Mitsubishi Heavy air conditioner error E1
Meaning
Indoor circuit board fault
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Interconnecting wiring: remote controller wires connected to A & B terminals, signal wires connected in a loop, or indoor circuit board / CPU fault
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Infra-red receiver: open circuit or poor connection in the signal cable, or electrical noise interference
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Remote controller wiring: PAC remote controller connected to KX indoor unit, wire Y open circuit, or X & Y reversed
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Remote controller wiring: open circuit, poor connection or electrical noise interference
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Indoor circuit board or CPU failure
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Defective communication circuit on indoor circuit board
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Remote controller wiring 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: Keeps Flashing
- Outdoor Circuit Board Red LED: Stays Off
Causes and how to check
- 5 possible causes
- the cited manual page, and follow-up questions
No account needed to look up codes.
Model series: SRK
Guides
- Communication error between indoor and outdoor unit: what to check, in which order
Communication (transmission) error codes usually come from the connecting wire, the supply or a board. The checks from easy to hard.