Description:

The error code ETC 000923.00 is triggered when the power module (HF) PC6 measures a total amperage exceeding 40 amps at one of the fan motor outputs (B1 and/or C3). This condition indicates a short to ground or a defective component in one of the monitored circuits.

Reaction:

When this fault is detected, the power module may deactivate the affected fan motors to prevent damage due to excessive current. This can result in overheating or reduced cooling efficiency.

Recommendations:

Inspect Electrical Circuits:

• Check for Shorts to Ground: Inspect the wiring and connectors for the fan motor outputs for signs of shorts to ground. Look for damaged insulation, exposed wires, or pinched cables.
• Measure Current Draw: Use a multimeter to measure the current draw of the fan motors (M07 and M10) to ensure they are within the specified range.

Test and Replace Components:

• Test Fan Motors: Verify the operation of the M07 and M10 fan motors. Replace any motors that are found to be defective or drawing excessive current.
• Inspect Power Module: Ensure that the power module (HF) PC6 is functioning correctly. Replace the power module if it is found to be faulty.

Repair or Replace Wiring:

• Fix Damaged Wiring: Repair or replace any damaged or shorted wiring in the fan motor circuits. Ensure all connections are secure and properly insulated.

Note:

Regular maintenance and inspection of the cooling system’s electrical components can help prevent issues related to current overload. Ensuring proper routing and securing of wires can reduce the risk of shorts and enhance the reliability of the system.