Error Code PC

The water distribution vane that directs spray is not moving to the correct position

Also displayed as: PC (no display during normal operation)

What This Means

Motor gear (synchronous motor) defective; Sensor vane defective; Vane mechanism blocked by foreign object; Distributor motor defective; Micro switch defective

First Thing to Check

Parts Involved

How to Fix

1. 1

   1. Check connections for the distributor motor and micro switch connectors — reconnect

2. 2

   2. Measure distributor motor coil resistance (disconnect before measuring) — normal: approximately 3.6 to 4.0k ohms

3. 3

   3. Check micro switch position sensing — check conduction between brown and violet wire. Micro switch on: Short. Micro switch off: Open. Signal should alternate on/off. NG if stuck on or off for 120 seconds

4. 4

   4. For vane motor: measure coil resistance between Red and Black wire (CCW) and White and Black wire (CW) — normal: approximately 1.625 to 1.796k ohms

5. 5

   5. Check sensor vane — Brown to Black wire: Sensor on = 0V, Sensor off = 5V

6. 6

   6. Adjust Cam Assembly and identify fault — replace if faulty

7. 7

   7. Check half load / vane relay operation — measure voltage between CN401 pin 3 (Brown) and CN101 pin 1 (White) — normal: 110-120V while operating

8. 8

   8. For vane motor relay: CCW = CN401 pin 8 (Red) to CN101 White, CW = CN401 pin 7 (White) to CN101 White — normal: 110-120V while operating

9. 9

   9. Check the Power Relay — see Power Relay check procedure

This Error Applies To

Samsung DDW24M999U Series Dishwashers (2017) (2017–present)