E40
Toshiba
Indoor Address Conflict / Duplicate Address
Unit shows E40; often related to indoor unit communication or address conflict on VRF/VRV-type Toshiba systems.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Two indoor units set to same address, Incorrect DIP switch settings, Misconfigured central controller, Faulty address setting memory
How to Fix / Troubleshooting
Safety first: Turn off power to the entire system before changing address settings.
- Step 1 – Identify all indoor units: Access each indoor unit’s PCB and note the address settings (DIP switches or rotary dials).
- Step 2 – Ensure uniqueness: Adjust addresses so that each indoor unit has a unique address as per Toshiba design.
- Step 3 – Sync with controller: On the central controller, perform an address scan or initialization procedure according to the Toshiba manual.
- Step 4 – Power cycle: Power down and then restart the system to allow the new addressing to take effect.
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Repair Difficulty
Hard
4/5
Required Part
Indoor Control PCB (Address Setting)
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