Air Conditioner Control

SYSTEM

AIR CONDITIONER CONTROL : System Description


SYSTEM DIAGRAM







DESCRIPTION

In EV, VCM controls the A/C relay so that the air conditioner can operate even in the POWER OFF state. The remote air conditioner and timer air conditioner functions are enabled by this control. When VCM judges a need of air conditioner activation in response to driver operation, timer air conditioner function, or remote air conditioner function, VCM activates M/C relay to start the EV system. VCM also activates the A/C relay to supply power to the A/C system.
In addition, VCM calculates the power that can be used by the air conditioning system based on the Li-ion battery status and vehicle status and sends it to the A/C auto amp.
When ECO mode is selected, VCM sends the ECO mode signal to the A/C auto amp. to control the air conditioner at a lower rate than normal.
For an overview of air conditioner types, refer to "AUTOMATIC AIR CONDITIONING SYSTEM : System Description" System Descriptiol.

CONTROL DESCRIPTION

Air Conditioner Control During Charging
VCM allows the air conditioner to be used during charging. In this case, the air conditioner stops when charging is completed.
NOTE:
If the Li-ion battery available charge gauge level is lower than Level 2, the A/C does not operate during battery charge.
Timer Air Conditioning Control
When all of the following conditions are satisfied, VCM activates the timer air conditioner so that the room temperature reaches 25�
C (77�F) before the scheduled departure time.
- Timer air conditioner timer is ON
- There is AC power input during charging (or in a state where AC power input is possible).
VCM activates the EV system 2 hours before the scheduled departure time. The A/C auto amp. judges the necessary operating time of timer air conditioner within the range between 0 and 2 hours according to the ambient temperature and interior temperature and sends the data to VCM. VCM calculates and judges the operating time required for activating the timer air conditioner, according to the scheduled departure time and the received data.
NOTE:
- When turning ON the power switch during timer air conditioning, the air conditioning control switches to normal.
- When timer charge and the timer air conditioner operate simultaneously, VCM distributes power to the air conditioner system and the charge system according to the priority set on the navigation screen.
Remote Air Conditioning Control
When VCM receives the remote air conditioning request signal from the TCU, the air conditioning is operated.
Remote air-conditioning operates as follows.





NOTE:
When the power is turned ON during remote air conditioning, the remote air conditioning is ended.