Description:

The error code ETC 000923.01 is generated when the power module (HF) PC6 measures less than 3 volts at the supply voltage for one or both fan motor outputs (lead 0752 and/or lead 0762) when the fan motors (M07 and M10) are switched on. This indicates a problem with the supply voltage for the fan motor outputs.

Reaction:

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

Recommendations:

Inspect Power Supply:

• Check Supply Voltage: Use a multimeter to measure the supply voltage at the fan motor outputs. Ensure it is above 3 volts when the fan motors are activated.
• Inspect Wiring and Connections: Examine the wiring and connectors for the fan motor outputs for signs of damage, loose connections, or corrosion. Repair or replace any compromised wiring.

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 causing a power supply fault.
• 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 faulty wiring in the fan motor circuits. Ensure all connections are secure and properly insulated.

Note:

Maintaining a stable power supply to the fan motors is essential for the reliable operation of the cooling system. Regular inspection and maintenance of the electrical connections can help prevent power supply faults and ensure proper system performance.