Due to updates and constantly improving performance, the information and
instructions within this manual are subject to change without notice.
Version Date: 03/13/24
Please visit www.mrcool.com/documentation to ensure you have the latest
version of this manual.
MRCOOL
Smart Wi-Fi Mini-Stat
Installation & Owner’s Manual
MODEL: MST05
MRCOOL Smart Wi-Fi Mini-Stat can be mounted on a wall using
the backplate, or placed on a table using the table stand (both
included in the box).
Before finalizing the placement, it is recommended to first
power up, register and test the device to ensure signals can
easily reach the AC.
Special Note: It is strongly advised that whenever
there is a need to use the remote control for
MRCOOL Ductless Mini-Split, point it towards Smart
Wi-Fi Mini-Stat while performing any action. This
way, your MRCOOL Ductless Mini-Split and MRCOOL
SmartHVAC app will always be in sync.
For optimal placement and control:
Make sure Smart Wi-Fi Mini-Stat is in the line of
sight of your MRCOOL Ductless Mini-Split.
To avoid deviated sensor readings, do not place
Smart Wi-Fi Mini-Stat where it may be exposed to
excessive sunlight or other heat sources.
○
○
Getting Started
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MRCOOL Smart Wi-Fi Mini-Stat can be powered up using a 5V
adapter (always use the provided power adapter and USB cable
for optimal results).
Through wired connection
options of 24V or 12V.
Please DO NOT use any other voltage level to
power up Smart Wi-Fi Mini-Stat. Please choose ONLY
ONE power-up option i.e., either 5V OR 24/12V.
OR
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Powering Up Options
Step 1: Switch off power by using the circuit breaker. This is very
important for your safety.
Step 2: Find a point where 24V or 12V is available (In case of
non-availability of 24V/12V point, you can either DIY or
consult a professional installer). Ensure that chosen point
is also in the line of sight of your MRCOOL Ductless
Mini-Split.
Please DO NOT use any other voltage level to power up
the Smart Wi-Fi Mini-Stat.
Step 3: Take out the wires through the hole in the middle of the
backplate. Screw in the backplate using the provided pair
of drywall anchors and screws.
C
R
C
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Instructions for Wired Connection
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Step 4: Smart Wi-Fi Mini-Stat has two terminals
marked as Rc and C on its backplate.
Insert red wire into Rc and black wire
into C from the side (press the terminal
block buttons for ease of insertion).
Step 5: Align your Smart Wi-Fi Mini-Stat with the backplate and
press gently to fix it properly.
Your installation is complete.
Please switch on power from the circuit breaker.
Instructions for Wired Connection
C
R
C
C
R
C
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Getting Help
For any queries, visit our
website:
mrcool.com/contact
No long queues, no bots, no delays.
We answer 98% calls in less than 2 minutes and
guarantee that you will talk to a REAL person.
Call us at : (+1) 425-529-5775
9:00AM - 9:00PM ET, Mon-Fri
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Make sure you have a working internet
connection on your Wi-Fi router.
Make sure there is no proxy server or
authentication server configured on your
internet connection.
Make sure there is no captive portal on
your Wi-Fi router.
○
○
○
Make sure your smartphone’s Bluetooth
is turned ON.
Make sure your smartphone’s Wi-Fi is turned ON.
Make sure your smartphone has internet access.
○
○
○
Prior to App Installation
Important:
Make sure IP isolation or client isolation is turned OFF
on your Wi-Fi router.
Install the ‘MRCOOL SmartHVAC’ app from the App Store/Play
Store.
Search for the SmartHVAC app or scan the QR code provided below.
Log in to the app if you already have an account; otherwise,
create one using the sign-up option.
Note for Android users:
For Android OS 8.1 & above, location permission is required
to complete the registration process. You may disable it
later.
○
For iOS 13.0 & above, location permission is required to
complete the registration process. You may disable it
later.
○
Note for iOS users:
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App Installation & Registration
iOS / Android
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Open the MRCOOL SmartHVAC app, tap ‘Add Device’ on the
home screen, and select
Smart Wi-Fi Mini-Stat
from the list of
devices.
