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| When -N516--A- is not actuated by the electronic system, it is open and allows refrigerant to flow to the evaporator in the air conditioning unit. |
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| -N516--A- is installed on vehicles with battery cooling module. It is actuated in hybrid mode if the air conditioner is not set to cooling mode for the passenger compartment, but the hybrid battery unit -AX1- needs to be cooled. |
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| Observe arrow -B- on -N516--A-; it shows the flow direction of the refrigerant (from condenser to evaporator in air conditioning unit). |
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| If, on a vehicle with two evaporators (one each in air conditioning unit and battery cooling module), the measured temperature corresponds to or is below the specified value at one evaporator but the required specified value is not attained at the other evaporator, the system is controlled as follows: The battery regulation control unit -J840- actuates the electric air conditioner compressor at a higher speed via the power and control electronics for electric drive -JX1- and the control unit for air conditioning compressor -J842-. This causes the cooling output of the air conditioner to increase and the pressure on the low-pressure side and the evaporator temperature to drop. If the temperature set value is then not reached at one evaporator, -J840- actuates the shut-off valve 1 for refrigerant of hybrid battery -N516- or the shut-off valve 2 for refrigerant of hybrid battery -N517- such that refrigerant no longer flows through the evaporator which is too cold → Vehicle diagnostic tester, „Guided Fault Finding“ function for air conditioner |
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