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6 Modes and Operating Conditions

6.1 Terms and Definitions

 TA: Temperature of indoor ambient.

 TE: Temperature of evaporator.

 TS: The set temperature.

 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, FAN and HEAT

in order to achieve and maintain the desired set temperature.

 In Auto mode the unit will choose cooling, heating or fan-only mode based on ΔT(ΔT=TA-TS)

ΔT = TA - TS

Running mode

ΔT ＞ 4F

Cooling

-2F ≤ ΔT ≤ 4F

Fan-only

ΔT < -2F

Heating (Setting temperature is TS-1F)

 The unit will default to running mode when in auto mode under the following circumstances:

 Powering on, changing mode to auto mode or adjusting temperature in auto mode will cause the

unit to default to running mode again.

 A: In auto mode, if the compressor does not run for 15 minutes check condition B.

 B: If ΔT<-8℉ or ΔT ＞2℉, the unit will default to running mode again according to ΔT until the

compressor stops.

Koldfront WAC8001W Service Manual

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