To Next PageTo Next PageWhat to do if the Toshiba MMU-AP0121MH remote controller displays a check code and indoor unit number?
When a fault occurs, the remote controller displays a check code and indoor unit number. To address this, operate the air conditioner according to the instructions for 'Confirmation of error history'.
How to check error history on a Toshiba MMU-AP0121MH Air Conditioner?
To confirm the error history on your Toshiba Air Conditioner after a fault, simultaneously push the SET and TEST buttons for at least 4 seconds. The display will then show the CODE No., UNIT No., and Check Code.
What happens if I push the CL button on my Toshiba MMU-AP0121MH Air Conditioner remote?
Pushing the CL button will erase all of the error history for that indoor unit. To keep the error history, avoid pressing the CL button.
How to confirm error history on Toshiba Air Conditioner?
To view the error history on your Toshiba Air Conditioner, simultaneously push the SET and TEST buttons for at least 4 seconds.
Why should I avoid pushing the CL button on my Toshiba MMU-AP0121MH?
Avoid pressing the CL button on your Toshiba Air Conditioner because doing so will erase the entire error history for that indoor unit.
General| Category | Air Conditioner |
|---|---|
| Cooling Capacity | 12000 BTU/h |
| Heating Capacity | 4.0 kW |
| Power Source | Electric |
| Energy Efficiency Ratio (EER) | 3.21 |
| Refrigerant | R410A |
| Indoor Unit Dimensions (W x H x D) | 798 x 293 x 230 mm |
| Indoor Unit Weight | 9 kg |
| Type | Split System |
| Power Supply | 220-240V / 50Hz |
| Outdoor Unit Noise Level | 50 dB |
| Outdoor Unit Dimensions (W x H x D) | 780 x 540 x 269 mm |
Covers risks of improper installation, usage, and modification of the unit.
Ensures correct installation, earthing, and safe operation practices.
Identifies the air inlet, outlet, and other parts of the outdoor unit.
Details parts for various indoor units: cassette, concealed duct, slim duct, etc.
Set the air outlet flap downwards for heating to ensure even temperature.
Set the air outlet flap upwards for cooling to diffuse cold air evenly.
How to use the swing function to automatically change air direction.
Procedure to stop the horizontal flap from swinging at a desired position.
Turn on power supply, understand operational requirements before use.
Guide on how to start operation, select mode, air volume, and set temperature.
Procedure for stopping the air conditioner unit.
Explains OFF timer, repeat OFF timer, and ON timer functions.
Steps to set timer type, time, and confirm settings.
How to cancel the timer operation.
Guidelines for selecting a safe and suitable location for unit installation.
Instructions on proper earthing and circuit breaker installation.
Instructions on checking, cleaning, and resetting the air filter.
Recommends qualified service personnel for daily maintenance, especially for certain models.
Checks for correct earth wire, air filter installation before operating.
Explains heating operation principles and factors affecting capacity.
Describes the automatic defrost mode and its operation.
Details 3-minute protection, fan rotation, and high pressure switch operation.
Warns against installing near flammable gases or in unsuitable locations.
Specifies requirements for installation space, level mounting, and drainage.
Lists locations unsuitable for re-installation to prevent malfunction or hazards.
Advice on avoiding noise/vibration issues with neighbours and ensuring stable installation.
Common symptoms like misty air, noises, and smells that are not actual failures.
Checks for timer status, power, protective devices, and air settings.
Lists symptoms that require stopping operation and contacting the dealer.
Explains how error codes and indoor unit numbers appear on the remote display.
Procedure to check stored error history on the remote controller.
