6 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Internal balancer may not working because low voltage issue...

To "wake up" that pack, you need to increase voltage Per cell to 3.5 volts at least...

To do so, with the battery out of 18mz, I would make connections and charge using NiCD programming for 1 or 2 min with 1 Amp...on each cell.
Repeat several times to achieve a voltage increment.

After that, my charger begin to charge without problem using lipo programming. In your case, install your pack on 18mz and charge normally.

If you don't understand my point, you better look for a friend to do such a procedure.

If you don't like this kind of procedure that could be dangerous, I don't blame you, buy a new one.

/
Saludos cordiales,
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08-12-2019 01:28 AM  5 days ago
wjvail

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Meridian, Mississippi

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Six months is not that long for a transmitter to sit. I would not expect a problem after only being out of service for only a few months.

From Futaba... A "Red Light" indicates the transmitter is "starting". Futaba says a "cold start" will take about 30 seconds. You have waited a period of time to see if the start finishes in a proper boot?
LED monitor
The status of the transmitter is displayed by
changing the “MONITOR” section LED.
(LED Display)
* FASSTest mode → Light Blue light
* FASST mode → Green light
* S-FHSS mode → yellow-green light
* RF-OFF → Violet light
* Starting → Red light
* Trainer Student → Blue light
Also from the users manual:
How to reset software
If the screen freezes for some reason and you
cannot edit, the transmitter power supply is not
fully off even if you turn OFF the power switch.
You will need to remove the battery and reinsert
it again. In this case, the power restarts in “Cold
mode”. Even though the screen freezes, all the
other functions for radio control operation remain
operative.
Is there any possibility the Firmware update switch is activated?

Are you the first owner? Can we assume it was working when you put it away last?

Have you tried booting the radio with the charger connected?

Even if you left the transmitter on, it may have powered off after 30 minutes to preserve your battery.
"Well, nothing bad can happen now."
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08-12-2019 04:19 PM  5 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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wjvail...
Is there any possibility the Firmware update switch is activated?
/
/

12Z / 14MZ were not the last one with this switch...

It is not easy to operate by mistake this switch...

/
Saludos cordiales,
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08-12-2019 04:38 PM  5 days ago
wjvail

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Meridian, Mississippi

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Rojoalfa...
12Z / 14MZ were not the last one with this switch...
No. I updated my 18MZ just last week. There's a small switch inside the side cover. Pg 163 -->> http://manuals.hobbico.com/fut/18mz-manual.pdf
Rojoalfa...
It is not easy to operate by mistake this switch...
Certainly true. I'd say it's impossible to hit this switch by accident. It's fussy to actuate the switch on purpose! My thought was maybe the last thing done to the TX before putting it away 6 months ago was to try and update it. Possibly an update failed or a previous owner sold the radio without resetting the switch. Just a thought. I'm trying to think of reasons the radio is not completing its boot-up.

The battery failing is a leading contender. With that said, my 18MZ is as old as any out there and I'm still using the OEM Futaba battery without a problem. Possibly booting the radio with the charger connected will allow it to finish booting even though the battery is no longer capable of powering the TX.
"Well, nothing bad can happen now."
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08-13-2019 02:26 PM  4 days ago
wjvail

rrKey Veteran

Meridian, Mississippi

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martinhung...
I left the 18mz for half year and when I charge back the battery and switch on the 18mz, only red light is showed but no screen. Does anyone know what is the problem? Do I need to send back to Futaba? Thx
Please post to let us know if you have found a solution to this problem - for posterity's sake.
"Well, nothing bad can happen now."
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08-13-2019 02:41 PM  4 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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wjvail...
Please post to let us know if you have found a solution to this problem - for posterity's sake.
/
/

...

/
Saludos cordiales,
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08-17-2019 04:14 AM  18 hours ago
JLF92677

rrApprentice

Southern California

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Martinhung,

Measure battery voltage between the battery red and black leads. If the voltage is less than 6.3 - 6.5 VDC the 18MZ will not boot and the red charging transmitter light will not turn on because the battery voltage is too low. You can try charging the the battery with an external lipo battery charger to bring the battery voltage above 6.8 to preferably 7.0 VDC. If you want to try this, connect the battery to your lipo charger only using the red and black leads on the battery to the charger, do not connect the charger to the white lead. You need to make your own charger to battery connector as the standard 2S balance lead will not work. Set the charger to lipo 2S and apply 0.3 A charging current until the battery voltage reaches 6.8 - 7.0 VDC. Then disconnect the battery from the charger and connect it to 18MZ and continue charging the battery with the 18MZ charger. This method will work provided that the battery is not defective. I suggest not to install the battery inside the transmitter battery compartment in case the battery is defective. You can just plug it to the transmitter with the battery sitting outside the 18MZ on the bench. You can make an extension to put distance between the battery and the transmitter. Make sure to supervise the battery throughout the entire charging process to make sure that it is not defective and does not overheat.

Here are 2 pics of the setup described above:

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