Mitsubishi Electric City Multi and Lossnay fault codes
Larger systems on the four-digit M-NET scheme. Different vocabulary entirely, and the place where the bridge codes matter.
Codes on the City Multi and Lossnay follow the same Mitsubishi Electric scheme as the rest of the range. Where a code behaves differently on this generation, the code page says so.
Mitsubishi Electric fault codes
Every published Mitsubishi Electric code. Open a code to see which models and years it applies to.
- PAA drain fault. Mitsubishi tell their own engineers not to assume the pump has failed — the usual cause is a blockage backing the water up.Get it checked
- U1U1 is a high-pressure fault on a Mitsubishi air conditioner and on an Ecodan alike. The fault is the same; the checks depend on which appliance you have.Get it checked
- 2503A drain sensor fault, which is the version where the tray is clean. Mitsubishi note the indoor unit may have a float switch instead of a sensor.Get it checked
- EFA non-defined error that Mitsubishi attribute to noise interference, with a published owner remedy: power down for thirty seconds.Usually simple to fix