ELECTRIC COMPRESSOR DOES NOT OPERATE WHEN HEATING FOR ONLY HEAT PUMP IS PERFORMED [FULL-AUTO AIR CONDITIONER]

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Warning

<<High voltage>>

•  If the necessary measures are not taken before servicing an electric vehicle, it could cause electrical shock and result in serious injury or, in the worst case, death. Before servicing the electric vehicle, refer to [HIGH VOLTAGE SERVICE CAUTIONS] in the general information and implement the necessary measures. (See HIGH VOLTAGE SERVICE CAUTIONS.)

Malfunction symptom	Electric compressor does not operate when heating for only heat pump is performed
Details	•  Electric compressor does not operate when heating for only heat pump is performed
Possible Cause	Note •  Condenser may not operate due to a fail-safe measure against refrigerant gas leakage •  A/C pressure sensor (high voltage battery side) malfunction •  Evaporator temperature sensor malfunction •  Ambient temperature sensor malfunction •  Malfunction of temperature sensor of refrigerant line for condenser outlet •  Condenser malfunction •  Electric compressor malfunction

Diagnostic Procedure

Warning

<<High voltage>>

•  If necessary measures such as wearing the correct protective gear are not taken when inspecting or removing/installing the high voltage parts, it could cause electrical shock and result in serious injury or, in the worst case, death.

•  Before inspecting or removing/installing the high voltage parts, refer to [HIGH VOLTAGE SERVICE CAUTIONS] in the general information and [High Voltage Part Inspection and Removal/Installation Notes] of the high voltage system service cautions and implement the necessary measures and preparations. (See HIGH VOLTAGE SERVICE CAUTIONS.) (See HIGH VOLTAGE SYSTEM SERVICE CAUTIONS.)

Step	Inspection		Action
1	INSPECT REFRIGERANT PRESSURE •  Is the pressure less than 0.2 on the high and low pressure sides?	Yes	Go to the next step.
		No	Go to Step 3.
2	INSPECT SYSTEM PIPING •  Inspect the system piping for gas leakage using the gas leak tester. (See REFRIGERANT CHARGING.) •  Is the system piping normal?	Yes	Replace the high voltage battery and perform the repair completion verification. (See HIGH VOLTAGE BATTERY REMOVAL/INSTALLATION.)
		No	Replace the O-ring of the malfunctioning location (system piping connecting area). Or replace the malfunctioning location of the system piping and perform the repair completion verification. (See FLEXIBLE HOSE REMOVAL/INSTALLATION.)(See FRONT COOLER PIPE REMOVAL/INSTALLATION.)(See REAR COOLER PIPE REMOVAL/INSTALLATION.)
3	INSPECT REFRIGERNAT PRESSURE SENSOR (HIGH VOLTAGE BATTERY SIDE) •  Inspect the refrigerant pressure sensor (high voltage battery side). (See REFRIGERANT PRESSURE SENSOR No.2 INSPECTION.) •  Is the refrigerant pressure sensor normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See REFRIGERANT PRESSURE SENSOR No.2 REMOVAL/INSTALLATION.)
4	INSPECT EVAPORATOR TEMPERATURE SENSOR •  Inspect the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].) •  Is the evaporator temperature sensor normal?	Yes	Verify the evaporator temperature installation condition and repair the installation position. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
5	INSPECT AMBIENT TEMPERATURE SENSOR •  Inspect the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].) •  Is the ambient temperature sensor normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
6	INSPECT TEMPERATURE SENSOR OF REFRIGERANT LINE FOR CONDENSER OUTLET •  Inspect the temperature sensor of refrigerant line for condenser outlet. (See TEMPERATURE SENSOR OF REFRIGERANT LINE FOR CONDENSER OUTLET INSPECTION [FULL-AUTO AIR CONDITIONER].) •  Is the temperature sensor of refrigerant line for condenser normal outlet?	Yes	Go to the next step.
		No	Replace the temperature sensor of refrigerant line for condenser outlet and perform the repair completion verification. (See TEMPERATURE SENSOR OF REFRIGERANT LINE FOR CONDENSER OUTLET REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
7	INSPECT CONDENSER •  Inspect the condenser. (See CONDENSER INSPECTION.) •  Is there cool airflow?	Yes	Go to the next step.
		No	Replace the condenser and perform the repair completion verification. (See CONDENSER REMOVAL/INSTALLATION.)
8	INSPECT CONDENSER FOR HIGH TEMPERATURE MALFUNCTION •  Open the hood and facilitate heat radiation by blowing air using a fan. •  Verify if operation starts after 30 min.	Yes	Explain to the customer that it is a temporary fail-safe measure.
		No	Replace the electric compressor and perform the repair completion verification. (See ELECTRIC COMPRESSOR REMOVAL/INSTALLATION.)
Repair completion verification	VERIFY THAT MALFUNCTION DOES NOT RECUR AFTER REPAIRS •  Perform heating for only heat pump and verify that the electric compressor operates.	Yes	Troubleshooting completed (explain repair contents to customer).
		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1.