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Lift master 1140lm

Need to reset unit

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I have a 10000 btu arctic king ac unit and it won't turn on. I,checked the troubleshooting guide and it assumes that you are ignorant. it's plugged in and reset and the breaker is fine. Please help!

Is this a unit with remote control? Some models have a master on/off switch witch you lift the front cover like you would to clean the filters.

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Page 88 in the Manual:


1. Press Master On/Off to set the unit to the standby mode.

2. Press and hold STRAIGHT / EFECT on the front panel; and then press Master On/Off inward to the ON position to turn on the power to this unit.

3. Rotate the PROGRAM selector on the front panel to select the parameter you want to adjust.

The name of the selected parameter appears in the front panel display.

4. Rotate the PROGRAM selector on the front panel repeatedly to change the setting.

5. s Master On/Off on the front panel to release it toward the Off position to save the new settigns and set the unit to standby mode.

THIS is the parameter you want to find in the procedure above:


Use to reset all the parameters of this unit to the initial factory settings with the exception of System Memory and AUTO SETUP settings.
* Select CANCEL if you do not want to reset the parameters of this unit.
* Select RESET to reset the parameters of this unit.

Mar 30, 2010 | Yamaha HTR-5990 Receiver

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Hello I have a simon 3 and need to reset the master code, I dont have the old code. What can I do to start using the system again

You can change the master code only if you have the installer code. If you don't have the installer code, the only way I know of to reset the master code is to reset it to factory defaults. This does mean that you will have to completely re-progam the system. I would document as much stuff as you can from the display before resetting it. If you don't have a copy of the installation manual I am providing a link below. Hope this helps.

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Hard Reset

Hello DoctorJ16,

If you mean hard reset as in reflashing the unit with software, it shouldn't make too much of a difference. Are you experiencing a problem with the unit or you just want to set everything back to default?

You can get similar results by performing the master clear and master reset option.

Go to the Menu and click on Settings
From there you'll want to scroll down to "Initial Setup"
Scroll down to the bottom and you will see both Master Clear and Master Reset.

I suggest you do the Master Clear first, the code should be six "0", entered "000000".
After which you can perform the Master Reset, same code.

Hope this helps,

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I can not turn on my 530 and it dos not show that the battery is being charged on the screen

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Have you downloaded anything to the unit, such as MP3s or updated maps? Have you tried resetting the unit? What about a Master Reset? If you need to do this, and don't know how, let me know. Just be aware, if you do a Master Reset, it will ERASE ALL OF YOUR FAVORITES.

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