top of page

Quick Guide

Congrats on getting your TOSOT mini split!

Below are some tips to assist you in maximizing your comfort with TOSOT!

A video showcasing the diverse functionalities provided by your TOSOT mini-split remote control.

A video demonstrating the process of connecting your TOSOT Mini Split to your phone.

If you encounter an issue with your system, please review the following checklist.
If the problem persists, kindly reach out to a qualified local HVAC technician for professional service.
  • Fan continues to run even when the unit is not heating or cooling

To ensure steady temperatures and reduce energy loss caused by frequent starts and stops, the fan maintains a continuous flow of air past the sensor.

  • What temperature is displayed on the remote controller?

The remote consistently shows your selected indoor temperature. (You can also check the current indoor and outdoor temperatures, along with the desired temperature, on the front panel display of the indoor unit.)

  • How do I switch the temperature display from Celsius to Fahrenheit?

Power off the unit, then simultaneously press the "▼" and "MODE" buttons on the remote to toggle between °C and °F.

  • How can I control the unit without using the remote?

Raise the front panel section of the indoor unit and find the AUX button on the right-hand side. Press the button to power the unit ON or OFF. (Note: Not all functions will be accessible in this mode.) Press the button again to exit AUX Mode and return control to the remote.

  • Indoor unit shows an E7 error code.

This indicates a "mode" conflict within your multi-zone system. Ensure that all your indoor units are set to the same mode, either cooling or heating.

  • The indoor unit is not picking up the signal from the remote controller.

  • Eliminate static electricity interference by disconnecting the power at the breaker for 3 minutes.

  • Place the remote within the signal receiving range of 26 feet.

  • Ensure there are no obstacles obstructing the clear path from the remote to the indoor unit receiver.

  • Direct the remote at the receiving window on the indoor unit.

  • If the controller's sensitivity is low, leading to a fuzzy or no display, check and replace the batteries.

  • Inspect the remote controller for any damage; if found, replace it.

  • Avoid electronic interference by bringing the remote controller closer to the indoor unit and turning off other electronic devices.

  • No air coming from the indoor unit

  • Remove any obstructions that may block the air inlet or air outlet of the indoor unit.

  • In HEAT mode, the fan automatically turns off once the indoor temperature is reached, which is a normal operation.

  • During the initial start of HEAT mode, it may take several minutes for the fan to begin, preventing cold air from blowing out, and this is considered normal.

  • Air Conditioner isn't coming on

  • Experiencing a power outage - wait for power to be restored.

  • If you find loose wiring, consult a contractor or electrician.

  • In case of a tripped circuit breaker or burnt-out fuse, seek professional assistance to replace them.

  • If the wiring is overheating or requires repair, hire a professional for replacement.

  • If the unit restarts immediately after stopping operation, turn it off, wait for 3 minutes, and then turn it on.

  • If the remote controller does not display the correct settings, reset the function.

  • Mist is coming from indoor unit's air outlet

Is the indoor temperature and humidity elevated? Mist may form when the indoor air cools rapidly. After some time, the indoor temperature and humidity will decrease, and the mist will dissipate.

  • Cooling/heating is insufficient

  • Verify if the voltage is below the acceptable level. If it is too low, contact an HVAC technician.

  • Examine the filter for dirt. If it is dirty, clean the filter.

  • Ensure that the temperature is set within the correct range.

  • Close doors or windows that should not be open.

  • Can't adjust the "set" temperature

Is your desired temperature outside the specified temperature range? The set temperature range is 16°C-30°C (61°F-86°F).

  • Strange Smell

Identify and eliminate the source of the odor, such as rugs, furniture, cigarettes, etc. Clean the filter.

  • Hearing a water flowing noise

It is typical for the unit to produce a noise when recently turned on or off. The sound is caused by the normal flow of refrigerant inside the unit.

  • Hearing a cracking noise

It is typical for the unit to generate noise when recently turned on or off. The sound is attributed to friction resulting from the expansion and/or contraction of panels or other components due to temperature changes.

  • Air conditioner operates abnormally

If there are interferences, such as lighting or wireless devices, disconnect the power, restore power, and then turn on the unit again.

  • Air guide louver can't be closed normally

Disconnect the power for 3 seconds, reconnect it; if the issue persists, seek assistance from an HVAC technician to address the problem.

Error Code
When the system malfunctions, an error code will be shown on the indoor unit. Refer to the list below to identify the corresponding troubleshooting steps. If there are error codes not listed below, please seek assistance from qualified professionals for service.

U8 / H6 / H3 / E1 / E5 / E6 / E8

Restart the unit. If the issue persists, seek assistance from a certified HVAC technician.

C5 / F0 / F1 / F2

Please contact professional technicians.


Mode conflict, please make sure all the indoor units running either on "Cool" or "Heat" mode in a multi-zone application.

E2 / E9

These are not error codes; they are status codes indicating the operational condition.

Caring For Your TOSOT Mini Splits

1. Clean your indoor unit's air filter once a month.
Conserve energy by preventing the accumulation of dirt and lint on indoor coils. To remove the filter, gently push forward on the handle tabs, then lift it out of place. Rinse or vacuum it—avoid scrubbing with a brush or placing it in the dishwasher to prevent damage.




2. Auto cleaning feature for the indoor unit
While the unit is turned off, press and hold the "MODE" and "FAN" buttons simultaneously for 5 seconds to activate or deactivate the Auto Cleaning function. When Auto Clean is enabled, the indoor unit will show "CL," and it will efficiently heat up and cool down. You might hear sounds like flowing liquid or thermal expansion/contraction. Ensure proper ventilation in the room, as the unit may emit cool or warm air during this process, which is normal.

3. To maintain peak operational performance, schedule professional HVAC servicing for your unit every six months.

bottom of page