Information On Insulation Fault Finding
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WARNING:
Incorrect handling of high-voltage components
- Electric shock
- Short circuit
- Fire
- Explosion
→ Only appropriately trained and authorized persons may work on high-voltage vehicles and components.
→ Required qualification: High voltage technician or high voltage expert.
→ Observe national requirements and legislation for this work.
→ Always use insulated tools, such as an > VAS 6883 - insulated tool set when working on these parts.
→ Observe general warning notices for working on the high-voltage system.
> 2X00IN GENERAL WARNING NOTICES FOR WORKING ON THE HIGH-VOLTAGE SYSTEM
- The measurements must be performed using the insulation tester > VAS 6838 - Insulation tester .
- A measuring voltage of 500 V must be selected.
- To obtain the required measuring resistance, the measuring voltage must be present on the insulation tester for at least 5 second.
- Two measurements must always be performed for each measuring point. Positive terminal on shielding and negative terminal on shielding.
- A measurement is only regarded as being within the tolerance range if both measured values (positive terminal on shielding and negative terminal on shielding) are within the tolerance range.
- The direction of measurement of the insulation tester does not affect the test result.
- The measured values must be documented in the "Insulation fault finding test log".
- The test log is stored under Repair Information 2X00IN in the Service Information.
- The measurement process must be repeated after replacing a component in the high-voltage system.
- The high-voltage lines at the power electronics and the E-box (screwed connections) have 5 mating cycles. If these 5 mating cycles are exceeded, a visual inspection must be performed on the high-voltage connectors. Then contact Technical Support.
Insulation fault finding
| 1 | High-voltage battery |
| 2 | E-box |
| 3 | High-voltage charger |
| 5 | Power electronics |
| 6 | Electric motor |
| 8 | Electric air-conditioning compressor |
| 9 | Connection point for high-voltage line between high-voltage charger and electric air-conditioning compressor |
| 10 | Electric passenger compartment heater |