Mitsubishi Heavy air conditioner error E9
Meaning
Drain motor [DM] failure (drain motor open circuit or the drain motor is disconnected from the indoor PCB)
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Defective float switch input circuit on indoor PCB. Defective drain motor output circuit on indoor PCB
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Incorrect wiring of condensate drain kit (typically on wall mounted indoor units)
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
High limit of condensate still detected in drain tray (the drain motor can not remove the condensate - blockage in discharge pipe or condensate returning to drain tray). Float switch stuck in high position
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Condensate still detected in drain tray (drain motor cannot remove condensate: blockage in discharge pipe or condensate returning to drain tray); float switch stuck in high position
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: Flashes Once
- Indoor circuit board Green LED: Keeps Flashing
- Outdoor circuit board Red LED: Stays Off
Causes and how to check
- 2 possible causes
- the cited manual page, and follow-up questions
No account needed to look up codes.
Guides
- Pressure, low refrigerant and high discharge temperature errors: where to start
Pressure and discharge-temperature protection codes: tell a low charge from a blockage or poor heat rejection before charging.