How to programm 30 minutes "SLEEP" - Technics SC-DV290 System

Not sure that the model number is correct. Nothing shows on their site. Contact them direct.

https://acctim.com/manuals/?wpv_view_count=1683&wpv_post_search=&wpv-wpcf-model-number=13067&wpv_filter_submit=Search

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There should be a sleep mode button on the remote. Press this then pres ok/enter.
Note: In this "MODE" the selected temperature will increase by 2 degrees F 30 minutes after the mode is selected. The temperature will then increase by another 2 degrees F after an additional 30 minutes. This new temperature will be maintained for 7 hours before it returns to the originally selected temperature. This ends the "Sleep" MODE and the unit will continue to operate as originally programmed. The "Sleep" MODE program can be canceled at any time during operation by pressing; Sleep MODE, "On/Off", "Fan Only" or the "V//X" buttons, on either the Control or the Remote. "Time Delay Stop" limit reached will also end "sleep" MODE.

There is a sleep mode on remote and set that only allows set to run for 30 minutes read your owners manual i'm sure it will tell you how to disable sleep mode.

i think there might be some programming fault .
so set the timer again or

start pause button

after having selected the required programme press this button to start the machine the corressponding pilot light stop falshig.
to interrupt the programme which is running depress the start/ pause button the corresponding light start to flash.
to restart the programme from the point at which it was interupteed
press the start/puase bitton again.

I think I understand what you are describing based on some inadvertent button pushing on your part.
Sleep mode programming on the VSI controller by Penny and Giles Drive technology is the idle time of the power chair before it "goes to sleep". This computer menu is accessed using a hand held PP1 programmer that is plugged into the charging port of the joystick. Using this programmer one can scroll down to the sleep mode menu and set the time from I think 1 to 120 minutes ( I have not accessed this particular programming menu for quite some time).
If I put in 10 and save this number the chair will go into sleep mode after sitting and not being used for 10 minutes. The control may have dropped one of the settings due to a program glitch. I do not know of a way to reprogram this by pushing buttons on the control itself.
You should drive the chair into a local dealer who has a PP1 programmer and let them program it for you. This is a 2 minute deal and they should do this as a courtesy for you at no charge. If a technician comes out to your house they may charge you a minimum 1 hour labor charge.
While they have the programmer plugged in, have them check the fault log for any other problem areas. Hope this helps.

Make sure in your setting your computer isn't set to:

When should your computer go to sleep;
1 hour
30 minutes
20 minutes
10 minutes
5 minutes
NEVER

For this machine the length of time of between 30 minutes and 2 hours can be programmed in 30 minute increments for the soak process.

The machine is set ex works with a soak period of 2 hours.

To programme in a different soak period see "Programmable functions - Soak" in your user manual. See Page 59.

There might be three or more reasons for this:
1) The sleep timer may be on causing the TV to turn off after a preset time.
2) If sleep timer is on and no signal from the remote is received for a preset time (Samsung: 15 minutes) the tv will turn itself off.
3) The TV may have been turned on automaticaly with "On Timer". If so, and no signal is received for a preset time (Samsung: 3 hours) the tv will turn itself off.
4) A fan is not working or a vent is blocked causing the TV to overheat and turn off.
For 1) thru 3), go to the "setup" menu and make sure "sleep timer" and "On Timer" are turned off.

Do A "Cold" Boot...
Remove The Battery For 30 minutes, And Leave It Unplugged..

With No Battery in and No Charger Cord Plugged In Now, Press and Hold the Power Button Down For 30 Seconds.....

After 30 minutes, Replace Battery and AC Adapter and Attemt to power on "hopefully not in sleep mode"

CHECK THE RECORDING OR SLEEP TIMER