Device Registration
iOS / Android
If you are already using a MRCOOL device, tap ‘+’ on
the home screen to add this one.
Step 1:
Make sure your Smart Wi-Fi Mini-Stat is powered on.
Step 2:
Make sure your phone’s Bluetooth is turned on.
Tap ‘Next’.
Follow the steps to successfully pair your
Smart Wi-Fi Mini-Stat with your phone.
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Step 3:
Wait for Smart Wi-Fi Mini-Stat
to appear on the screen.
Then, tap ‘Connect’.
Note:
In case Smart Wi-Fi Mini-Stat
does not appear, touch and hold the
Power and Temperature Up buttons
simultaneously for 6 seconds.
The Bluetooth icon on the screen
should start blinking and the app
will automatically move
to the next screen.
73
70.8
Cooling to
45%
Heating to
13:37
AM
PM
f
DR
Off
Heat
Aux
Fan
Auto
Cool
Dry
Following
Schedule
Permanent
Hold
Temporary
Hold
Cancel
Hold
Sensor
Linked
Auto
Quiet
Fan
On
Fan
Circ
Fan On
Aux Heat On
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70.8
Cooling to
45%
Heating to
13:37
AM
PM
f
DR
Off
Heat
Aux
Fan
Auto
Cool
Dry
Following
Schedule
Permanent
Hold
Temporary
Hold
Cancel
Hold
Sensor
Linked
Auto
Quiet
Fan
On
Fan
Circ
Fan On
Aux Heat On
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Step 4:
Your device is now successfully paired with Bluetooth.
Name your device and connect it to a Wi-Fi network.
Step 5:
After Wi-Fi configuration,
your device will appear on the
home screen.
The registration process is complete.
Enjoy your smart air conditioning!
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Your Home Screen
Your home screen shows the real-time status of all your
MRCOOL devices. A registered MRCOOL device can show
either of the 2 statuses outlined in circles:
Green - Device is online.
You’re good to go!
Red - Device is offline.
Ensure your phone/device
is connected to a working
internet connection.
Refresh the home screen
by swiping downwards
(pull-to-refresh).
1
2
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MRCOOL Smart Wi-Fi Mini-Stat automatically selects the
relevant remote control for your MRCOOL Ductless Mini-Split
during the registration process. You can also configure your
AC remote manually.
In case, you need any further assistance, please contact
Support for help at (+1) 425-529-5775 or if you have any
queries, visit our website: mrcool.com/contact
Quick Tip: Remote control model number is
usually found on the back side of the remote
control, as shown in the image.
Configuring the
Right Remote Control for Your
MRCOOL Ductless Mini-Split
For manual selection, follow these steps:
Screen A: Go to settings by tapping the ‘Settings’ icon on
the control screen
Screen B: Select ‘Change Appliance’
Screen C: Select the ‘Remote Model’ from the drop-down list
and tap ‘Done’
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Screen A Screen B
Screen C
Tap the settings icon for more options
Enjoy Unlimited Functionalities
Mode
Swing Position
SetPoint
Room Humidity
Power
Settings
Presets
Temperature
Control
Room
Temperature
Navigation Bar
Fan Speed
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Wi-Fi Indicator
No Internet Access
Know Your Smart Wi-Fi Mini-Stat
73
70.8
Cooling to
45%
Heating to
13:37
AM
PM
f
DR
Off
Heat
Aux
Fan
Auto
Cool
Dry
Following
Schedule
Permanent
Hold
Temporary
Hold
Cancel
Hold
Sensor
Linked
Auto
Quiet
Fan
On
Fan
Circ
Fan On
Aux Heat On
Adjusting the temperature of your AC:
Use the up or down button to set the temperature of your choice.
Changing the mode of your AC:
Touch the menu button once. The AC modes will start blinking. Use the up or down
button to select the mode (e.g. Cool, Heat etc.).
Changing the fan speed:
Touch the menu button twice. The fan speed icon will start blinking. Use the up or
down button to change the fan speed.
Adjusting the swing position:
Touch the menu button thrice. The swing position icon will start blinking. Use the up or
down button to select the swing position.
