HVAC, Heat Pump & POE Compressor Oil
Diagnosing Octovalve expansion valves, R1234yf refrigerant, and mandatory non-conductive POE oil rules.
HVAC & Battery Thermal Regulation
EV air conditioning systems cool both the passenger cabin and the high-voltage battery pack (chiller) during fast DC charging sessions.
Critical Compressor Oil Safety Rule:
- Mandatory Non-Conductive POE Oil: Only non-conductive synthetic POE (Polyolester) oil may be used. Standard PAG oil causes internal high-voltage short circuits (>400V) that destroy the electric compressor.
- R1234yf Leak Detection: Checking front condenser and chiller evaporator loop seals for refrigerant leaks.
- Multi-Port Valve Testing: Servomotor testing on thermal management direction valves (e.g. Octovalve).
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