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HAC-162 < SYSTEM DESCRIPTION > [WITH 7 INCH DISPLAY] BLOWER MOTOR CONTROL SYSTEM BLOWER MOTOR CONTROL SYSTEM System Diagram INFOID:0000000009722150 System Description INFOID:0000000009722151 Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera- SYSTEM OPERATION System operation • For air flow, the manual selection (1-7) with the fan control dial has priority. • If the AUTO switch is pressed or if the DEF switch is pressed while in the OFF condition, it changes to the automatic control by A/C • When increasing the air flow, it changes the duty ratio of the blower motor drive signal to prevent the air flow from suddenly increasing. • There are the following types of air flow control: starting air flow control, starting air flow control at low coolant temperature, starting Normal automatic air flow control • When the target temperature is set by the temperature control dial of preset switch, the A/C auto amp. per- forms the calculation and decides the target according to the signal from each sensor. • The A/C auto amp. changes the duty ratio of blower motor drive signal and controls the air flow continuously so that the air flow becomes the target air flow. • The minimum air flow will change according to the sunload when the air discharge outlet is VENT or B/L. JSIIA1547GB JSIIA0999ZZ |