Daikin FTXM and CTXM wall splits fault codes
The common domestic range. The published code table and the remote retrieval procedure both come from this manual, so they are the best documented units in the category.
Codes on the FTXM and CTXM wall splits follow the same Daikin scheme as the rest of the range. Where a code behaves differently on this generation, the code page says so.
Daikin fault codes
Every published Daikin code. Open a code to see which models and years it applies to.
- U0Refrigerant shortage. The circuit is sealed, so if it is short it has leaked — and this is certified work by law, not a top-up.Get it checked
- A5Freeze-up protection or high pressure control. A filthy indoor filter is a legitimate published cause, which makes this the one on the list worth checking yourself.Get it checked
- U4The indoor and outdoor units have stopped talking. Daikin’s own cause list starts with the mains supply and the inter-unit cable, so one breaker cycle is worth a try before anyone is called.Get it checked
- E6The compressor failed to start. It sits in Daikin’s outdoor unit group alongside the overload and pressure codes, and all of them are certified work.Get it checked
- 00Not a fault. Daikin publish 00 as NORMAL, and it is also what shows while you are stepping through the diagnostic.Usually simple to fix