KIA Niro: Electric A/C Compressor
Electric A/C Compressor body inside inspection
- Electric compressor body inside check procedure.
1) Remove the low-pressure pipe from the electric compressor.
2) Check if the copper wire and white thread inside of the compressor was contaminated.
- To check the compressor motor, measure the resistance of the 3-phase power pin.
1) If the 3-phase resistance value is out of specification, it means motor malfunction. Replace the whole compressor assembly.
Electric A/C Compressor inverter inspection
- To check the compressor inverter, measure the resistance value of the compressor's high voltage pin, low voltage pin and insulation.
(1) High voltage pin
Normal resistance value : 100 ↑
Abnormal resistance : 100 ↑
(2) Low voatage pin
- Measure CAN HIGH/LOW Resistance
- Measure terminals 2 and 5.
Normal : 120 Ω Abnormal : inverter short-circuited (=0Ω)
- Measure CAN Ground Resistance
- Measure terminals 1 and 2 / 1 and 5.
Normal : 13~14 KΩ / 200~600 KΩ (High Performance DSP Specifications) Abnormal : inverter short-circuited (=0Ω)
- Measure Interlock HIGH/LOW Resistance measure (Connect high voltage connector (A) and measure low voltage (B) 3 and 6 resistance.)
Normal : Below 1.0 Ω Abnormal : MΩ
Warning
- Compressor insulation resistance measurement.
Normal resistance value : check insulation resistance (Minimum : 100 MΩ) (@500 Vdc, no coolant)
Replacement
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Remove the battery (-) cable. Disconnect the high voltage circuit. (Refer to Generals) Use the recovery/reproduction/charging device to recover the coolant. Warning When removing the connector between the vehicle and the compressor,Condenser
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