What does 'L05' mean on my Toshiba MMY-MAP1404 Air Conditioner and how to fix it?
If indoor units are indicating “L05” on your Toshiba Air Conditioner, and a check code is displayed, it means there are two or more indoor units set up with priority. Among those units, set only one with priority.
How do I resolve a Toshiba Air Conditioner check code when all connected indoor unit addresses are undefined?
If your Toshiba Air Conditioner displays a check code because all connected indoor unit addresses are undefined, set up the addresses again and modify the setup.
General| Brand | Toshiba |
|---|---|
| Model | MMY-MAP1404 Series |
| Category | Air Conditioner |
| Language | English |
Defines limits for refrigerant pipe length and height differences between units.
Important safety and procedural guidelines for unit installation.
Formula and method for calculating the correct refrigerant amount.
Procedure for adding refrigerant to the system.
Lists error codes displayed on controllers and outdoor units for diagnostics.
Initial checks required for the outdoor and indoor units after powering on.
Important notes and warnings before performing address setup.
Step-by-step guide for setting up and verifying unit addresses.
Manual switch configurations for outdoor units in central control.
How indoor units are automatically set up in central control.
Resetting addresses one by one using a remote controller.
Resetting all indoor unit addresses on a line from the outdoor unit.
Setting addresses for new units using a wired remote controller.
Setting addresses for new units directly from the outdoor unit.
Lists error codes and their causes/countermeasures for remote controllers.
Issues where the remote controller is unresponsive, and a check code is shown.
Problems where the indoor unit doesn't respond without an error code.
Explains causes for incorrect counts of connected indoor/outdoor units.
How to check indoor unit addresses and their positions using the remote controller.
How to view all indoor unit addresses connected to a refrigerant line.
Procedure for modifying indoor unit addresses using a wired remote controller.
Method to change addresses for all indoor units in a refrigerant line.
Steps to clear errors using the main remote controller's service monitor.
How to clear errors using switches on the header unit's interface PC board.
Procedure to clear errors by resetting the system power supply.
Step-by-step guide to set function codes (DN codes) for indoor units.
Initiates cooling test mode for all connected indoor units.
Initiates heating test mode for all connected indoor units.
Functions to collectively start or stop all connected indoor units.
Controls individual indoor units for starting, stopping, or testing.
Displays operational data for each outdoor unit, such as HP capacity and valve status.
Shows cycle data like pressure and sensor readings for each outdoor unit.
Displays outdoor cycle data for selected follower units on the header unit.
Shows indoor unit details like communication status and check codes on the header unit.
Shows the latest error codes written in the outdoor unit's EEPROM.
Controls Pulse Motor Valves (PMV) in indoor units for opening/closing.
Controls solenoid valves in outdoor units for open/close functions.
Method to discriminate abnormal outdoor units using fan operation.
Forcedly opens or closes PMVs in outdoor units.
Important notes regarding backup operation procedures and fault types.
Procedures for setting up compressor backup operation in case of failure.
Important considerations and notes for performing refrigerant recovery.
Procedure for recovering refrigerant when no backup operation is set.
Steps to adjust outdoor unit pressure during refrigerant recovery.
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