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6 Modes and Operating Conditions
6.1 Terms and Definitions
1. TA: Temperature of indoor ambient.
2. TE: Temperature of evaporator.
3. TS: The set temperature.
4. DAHT: Heater sensor.
6.2 Protection Functions
The compressor restart protection has a delay of 3 minutes.
5 minute operation for compressor in cooling mode.
Sensor protection against an open or short circuit.
6.3 Auto Mode
AUTO Mode is a setting that allows the unit to automatically switch between COOL and FAN in order
to achieve and maintain the desired set temperature.
In Auto mode the unit will choose cooling or fan-only mode based on ΔT(ΔT=TA-TS)
The unit will default to running mode when in auto mode under the following circumstances:
1. Powering on, changing mode to auto mode or adjusting temperature in auto mode will cause the unit
to default to running mode again.
2. A: In auto mode, if the compressor does not run for 15 minutes check condition B.
3. B: If ΔT<-8℉ or ΔT ＞2℉, the unit will default to running mode again according to ΔT until the
compressor stops.
6.4 Fan-Only Mode
If the temperature can’t be controlled by the selected mode and the room ambient temperature is
shown on the display the unit will default to fan only mode.
The readout can only display a temperature of 32 to 99 ℉ (0 to 37℃.) lf the temperature is out of that
range the display will show LO or HI.
The Timer function works in fan-only mode.
The follow me function (on some models) does not work in fan-only mode.
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