Control By A/C Auto Amp.
Low Temperature Protection Control
When intake sensor detects that evaporator fin temperature is
[-5.0 deg. C (23.0 deg. F)] or less, A/C auto amp. requests ECM to turn the compressor OFF, and stops the compressor.
When the air temperature returns to
[1.0 deg. C (33.8 deg. F)] or more, the compressor is activated.
NOTE:
Target temperature upper limit value of evaporator can be changed using "TARGET EVAPORATOR TEMP UPPER LIMIT SETTING" in "WORK SUPPORT" mode of CONSULT. Refer to Setting of Target Evaporator Temperature Upper Limit Value .
Refrigerant Discharge Amount Control
- When setting temperature is full cold or air outlet is other than DEF, A/C auto amp. controls the refrigerant discharge amount by adjust the duty ratio of ECV according to required amount of cooling capacity.
- When evaporator temperature is target temperature upper limit value or more, A/C auto amp. increases the discharge amount.
- When evaporator temperature is less than target temperature upper limit value, A/C auto amp. reduces the discharge amount.
NOTE:
Target temperature upper limit value of evaporator can be changed using "TARGET EVAPORATOR TEMP UPPER LIMIT SETTING" in "WORK SUPPORT" mode of CONSULT. Refer to Setting of Target Evaporator Temperature Upper Limit Value .
Compressor Oil Circulation Control
When the engine starts, A/C auto amp. activates the compressor for a few seconds and circulates the compressor oil once.