To Next PageTo Next PageWhy is my Toshiba Air Conditioner not responding to the remote and showing a check code?
If your Toshiba Air Conditioner isn't responding to the indoor remote controller and a check code is on the 7-segment display of the interface PC board, it might be because there is no header unit of group control. Set up a group address. Also, make sure the line and indoor addresses of all connected indoor units are set up.
Why is a check code displayed on my Toshiba MMY-MAP1404FT8(Z)-TR remote controller?
If a check code is displayed on your Toshiba Air Conditioner's remote controller, it could be due to several reasons. First, ensure that the outdoor unit power is on. Address setup errors, such as undefined or mismatched line addresses, or duplicated indoor addresses, can also cause this issue; in such cases, set up the address again. Also, verify the terminal resistance setup by checking SW30 bit 2 of the header unit to ensure correct connections between refrigerant lines. Finally, check for any disconnections in the indoor/outdoor communication line and ensure that the number and capacity of connected indoor units are within the specified limits.
What does a check code on my Toshiba MMY-MAP1404FT8(Z)-TR Air Conditioner mean?
If your Toshiba Air Conditioner is showing a check code, it might be due to a transmission circuit error at the interface side. In this case, replace the interface PC board. Also, check that the outdoor unit power is on. If the addresses of the connected indoor units are undefined, or if the outdoor and indoor unit line addresses don't match, you'll need to set up the address again.
Why does my Toshiba Air Conditioner keep showing a check code?
If a check code appears on your Toshiba Air Conditioner's remote, it could be due to communication issues between the outdoor units. Verify the number of connected outdoor units and ensure their power is on. Also, check that the header outdoor unit power is on. Address setup errors, such as undefined or mismatched line addresses, or duplicated indoor addresses, can also cause this issue; in such cases, set up the address again.
What to do if Toshiba MMY-MAP1404FT8(Z)-TR shows a check code after installing a backup?
If you see a check code on your Toshiba Air Conditioner, and you've recently installed an outdoor backup or the power of a follower unit isn't on, this could be the cause. Correct the cause of the error. If it occurs when installing a backup, clear the error after setup finishes. If the power of a follower unit is not turned on, turn on the power.
How to resolve line address errors causing a check code on my Toshiba Air Conditioner?
If your Toshiba Air Conditioner is showing a check code, and you've connected U1/U2 and U3/U4 connectors, it could be due to duplication of outdoor line addresses or a line address setup error. Modify the line address setup of the header unit between lines by setting up SW13 and SW14 on the interface PC board. Also, check that the header outdoor unit power is on.
Why is my Toshiba MMY-MAP1404FT8(Z)-TR showing a check code related to priority settings?
If a check code is displayed on your Toshiba Air Conditioner's remote, and indoor units with priority are duplicated, set up priority for only one indoor unit. If multiple units indicate “L05,” set one unit with priority. Also, check that the header outdoor unit power is on.
General| Power Source | Electric |
|---|---|
| Refrigerant | R410A |
| Operating Temperature (Cooling) | up to 46°C |
| Type | Split System Air Conditioner |
| Power Supply | 380-415V |
Lists the available outdoor unit models for the system.
Wiring diagrams specific to the outdoor unit.
Wiring diagrams for various types of indoor units.
Parts rating for outdoor units operating on 50Hz.
Parts rating for outdoor units operating on 60Hz.
Parts rating for outdoor inverter units operating on 50Hz.
Parts rating for outdoor inverter units operating on 60Hz.
Illustrates the layout of parts within the outdoor unit.
Illustrates the layout of parts within the inverter assembly.
Details of the outdoor inverter print circuit board.
Schematic diagrams of the system's refrigerant piping for various modes.
Control outline specifically for indoor units.
Control outline specifically for outdoor units.
Block diagram of the indoor controller.
Details applied controls for outdoor units.
Functions available via optional P.C. boards for outdoor units.
Outlines the steps and summary for performing test operations.
Checks to be performed before powering on for test operation.
Checks to be performed after the main power is turned on.
Procedures for setting addresses for units and systems.
Troubleshooting guide for issues encountered during test operation.
Procedures for checking operations during test mode.
Functions available for service support.
General overview of troubleshooting procedures and required tools.
Method for diagnosing faults based on check codes.
Diagnosing faults based on information displayed on the remote controller.
Lists check codes displayed on remote controller and outdoor unit I/F board.
General safety precautions to be observed during installation, maintenance, and repair.
Safety precautions related to the new refrigerant.
Important cautions for installation and service work.
