Troubleshooting
4.3-3
Troubleshooting
DTC of AVAS
Recommended
countermeasures
Too low battery voltage, please
check battery
Too high battery voltage,
please check battery
Internal fault of control unit
Check the acoustic alerting
control unit.
DTC of battery cooling control unit
Recommended
countermeasures
1. Battery voltage abnormal
2. BCU collection abnormal
Check the wire harness or
replace the BCU.
1. Battery voltage abnormal
2. BCU collection abnormal
Check the wire harness or
replace the BCU.
High pressure sensor open
1. Sensor open
2. Collection circuit abnormal
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
High pressure sensor short
1. Sensor open
2. Collection circuit abnormal
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
1. Sensor open
2. Collection circuit abnormal
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
Low pressure sensor short
1. Sensor open
2. Collection circuit abnormal
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
Low pressure side temperature
sensor open
1. Sensor open
2. Collection circuit abnormal
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
Low pressure side temperature
sensor short
1. Sensor open
2. Collection circuit abnormal
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
PTC water outlet temperature
sensor open
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
PTC water outlet temperature
sensor short
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
1) Check the wire harness and
the sensor; 2) Replace the
BCU.
Electromagnetic expansion
valve (EXV) overpressure
1. Battery voltage abnormal
2. BCU collection abnormal
Check the wire harness or the
EXV.
Electromagnetic expansion
valve (EXV) underpressure
1. Battery voltage abnormal
2. BCU collection abnormal
Check the wire harness or the
EXV.
Internal fault of water pump
1. Inspect the line.
2. Inspect the pipeline.
3. Inspect the w ater pump
status.
1. Inspect the circuit to see if
the PTC can heat normally;
2. Professional personnel carry
out overhaul.
Protection of high system
pressure
1. Test the circuit. 2. Verify the
pressure. 3. Condenser has
poor heat dissipation. 4.
Professional personnel carry
out service.