Changing multiple settings:
You can set mode, swing position & fan speed in one go. Touch the menu button once
and select the mode of your choice. Touch the menu button again and adjust the fan
speed. Touch the menu button again and select the swing position.
Modes
Presets Icons
Swing Position
Fan Speed
Room Temperature
SetPoint Temperature
Room Humidity
Presets
Power On/Off
Temperature
Up & Down
Menu
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Locking/Unlocking the display interface:
Touch and hold the Temperature Up and Down buttons simultaneously until the lock
icon on the top right of the screen turns solid/disappears.
Resetting the Wi-Fi of Smart Wi-Fi Mini-Stat:
Touch and hold the Temperature Up and Power buttons simultaneously until the Wi-Fi
icon disappears and the Bluetooth icon starts blinking.
Wi-Fi Icon:
Case 1:-
Stable Wi-Fi icon - Device is connected to the internet, showing Wi-Fi strength.
Case 2:-
Wi-Fi icon with small triangle - Device is connected to the router but has no internet
access. Please ensure you have a working internet connection and restart the device.
Bluetooth Icon:
Blinking Bluetooth icon - Device is in broadcast (AP) mode. Please complete the registration
process.
73
70.8
Cooling to
45%
Heating to
13:37
AM
PM
f
DR
Off
Heat
Aux
Fan
Auto
Cool
Dry
Following
Schedule
Permanent
Hold
Temporary
Hold
Cancel
Hold
Sensor
Linked
Auto
Quiet
Fan
On
Fan
Circ
Fan On
Aux Heat On
Locking/Unlocking
Display Interface
Resetting Wi-Fi
Bluetooth Indicator
Screen Lock/Unlock
Indicator
Know Your Smart Wi-Fi Mini-Stat
LIMITED WARRANTY &
END USER LICENSE AGREEMENT
1. MRCOOL warrants to the owner of the enclosed MRCOOL Smart Wi-Fi Mini-Stat contained in this (“Product”) will be free from defects in
materials and workmanship for a period of one (1) year from the date of delivery, following the original retail purchase (the “Warranty
Period”).
2. If the Product fails to conform to this Limited Warranty during the Warranty Period, MRCOOL will, at its sole discretion, either repair or
replace any defective Product or component.
3. Repair or replacement may be made with a new or refurbished product or components, at MRCOOL’s sole discretion.
4. If the Product or a component incorporated within it is no longer available, MRCOOL may replace the Product with a similar product of
similar function, at MRCOOL's sole discretion.
5. Any Product that has either been repaired or replaced under this Limited Warranty will be covered by the terms of this Limited Warranty
for the longer of ninety (90) days from the date of delivery or the remaining Warranty Period. This Limited Warranty is non-transferable from
the original purchaser to subsequent owners and the Warranty Period will not be extended in duration or expanded in coverage for any such
transfer.
6. WARRANTY CONDITIONS; HOW TO GET SERVICE IF YOU WANT TO CLAIM UNDER THIS LIMITED WARRANTY
Before being able to claim under this Limited Warranty, the owner of the Product must (a) notify MRCOOL of the intention to claim by visiting
our website during the Warranty Period and providing a description of the alleged failure, and (b) comply with MRCOOL's return shipping
instructions.
7. WHAT THIS LIMITED WARRANTY DOES NOT COVER
This warranty does not cover the following (collectively "Ineligible Products"): Products marked as "sample" or sold “AS IS”; or Products that
have been subject to: (a) modifications, alterations, tampering, or improper maintenance or repairs; (b) handling, storage, installation, testing,
or use not in accordance with the User's Guide or other instructions provided by MRCOOL; (c) abuse or misuse of the Product; (d) breakdowns,
fluctuations, or interruptions in electric power or the telecommunications network; or (e) Acts of God, including lightning, flood, tornado,
earthquake, or hurricane. This warranty does not cover consumable parts, unless damage is due to defects in materials or workmanship of
the Product, or software (even if packaged or sold with the product). Unauthorized use of the Product or software can impair the Product 's
performance and may invalidate this Limited Warranty.
