During normal charging, domestic circuit breaker interrupts the power supply.

Inspection Procedure 9: During normal charging, domestic circuit breaker interrupts the power supply.

COMMENTS ON TROUBLE SYMPTOM

If the domestic circuit breaker interrupts the power supply during normal charging, the malfunction of the EV home & quick charger cable, normal charging cable or On Board Charger (OBC)/DC-DC converter, or the excess of the allowable current due to simultaneous use of other household electronics is suspected.

TROUBLESHOOTING HINTS

Malfunction of the EV home & quick charger cable
Malfunction of the normal charging cable
Malfunction of the On Board Charger (OBC)/DC-DC converter

note	The trouble may occur due to the following external factor. • The excess of the allowable current due to simultaneous use of other household electronics

DIAGNOSIS

Required Special Tools:

MB991223: Wiring harness set
MB992006: Extra fine probe

1.Check indicator on control box of normal charging cable.

Check the indicator on the control box of the normal charging cable (Refer to TROUBLE SYMPTOM CHART

Is the check result normal?

Perform the corrective action according to the control box indicator.

2.Check usage condition of the AC power supply

Check whether the AC power supply using for the charging also used for other home electric appliances.

Is the check result normal?

Stop using the AC power supply for other home electric appliances.

3.Check current capacity of domestic power supply equipment.

Check that the current capacity of the domestic power supply equipment is not lower than the restricted current of the control box of the normal charging cable.

Is the check result normal?

Check the domestic power supply equipment.

4.Check of the normal charging cable.

Check the normal charging cable (Refer to CHARGING CABLE CHECK

) .

Is the check result normal?

Replace the normal charging cable.

5.Check of the normal charge port connector for the insulation resistance.

danger

When servicing the high voltage system parts, always shut off the high voltage by removing the service plug (Refer to PRECAUTIONS ON HOW TO USE THE HIGH-VOLTAGE VEHICLE).
When servicing the high voltage system parts, always wear the protective equipment or armour to measure the high-voltage (Refer to PRECAUTIONS ON HOW TO USE THE HIGH-VOLTAGE VEHICLE).

caution

Before measuring the insulation resistance, set the range of the electric insulation tester (Special tool: MB992355) to 500 V.If a range exceeding 500 V is used for the measurement, the part may be damaged.

(1) Disconnect the On Board Charger (OBC)/DC-DC converter connector (H9), and measure the insulation resistance at the wiring harness side.

(2) Measure the following harness for resistance

Resistance between On Board Charger (OBC)/DC-DC converter connector (HOT terminal), and body ground
Resistance between On Board Charger (OBC)/DC-DC converter connector (COLD terminal), and body ground

OK: 10 MΩ or more

Is the check result normal?

Replace the EV home & quick charger cable (Refer to EV HOME & QUICK CHARGER CABLE REMOVAL AND INSTALLATION

6.Retest the system.

Does the trouble symptom persist?

Replace the On Board Charger (OBC)/DC-DC converter (Refer to ON BOARD CHARGER (OBC) &DC-DC CONVERTER REMOVAL AND INSTALLATION

The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS

) .