Temperature out of range

When the room temperature is out of range, i.e. above 49 °C or below 0 °C, the temperature is displayed and flashes at "0 °C" or "49 °C", and the thermostat continues to work.

Sensor error

"Er1" is displayed when the internal sensor does not work properly.

"Er3" is displayed when the external sensor is missing or does not work properly.

TOUCH IC error

"Er2" is displayed upon an error in the internal TOUCH IC.

VRF error

The error codes are displayed upon errors in the VRF indoor unit. For indoor unit error codes, see Control parameters.