8. DISCLAIMER OF WARRANTIES
EXCEPT AS STATED ABOVE IN THIS LIMITED WARRANTY, AND TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, MRCOOL DISCLAIMS
ALL EXPRESS, IMPLIED, AND STATUTORY WARRANTIES AND CONDITIONS WITH RESPECT TO THE PRODUCT, INCLUDING THE IMPLIED
WARRANTIES OF MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW.
MRCOOL ALSO LIMITS THE DURATION OF ANY IMPLIED WARRANTIES OR CONDITIONS TO THE DURATION OF THIS LIMITED WARRANTY.
9. LIMITATION OF DAMAGES
IN ADDITION TO THE ABOVE WARRANTY DISCLAIMERS, IN NO EVENT WILL MRCOOL. BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL,
EXEMPLARY, OR SPECIAL DAMAGES, INCLUDING ANY DAMAGES FOR LOST DATA OR LOST PROFITS, ARISING FROM OR RELATING TO THIS
LIMITED WARRANTY OR THE PRODUCT, AND MRCOOL'S TOTAL CUMULATIVE LIABILITY ARISING FROM OR RELATED TO THIS LIMITED
WARRANTY OR THE PRODUCT WILL NOT EXCEED THE ORIGINAL PRICE OF THE PRODUCT.
10. LIMITATION OF LIABILITY
MRCOOL ONLINE SERVICES (“SERVICES”) PROVIDE YOU INFORMATION (“PRODUCT INFORMATION”) REGARDING YOUR MRCOOL’S PRODUCTS
OR OTHER PERIPHERALS CONNECTED TO YOUR PRODUCTS (“PRODUCT PERIPHERALS”). THE TYPE OF PRODUCT PERIPHERALS THAT MAY BE
CONNECTED TO YOUR PRODUCT MAY CHANGE FROM TIME TO TIME WITHOUT LIMITING THE GENERALITY OF THE DISCLAIMERS ABOVE. ALL
PRODUCT INFORMATION IS PROVIDED FOR YOUR CONVENIENCE, “AS IS”, AND “AS AVAILABLE”. MRCOOL DOES NOT REPRESENT, WARRANT,
OR GUARANTEE THAT PRODUCT INFORMATION WILL BE AVAILABLE, ACCURATE, OR RELIABLE OR THAT PRODUCT INFORMATION OR USE OF
THE SERVICES OR PRODUCT WILL PROVIDE SAFETY IN YOUR HOME. YOU USE ALL PRODUCT INFORMATION, THE SERVICES, AND THE PRODUCT
AT YOUR OWN DISCRETION AND RISK.
YOU WILL BE SOLELY RESPONSIBLE FOR, AND MRCOOL DISCLAIMS ANY ASSOCIATED DAMAGES, INCLUDING TO YOUR WIRING, FIXTURES,
ELECTRICTY, HOME, PRODUCT, PRODUCT PERIPHERALS, COMPUTER, MOBILE DEVICE, AND ALL OTHER ITEMS AND PETS IN YOUR HOME,
RESULTING FROM YOUR USE OF THE PRODUCT INFORMATION, SERVICES, OR PRODUCT. PRODUCT INFORMATION PROVIDED IS NOT
INTENDED AS A SUBSTITUTE FOR DIRECT MEANS OF OBTAINING THE INFORMATION. IN ADDITION TO THE ABOVE, IN NO EVENT WILL MRCOOL
BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, EXEMPLARY, ACCIDENTAL, OR SPECIAL DAMAGES, INCLUDING ANY DAMAGES ARISING
DUE TO THE USAGE OF PRODUCT OR PRODUCT PERIPHERALS.
11. VARIATIONS THAT MIGHT APPLY TO THIS LIMITED WARRANTY
Some jurisdictions do not allow limitations on how long an implied warranty lasts or exclusions/limitations on
incidental or consequential damages, so some of the limitations set out above may not apply to you.
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Smart Wi-Fi Mini-Stat
The design and specifications of this product and/or manual are subject to change
without prior notice. Consult with the sales agency or manufacturer for details.
