HVAC System Service Mode
The vehicle uses two separate circuits, one circuit for the evaporator situated in the HVAC assembly for the cabin environment, and an additional circuit for the HV battery heat exchanger.
Both of these circuits have solenoid valves controlled by the thermal controller module. During A/C evacuation and recharge, it is important to open these solenoids manually (Service Mode). This will ensure that all refrigerant is removed and replaced from both circuits during evacuating and recharge of the air conditioning system.
WARNING:
HVAC Service Mode must be initiated using Toolbox before any evacuation and recharge procedures are performed.
With the vehicle in Service Mode, the refrigerant can be recovered or recharged. The HVAC system will stay in Service Mode until the mode is exited using Toolbox, or the laptop is disconnected from the vehicle.
WARNING:
It is important that the key remains in the vehicle during evacuation or recharge. If it is removed, Service Mode will be disabled, thus closing the solenoids, which means that there is a risk that the HVAC lines may not be fully evacuated or filled during recharge.
NOTE:
When in Service Mode, all normal HVAC system operation is disabled apart from operation of the battery coolant pump.