Error code reference

LG Dishwasher Error Code 3C1

Circulation pump sub-error from Inverter PBA (S/W ver

Circulation pump sub-error from Inverter PBA (S/W ver. 7134+); no rinse aid during rinse cycle if C-pump RPM target changes to 0 rpm.

First step from the service manual

Check Inverter PBA and Circulation Pump connections.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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3C1 on my LG LDP6797ST

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Circulation pump sub-error from Inverter PBA

From Service Manual 967764, p.16:

1.Check Inverter PBA and Circulation Pump connections.

2.Measure drain pump winding resistance at connector J7 on the main control. Expected: 12 to 16 ohms at room temperature.

3.Back-probe the pump driver output under load. Verify the board switches the pump at 120 VAC during the drain portion of the cycle.

Part 4681EA2001T

Drain pump motor

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