MANUAL AIR CONDITIONER FUNCTION [MANUAL AIR CONDITIONER]

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Block Diagram

• The climate control unit sends an A/C signal to the PCM based on signals sent from the A/C switch, fan switch and evaporator temperature sensor.

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Outline of Control System

• Manual air conditioner defroster control and A/C compressor control.

Control name | Control part
--- | ---
Defroster control | Climate control unit
A/C compressor control | Climate control unit

A/C Compressor Control

• The climate control unit sends an A/C signal to the PCM based on signals sent from the A/C switch, fan switch and evaporator temperature sensor.

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A/C signal on/off Control

• The climate control unit turns the A/C signal (magnetic clutch) on and off based the temperature of the air passing through the evaporator when the A/C and fan switch are on. This keeps evaporator surface temperature within the specified range, preventing the evaporator from freezing while the fan switch and A/C switch are turned on.

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Defroster Control

• To improve defrosting when the climate control unit airflow mode dial is turned to defroster position, the defroster control switches air intake to FRESH mode, and switches A/C to ON.