Mitsubishi Heavy air conditioner error NO INDICATION
Meaning
Mains power: no mains power detected or T phase wire open
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
No Fault: normal operation
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Infra red receiver wiring: open circuit or poor connection in receiver unit wiring
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Remote controller wiring fault (reversed or open wires)
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Indoor circuit board: a unit on the same network has a fault in its indoor circuit board or CPU
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Remote controller wiring fault: X & Y reversed, Y & Z reversed, or wiring open circuit (X wire broken gives a beep and no indication; Z wire broken gives no beep and no indication)
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Normal operation
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
No mains power detected [power off or power failure]; L phase wire is open circuit
General meaning for the brand's models, unless a model's own manual says otherwise.
How the unit shows it
- Receiver Unit Red LED: -
- Indoor Circuit Board Red LED: Stays Off
- Indoor Circuit Board Green LED: Stays Off
- Outdoor Circuit Board Red LED: Stays Off
Causes and how to check
- 3 possible causes
- the cited manual page, and follow-up questions
No account needed to look up codes.