STEP 1
Download SmartThings
Search for SmartThings in the App Store on an iPhone, or Google Play on Android. Check it's made by Samsung, then install it. Many Samsung phones already have it.
How to set up the SmartThings app, switch your air conditioning on and off, choose heating or cooling, set schedules and see what it uses. Covers single split (one indoor unit and its own outdoor unit) and multi split (several rooms on one outdoor unit).
Add the unit once and control it from one card in the app. Got more than one single split? Add each the same way. Each runs on its own, so one can heat while another cools.
Each indoor unit is added to the app on its own, room by room. They share one outdoor unit, so all the rooms must heat or all must cool (Part 04).
Once for each indoor unit.
Search for SmartThings in the App Store on an iPhone, or Google Play on Android. Check it's made by Samsung, then install it. Many Samsung phones already have it.
Open the app and sign in, or create a Samsung account with your email address and a password. Whoever sets it up can invite the rest of the family later (step 12).
Stand in the room with the unit and switch it on at the mains. In the app tap +, then Add device. Choose Samsung devices, then Air conditioner.
If the app offers it, you can scan the QR code on the unit's label instead.
The app shows you how for your model. Follow its steps exactly.
Your phone then talks directly to the unit for a moment. Stay close to it.
Pick your home network, type your Wi-Fi password and finish. The unit joins your router and the Wi-Fi light on the unit stays on.
Give it a room name you'll recognise, such as Lounge or Main bedroom. On a multi split, repeat steps 3 to 5 in each room.
Tap your unit's card to open its controls.
Tap the power button to switch on or off. Use + and - to set the temperature, from 16 to 30°C.
Most people are comfortable at 20 to 22°C for heating and 24 to 26°C for cooling. Each degree lower in summer, or higher in winter, uses more energy.
Tap Mode and pick what you want the room to do.
Works out heating or cooling for you. Needs Wi-Fi.
Cools the room on warm days.
Takes damp out of the air.
Moves the air without heating or cooling.
Heats the room, pausing now and then to defrost in cold weather.
Wind Strength sets the fan: Auto is best most of the time.
Wind Direction sets the flaps: fixed, side to side, up and down, or all directions.
Depending on your model, you may also see:
Let the app do the work.
Open your unit, then the schedule option. You can set up to 10 on and off times, on the days you choose, such as warm by 7am on weekdays. Schedules are kept through a power cut.
SmartThings Routines can do more, such as switching off when everyone has left home.
The Energy section shows how much electricity your unit uses. AI Energy Mode, on newer models, trims the settings to save power.
On some older multi splits, energy use isn't shown.
Tap the home icon, choose your home, then + and Member, and send an invitation. They sign in to SmartThings with their own Samsung account and can then control every device in your home.
Only the owner can remove members.
SmartThings works with Bixby, Amazon Alexa and Google Assistant. Link SmartThings in your Alexa or Google Home app, then say things like "turn the lounge to 21 degrees".
For multi split systems.
Each indoor unit shows as its own card, with its own name. Switch rooms on and off, and set each room's temperature, separately.
Group them in the app by room so they're easy to find.
The outdoor unit can heat or cool, not both at once. If one room is heating and you set another to cool, the second room won't run.
Set every room to the same mode. Fan mode is fine alongside either.
Most problems are Wi-Fi problems, and most are quick to fix.
If the unit is still connected, open it in the app, tap ⋮, then Settings, Wi-Fi, Change Wi-Fi network, before you change anything.
Already changed? Remove the unit from the app and add it again with steps 3 to 5.
If the app or the unit's display shows a code, switch the unit off and on once. If it comes back, write down the code and which room it's in, then contact your installer. Please don't keep switching it off and on, as the code tells an engineer what the unit needs.
Tick each one off as you go. Nothing here is saved or sent.
Samsung keep their own help pages for SmartThings up to date as the app changes.
SmartThings help: samsung.com/uk/support, then search for SmartThings.
Inviting family: Samsung's guide to inviting members.
Your yearly service keeps the system running efficiently and keeps your warranty in place.