H2
Daikin
Daikin air conditioner error H2
Meaning
Malfunction of power supply sensor
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Emergency heat high - communicating mode only
Models
DX16TC, DX18TC, DX7TC, DZ16TC, DZ18T, DZ7TC
Meaning
Electric heat high
Models
DX16TC, DX18TC, DX7TC, DZ16TC, DZ18T, DZ7TC
Causes and how to check
- the cited manual page, and follow-up questions
No account needed to look up codes.
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. - Checking an air conditioner temperature sensor (thermistor)
How to check the room, coil or discharge sensor when the unit reports a sensor error: measure its resistance and compare with the exact model's table.